Telos One-x-Six User's Manual
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Telos ONE—x-Six
Complete Talk Show Telephone System
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User's Manual
Revision C — September, 1995
Telos Systems
2101 Superior Avenue
Cleveland, OH 44114
(216) 241-7225
FAX: (216) 241-4103
€ Copyright 1993-95 by TLS Corporation
A personal note from Steve Church
December 1, 1993
At the NAB in 1985, I offered the first public demonstration of my Telos 10-the
first broadcast audio device to use real time, digital signal processing (DSP). The
response was quite positive because the Telos 10 incorporated the first telephone
hybrid that actually worked!
The Telos 10 was far from perfect. You needed a 1A2 key system to connect the
central office telephone lines. A wide ribbon cable was used between the Switch
Console and the main unit. And, I must confess, | probably could have done a better
Job selecting the buttons for the Switch Console. (And those were among the most
expensive switches | evaluated!)
As Telos grew, we replaced the Telos 10 with the widest assortment of equipment
for telephone-to-broadcast interface. The performance of our hybrids continued to
improve and, with the Direct Interface Module, we allowed direct connection to
incoming phone lines. We grew to a “real company” and, as we added engineering
resources, offered vou more advanced technologies and enhanced operational
features.
There remained, however, a nostalgia for the Telos 10. Its users forgot that it was
expensive and limited in function, but remembered that it came packaged as a
complete system. Additionallv, we heard from many smaller installations who
encouraged us to create a complete talk show svstem at a more moderate price.
The Telos ONE-x-Six 15 our response to your requests. The digital hybrid
performance is spectacular, the unit connects to six central office lines directly, and
the main unit comes packed with a Switch Console in the same carton. The
ONE-x-Six is easv to install and maintains all of the features of our modular
systems. And, best ot all, we offer the ONE-x-Six to vou at a price that makes it
extremely aftordable.
We trust vou will like it.
Keep on keeping the GM happy...
Steve Church
President, Telos Svstems
User's Manual Revision C, September 1995
ONE—x-Six
1.0
2.0
3.0
1.1
1.2
2.3
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INTRODUCTION 1
System Overview 2
Digital Hybrid Overview 3
1.2.1 Special Hybrid Features 4
INSTALLATION 5
Connection to Telco Lines 6
2.1.1 The Central Office Connection 6
2.1.2 Integration with Electronic Phone Svstems 7
Audio Connections 12
2.2.1 Mix-Minus 12
2.2.2 Input Audio Connection 14
2.2.3 Output Connections 14
Other Rear Panel Connections 15
2.3.1 Aux Phone 16
2.3.2 Second Hybrid (Optional) 16
2.3.3 Switch Consoles 18
2.3.4 Program-On-Hold Input 19
2.3.5 RS-232 19
2.3.6 Remote 19
2.3.7 AC Receptacle 21
Internal User Option DIP Switches 21
Front Panel Gain Adjustments 23
2.5.1 Input Gain 25
2.5.2 Output Gain 24
[Installing Switch Console Button Legends 25
OPERATION 27
Front Panel Controls and Indicators 25
5.1.1 Line Status LEDs 28
3.1.2 Program-On-Hold Level LED 28
3.1.5 Metering 28
3.1.4 Output Processing: Override 26
3.1.5 Output Processing: AGC 50
3.0 OPERATION (Continued)
3.1.6 Hybrid Status 30
3.1.7 Gain Controls 31
3.2 The Switch Console 31
3.2.1 General 31
3.2.2 Touch Tone® Pad 32
3.2.3 Line Buttons and LED Indicators 32
3.24 Placing Callers on-air 33
3.2.5 Screening Calls 34
J
3.2.6 Special Function Buttons 36
3.2.7 Changing Button Legends 3
3.3 Console Mounted Control Panels 37
RS-232 Serial Port 38
34.1 Port Characteristics 38
3.4.2 Data Protocol 38
3.5 Feedback Control 40
4.0 TROUBLESHOOTING 43
4.1 Philosophy 44
4.2 General Troubleshooting Information
4.3 Power Supply 46
5.0 APPENDIX 47
Hybrid Specifications 49
44
Switch Console Modular Connector Pin-Qut 50)
RJ11C format for Telos Switch Consoles 51
Telos ABS Switch Console Options
Dual 10-line Panel Options 53
Warranty and Application Caution
Hybrid Specifications 47
6.0 SIMPLIFIED INSTRUCTIONS 55
Switch Console Operating Instructions
7.0 PARTS LISTS AND SCHEMATICS
Parts Lists and Schematics Contents
5
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6
61
62
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SECTION 1
INTRODUCTION
1.1 SYSTEM OVERVIEW
The ONE-x-Six is a complete six-line, on-air phone system designed for use in
broadcast, teleconferencing, and other applications. The ONE-x-Six incorporates
a Telos ONE digital hybrid telephone interface and a six-line switching svstem in
a single height 19" rack-mount unit. For line selection, the unit comes packaged
with one desktop Switch Console.
The ONE-x-5ix connects to standard dial-up phone lines from the telco central
office using industry standard R}11C connectors. The ONE-x-Six communicates
with the Switch Console (or optional console-mounted control surfaces) bv sending
and receiving serial data over a “skinny wire” data link. This serial link uses a
modular phone type cable. The Switch Console is powered via the modular cable,
as well.
The ONE-x-Six will switch up to six lines and can support two Switch Consoles
directly. More switch consoles can be added by using external power supplies. The
ONE-x-Six routes phone lines to its internal hybrid. Audio input and output are
connected via XLRs. The balanced input can be mic or line level. Two balanced
outputs are provided: one output has caller-only audio; the second output may be
switched for either a second caller-only output or a mix of the input and caller
signals.
The ONE-x-Six provides extra contact closures for the user-assignable buttons on
the Switch Console and an IBM AT-stvle RS-232 serial port for computer control
with software such as Telos” Call Screen Manager. The ONE-x-Six also has a
Program-On-Hold input with AGC.
A standard, single line telephone set (user provided) is used for call screening. If
full screening functions are not required, a second, external Telos hvbrid mav be
connected to enhance conferencing callers.
The ONE-x-Six has heen designed with careful attention to audio performance in
order to insure that the caller audio arrives af sor mipment with neglivible
degradation. Because the audio processing tunction ar performed in the digital
domain and the telephone switching system 15 sottware driven, the hardware
design of the Telos ONE-x-Six is quite simple.
Telos ONE-x-Six Rev. C INTRODUCTION
1.2 DIGITAL HYBRID OVERVIEW
The Telos ONE-x-Six uses the same digital hybrid found in the Telos ONE digital
hybrid telephone interface. The hybrid embodies a state of the art approach to
interfacing telephone lines for broadcast, teleconferencing, distance learning, and
other uses. The very fast and precise digital automatic nulling allows smooth,
natural, simultaneous conversation without the usual speakerphone up-cutting
effect or the audio distortion and feedback problems often experienced with
analog hvbrid-tvpe interface devices.
The purpose of the digital telephone hvbrid is to deliver to the console pure caller
audio with as little of the send (announcer) audio as possible mixed in. Until
digital signal processing techniques were applied to the telephone interface
problem, there were two choices:
Switching. The send and receive paths were separated by having only
one talk direction active at a time. Common “speakerphones” use this
approach. The disadvantage is that natural conversation is impossible,
since the caller is cut off when the announcer talks and vice-versa.
Analog hybrids. These were, on most phone lines, very poor at removing
the send signal from the caller's audio. This meant that the announcer's
voice would become distorted as the phone audio was added to the mix.
Telos hybrids use digital techniques to perform the hvbrid function, i.e. the
subtraction of the send audio from the receive audio. The input and caller audio
signals are converted from analog to digital. Then they are manipulated in the
digital domain to verv effectively remove the announcer audio from the caller
output while maintaining natural, simultaneous tull-duplex conversation. Finally,
the signals are returned to analog. The digital approach assures consistently good
trans-hvbrid loss regardless of varving phone line impedance.
The hybrid performs its functions automatically. When a call 15 initiallv
established. a briet mute “adapt period provides an opportunity tor the svstem to
set up to the line before the call goes on the air. The caller hears a "noisy tone”
but none ot this tone is heard on the air since the output 1s muted during, this time.
This has the incidental benetit of removing the line switching “clunk.” Adaption
to the telephone line characteristics continues as the conversation proceeds using
voice as the driving signal.
Telos ONE-x-Sxx Rev. C INTRODUCTION
3
4
1.2.1 SPECIAL HYBRID FEATURES
The Telos ONE-x~5Six incorporates sophisticated audio processing in the digital
domain for gain control and filtering.
* A digital high-pass filter is used to reduce hum and other low frequency
interference. High frequency noise above the telephone frequency range is
also attenuated.
* Smart digital automatic gain control smooths input and output levels. A
noise-gate/downward expander 1s provided on the receive path to reduce
phone line noise during caller pauses.
* A switchable override function is provided to allow ducking of the caller
while the announcer is speaking. The override function includes an acoustic
ducker which dynamically reduces send audio when caller audio is present
in order to reduce feedback and aid natural conversation.
* A unique feedback reduction function uses pitch-shifting to prevent
feedback buildup. The input (send) audio is shifted downward in frequency
bv 4 Hz.
» Front panel metering is provided for input level, output level, and gain
reduction.
The process of analog-to-digital and digital-to-analog conversion is critical to
audio quality and hvbrid performance. The Telos ONE-x-Six uses integrated
circuits called CODECs for the analog-to-digital and digital-to-analog
conversions. These ICs are better than the usual telephone CODECs because thev
can use oversampling and digital tiltering techniques for the anti-aliasing and
reconstruction filters rather than the usual switched-capacitor filter approach.
Thus noise and distortion are quite good.
Telos ONE-x-Sx Rev.C INTRODUCTION
SECTION 2
INSTALLATION
2.1 CONNECTION TO TELCO LINES
2.1.1 THE CENTRAL OFFICE CONNECTION
Telco lines are brought into the ONE-x—Six with standard RJ11C cables. Plug the
Telco lines directly into the appropriate modular receptacles on the rear panel.
The red /green (inner) pins of the modular receptacles make the telco connection,
while the yellow /black (outer) pair is used as a loop-through for connection to
another phone system or PBX (as described below). Therefore, vou should be sure
that no unintended connections are made to the yellow /black pair. If vour phone
installer provides vour individual lines on Rj11C jacks, vou should have no
problem simply running the cables between those jacks and the back of the
ONE-x-Six.
Note that the ONE-x-Six should be used with loop-start phone lines (the
standard, most common sort).
JUMPER %
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SPLIT 66 BLOCK
Telos ONE-x-Six Rev. C
INSTALLATION
МЕ! ENGIN à FROM TELCO DEMARC
— UNE : RINCOUT ! TO PBX TRUNK INPUT
<— NETA NU FROM TELCO DEMARC
— UNE S AINGOUT! TO PBX TRUNK INPUT
REPEAT FOR AS MANY LINES
Az D "ISSARY
2.1.2 INTEGRATION WITH ELECTRONIC PHONE SYSTEMS
Three approaches are described. Each offers specific advantages and
disadvantages.
A. Using the ONE-x-Six “behind the PBX”
In this manual, we refer to anv phone system other than the ONE-x-Six as a PBX
(Private Branch Exchange). This is generally the station office phone system,
whatever its configuration.
Most of the electronic PBXs have ports intended for standard single-line phones as
well as for the fancy feature phones. Since these ports look like Central Office
lines with ring voltage, talk batterv and the like, thev can be connected as inputs
to the ONE-x-Six, just as a CO line would. For instance, this scheme allows the
studio phones to access WATS lines, make in-station calls, and take calls that
come in through the switchboard. The phone people refer to this concept as “using
the Kev (the Telos) behind the PBX.”
Within this general concept, there are three approaches to consider:
Behind the PBX Approach #1 is to segregate the studio lines to the
ONE-x-Six only, bypassing the electronic system altogether. An extension
or two off the electronic svstem would allow airing of calls received on the
station's main switchboard, local in-station calls, etc. If calls need to be
answered oft-air, such as for a talk show “screener,” a standard telephone
set is used, which plugs into the ONE-x-Six.
Studio lines
from Telco > — to Switch Console(s)
ONE-x-Six
— to screenerphone
One or two "Sımp:e" phone ports from PBX
to ONE-x-Six aliow PBX extensions on
the air studio system.
Business lines
from Telco № Electronic PBX system |
To electronic
PBX phone sets
>
Behind the PBX Approach #1: Segregate Studio and Business Lines
Telos ONE-x-Six Rev. C INSTALLATION 7
Studio lines
from Telco
Business lines
from Telco
Behind the PBX Approach #2 is to route all of the lines through the
electronic system. With this approach, the trunks assigned for on-air use
can be programmed in the PBX as “multiple appearances” to ring on the
analog ports the ONE-x-Six is using, as well as on certain PBX phones
programmed for these lines. Once programmed correctly, these lines can be
answered by the PBX phone or the ONE-x-Six. It may be possible to allow
the PBX phones to have the lines ring to them only, when call screening is
necessary on these phones. Once screened, the call can be transferred to the
ONE-x-Six analog ports. Use the auto-answer function (described below)
so the caller can get music-on-hold after being transferred to the on-air
system. When call screening is not required, the calls can be auto-
transferred to the air studio, usually by programming a “set busy” feature
key on the PBX phone. This is especially useful when the AUX PHONE
port of the ONE-x-Six is used for a second hybrid. (A full discussion on
how to set up a second hybrid is in Section 2.3.2 A).
The Telos ONE-x-Six has an Auto-Answer function, which can be enabled
from a button on the Switch Console. When the system is in the auto-
answer mode it will automatically seize lines that are ringing in (after
about two rings) and place them on hold. This may be of use if you choose a
direct-forwarding method of call screening. See Section 2.4 for information
on activating the Auto-Answer feature.
> to Switch Console(s)
Electronic PBX system > ON E-x-S IX
> to screenerphone
All studio lines are directly forwarded
or “private-lined" to PBX extension ports
which then appear on the ONE-x-Six
To electronic
> PBX phone sets
Behind the PBX Approach #2: Route all Lines Through Electronic System
8 Telos ONE-x-Six Rev. C INSTALLATION
The disadvantages of this approach are:
Audio degradation may result. Analog systems are often noisy or frequency
response limited. Often, the main problem is that the data signals
crosstalk into the audio path. Most digital systems have poor audio
quality verging on unacceptabilitv for on-air broadcast. See our Telos
Telephone Q & A for a discussion of this problem.
Cost. You need both input (central office) ports and output (extension) ports for
each of the studio lines. This can get very expensive because you'll need
two kinds of ports for each line, not to mention the cost of having someone
come and reprogram the PBX.
Reliability. You now have two svstems which could screw up. Blame and
finger pointing could result in the event of a system failure.
Hybrid performance may worsen somewhat since you are throwing another
impedance bump into the talk path.
The ONE-x-Six uses loop drop detection to release lines that have been on
hold when the caller gets tired of waiting and hangs up. Your analog ports
must generate a loop drop if a held call hangs up. Otherwise, when the
talent goes to that line, dial tones or reorder tones will be there, or, worse
vet, the “please hang up now “ message!
Behind the PBX Approach #3, an easv wav for both svstems to talk to each
other, is to get Centrex® service from vour phone company. Centrex®
allows vou to transfer lines to other Centrex? lines using hook-flash and
2, 3, or 4 digit “extension” numbers. This wav vou can keep on-air lines and
business lines separate, but still be able to send calls from the air studio to
the business PBX and send calls from the PBX to the air studio. Call vour
local phone representative for more details on Centrex®.
B. Looping through the ONE-x-Six
This approach uses the ONE-x-Six> YI, Bk router) pair on the CO line modular
connectors to loop through to vour PBX. Once connected to the PBX, all lines can be
shared between svstems. If a line is seized on the PBX, the ONE-\-5Six detects
loop current and will light the appropriate button on the Switch Console. The
ONE-x-Six cannot access any line that has been seized by the PBX first See
Section 2.4 on how to disable this option .Anv line seized by the ONE-x-Six will
disconnect the tip /ring loop-through pair awav trom the PBX so that on-air calls
Telos ONE-x-Six Rev. C INSTALLATION 9
cannot be disturbed by other phone users.
The ONE-x-Six knows when a line is off-hook on the PBX because each line has
current sensing circuitry. Thus, the bar LED line status indicator on the Switch
Console will be illuminated continuously (indicating a simple off-hook). If the
PBX puts a line on hold, the ONE-x-Six will still keep the bar LED line status
indicator illuminated continuously, since it can't differentiate electrically
between talking and being “on hold.” (The “talk” and “hold” circuits both draw
loop current!) Once again, the ONE-x-Six cannot access any line that has been
seized by the PBX first. See Section 2.4 on how to disable this option .Use a 66-
block and punch down the Yl/Gn/Rd/Bk wires for each line to make
interconnection easy. Refer to the diagrams on the next page for details.
10 Telos ONE-x-Six Rev. C INSTALLATION
Studio lines . — > to Switch Console(s)
from Telco | ONE-x-Six
# to screenerphone
LOOP-THRU ON
YL/BK PAIR
TO PBX
Electronic PBX system |->
Business lines
from Telco
Looping CO lines through the ONE-x-Six to the PBX
CO LINES IN
ma mm | <&—— LINE 1 TIP IN
<= ее | < UNE 1 RING IN) FROM TELCO DEMARC
—— = | —P NE 1TIPOUT
Sh mmm | —— LINE | RING Sut! TO PBX TRUNK INPUT
Fg Sma — jem wen | << UNE 2 TIP IN
<< т — << LINE 2 RING N} FROM TELCO DEMARC
BR == | gp UNE > ANC OUT) TO PBX TRUNK INPUT
JUMPER RD| EAE EE TEE aE _
CLIPS GN mes sass oa Se REPEAT FOR AS MANY LINES
YL | mm um oem au S NECESSARY
CAN BE ВК) анна mom oan sam A -
REMOVED до] com mem sem
YL | ma coms mess sess
BK| soem wom ome sees
SPLIT 66 BLOCK
Using a split bo-block to wire the ONE-x=Six's loop through
Telos ONE-x-Six Rev. C INSTALLATION 11
12
C. Yet another approach - simple paralleling
If supervision is not required, the Telco line may be simply paralleled to the PBX
and the ONE-x-Six. Keep in mind that the Telos ONE-x-Six will NOT know
when shared lines are off-hook or on hold from the other PBX (nor will the PBX
know what the ONE-x-Six is doing). This mav cause unintended interruption of
calls on the air, calls being screened, and so forth.
2.2 AUDIO CONNECTIONS
MIX-MINUS
The ONE-x-Six audio input should be fed mix-minus audio. That is, the mix of all
the sources you want to feed the phone minus the hybrid output itself. The sources
that feed the mix-minus bus should be pre-fader, so that they are always feeding
the hybrid and so the operators can't upset the send level to the hybrid.
Increasing the send level beyond a normal meter reading does not increase the
level into the phone line, due to internal, digital limiting of the hybrid! Refer to
Section 2.5.2 on how to set the send level to the hybrid.
There are a number of ways to create a mix-minus feed.
Simple Mix-Minus
For the simplest installation, vou can just take the patch send or preamp output
from the mic channel to feed the hybrid. This works well, but doesn’t have much
flexibility.
Another approach which allows more control is to use an outboard mixer to
combine sources as desired. All of the desired sources are paralleled into the on-air
board and the mixer and the mixer’s output feeds the hvbrid.
Sophisticated Mix-Minus
Most modern broadcast consoles have provisions for mix-minus. The best allow
selective teeds to the telephone svstem. This is usetul since vou sometimes want
only one mic feeding the phone, sometimes vou want three or four mics (during the
morning show, for instance), and sometimes vou want to feed cart machines when
callers need to hear and react to contest effects, etc. The diagram that follows
illustrates in simplitied form a portion of a broadcast console with a mix-minus
bus.
Telos ONE-x-Six Rev. C INSTALLATION
o > À
>>" |:2
LINE
CHANNELS x
A A в
y
PROGRAM OUT
PHONE
CHANNEL oT } PROGRAM
ONE-x-Six
Output input ll}
Simplified mix-minus scheme
While on the subject of consoles and mix-minus, we'll digress here for a moment.
Many hybrid installation problems are caused by an inadvertent signal path
which creates a loop from the hvbrid’s output to its own input. Some console
designs allow this to happen when certain control combinations are user-selected.
This is the first place to look when strange or erratic performance is experienced.
The ONE—x-Six’s front panel input meter should give vou an immediate answer.
A Good Idea...
Here's a neat scheme for stations which do a lot of taping of calls for later plav on
the air. The mix-minus goes into the left channel of the studio tape machine,
while the right channel input gets the hybrid output. The result is a two-track
tape with the announcer and caller audio separated. When vou plav back on the
air, vou set the console input to mono and adjust the relative balance as desired.
You also have a tape with caller and announcer audio separated, which makes it
easier to do production tor contest squeals, etc. If vou onlv have mono tape decks,
use the second output of the hybrid in the MIX position. See Section 2.2.3 on the
second output.
Telos ONE-x-Sx Rev. C INSTALLATION 13
2.2.2 INPUT AUDIO CONNECTION
The input has the following characteristics:
* Active balanced.
* Switch out = LINE position: -24 to +12dBv level.
* Switch in = MIC position: -68 to -35dBv level.
* Approximately 2KQ impedance.
* Pin 1 is ground and pins 2 & 3 are the balanced audio inputs.
SWITCH
CONSOLES к5232 CO LINES IN
Unbalanced sources may be used by connecting pins 1 & 2 to the source ground while
the signal hot is connected to pin 3.
2.2.3 OUTPUT CONNECTIONS
There are two separate and independent active differential audio outputs each
with the following characteristics:
* Active balanced. If an unbalanced output is required, connect between ground
and either of the hot pins. Do not ground the unused hot pin.
* Output level will varv from approximately -20dBm to +10dBm depending
upon gain control adjustment, caller level and whether or not the AGC is
engaged.
* Pin 1is ground. Pins 2 and 3 are the balanced signal outputs.
Note that the output level meter is before the gain control; it displays actual
phone level before processing. Use the output trimmer on the front panel to adjust
the level to your mixing board.
OUTPUT
Caller-onlv audio appears on this male XLR.
14 Telos ONE-x-Six Rev. C INSTALLATION
AUX/MIX OUT
The AUX/MIX output is either a mix of the send and caller signals or an isolated
second caller-only output, depending on the setting of the switch to the right of
this male XLR.
«Switch out = mixed caller and send signal is present.
Switch in = caller-only audio is present.
The input is passed to the MIX output at unitv gain. Note from the block diagram
below that the pass-through gain is not affected bv the input or output gain
controls. However, since the output gain control does affect the caller level in the
mixed output, it can be used to adjust the balance between the send and caller
signals.
CDAD — >
a Mx Select HYBRID and
: PROCESSING : 9
#
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we Nu — ``
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Telos ONE audio block diagram
2.3 OTHER REAR PANEL CONNECTIONS
in addition to the six RIT1C modular jacks marked 1-0 under CO LINES IN and the
hybrid XLR connectors as already described, the rear panel of the ONE-x-Six has
three more RJ11C modular jacks, another temale XLR, one male DB-9 connector, one
temale DB-9 connector and the AC receptacle.
Telos ONE-x-Six Rev. C INSTALLATION 15
16
2.3.1 AUX PHONE
The RJ11C jack labelled AUX phone is used for a standard, single line telephone.
(These phones are sometimes referred to as “2500” sets. They are the type of single
line phone you find practically everywhere at rather moderate cost.) Generally,
this phone is used for call screening and other off-air conversations. Standard two
(or four) conductor modular cables are required.
The bottom row of LINE buttons on the Telos Switch Console serves as the line
selector. Lines must be manually selected each time the phone is taken off-hook. If
screening is taking place outside the air studio, vou will have to acquire another
Telos Switch Console.
Telos does not provide an AUX phone with the ONE-x-Six. We recommend that
you use a high quality instrument for this application.
SECOND HYBRID (OPTIONAL)
The ONE-x-Six allows you to connect a second, external hybrid for conferencing.
When a second hybrid is used, caller-to-—caller gain is improved, reducing the
likelihood that your conferenced callers will have problems hearing each other.
For your second hybrid, we recommend our Telos ONE or Telos 100 Delta digital
hybrid telephone interface be used. (Did you expect us to recommend otherwise?)
There are three ways to use a second hybrid with the One-x—Six:
A. Connection to ONE-x-Six with control from Switch Console
The second hybrid is connected to the AUX phone connector on the back of the
ONE-x—Six. All six lines can now be routed to the external hybrid by pressing the
bottom row of buttons (formerlv the screener buttons) on the Switch Console.
Installation requires a standard two or four wire RH11C cable. Simply run the cable
from the ONE-x-Six’s AUX phone connector to the LINE connector on the hybrid.
To control the second hybrid trom the Switch Console, follow the instructions
found in sections 2.3.6 and 2.4 of this manual to give the external hvbrid its correct
on/off control. Then, set up the hybrid according to the instructions in its manual.
When a second hybrid is connected through the ONE-x-Six, however, most caller
screening capabilities are compromised. It is possible to work around this problem
bv using a single line phone looped through the second hvbrid and taking care not
to accidentally put the caller on the air during screening (this is done most easily
bv breaking the connection to the external hvbrid's on/off control signals;
Telos ONE-x-Six Rev. C INSTALLATION
however, once a call is established on the external hybrid, you won't be able to
screen calls!). Alternately, the second hybrid’s console fader can be put into cue
mode for screening (as long as the input to the hybrid is switched, too!). See
Section 2.1.2 for a discussion regarding “Behind the PBX Approach #2. This may
offer some insight on system configuration.
B. Loop through a single, ONE-X-Six line
The second hybrid can be looped through one of the lines connected to the
ONE-x-Six. Consider the second hybrid as an external phone system and install as
instructed in section 2.1.1. This allows vou to use all of your phone lines normally
when only putting one caller on the air. When you want to conference in a special
guest, dial-out on the line with the second hybrid, and then, instead of putting the
guest on the air from the ONE-x-Six, use the second hvbrid. Take care not to select
the line a second time from the ONE-x-Six.
This method retains your screening capabilities, but you cannot turn the second
hybrid on and off from the ONE-x-Six without giving up the functions of some of
the special function buttons on the Switch Console. We recommend renaming the
DELAY DUMP and RECORD STOP buttons “Guest On” and “Guest Off” and use the
appropriate pins on the REMOTE connector. See sections 2.3.6 and 3.2.6.
C. Stand-alone second line
Use an additional phone line separate from the lines connected to your
ONE-x-Six. This will allow vou to install the hybrid as a separate “system.” Use
this phone line exclusively for guests and do not publish the phone number:
This method retains vour screening capabilities, but vou cannot turn the second
hvbrid on and off from the ONE-x-Six without giving up the functions of some of
the special function buttons on the Switch Console, as described above. See sections
2.3.6 and 3.2.6.
Note: When using two hybrids, you must have two mix-minuses. (See section
2.2.1.) After establishing what console audio you want to feed to the callers, use
external equipment ( and the second output of our hybriuts) to create a mix-minus
for the internal hybrid that includes the desired console audio plus the output of
the second hybrid. Conversely, the second hybrid requires a mix-minus consisting
of the desired console audio plus the output of the internal hybrid. You may want
to draw out the signal path ahead of time to make certain that neither hybrid is
being fed its own audio.
Another note: For best operation, feed the outputs of the two hybrids to two
Telos ONE-x-Six Rev. C INSTALLATION 17
different console inputs. This gives you complete control over the relative mix of
the two callers and helps to avoid mix-minus problems.
2.3.3 SWITCH CONSOLES
The two center modular connectors are for Switch Consoles or console mounted
control surfaces. Plug vour Telos Switch Consoles or consoie panel into either of
these jacks (they are in parallel) using the six-conductor cord provided. You must
use 6-wire modular cables for the console connection; standard 4 wire cables will
not work. The cables that come with the Switch Consoles are labeled indicating
which end should be connected to the Switch Console and which is connected to
the ONE-x-Six. See the Appendix of this manual for more information on how
the modular cables are wired.
Each ONE-x-Six is capable of powering a total of two drop-in console panels or
desktop Switch Consoles. (Switch Console powering capacity is reduced to one if
vou use the earlier metal-cased Switch Consoles instead of the one packaged with
your ONE-x-Six.) An external Local Power Supply mav be used if more panels
and/or consoles are desired. Installation of the Local Power Supply is detailed in
the Appendix of this manual.
The maximum cable length from the ONE-x-Six to the desktop control surfaces is
100". The Switch Console has local regulation, so cable voltage drop will not affect
illumination until the drop-out point is reached. The drop-in console panels will
work at a maximum distance of 25’, owing to the greater voltage drop caused by
the power consumption of the incandescent lamps used in these panels. If greater
distances are required, use a Local Power Supplv. Installation of the Local Power
Supply 15 detailed in the Appendix of this manual.
A 25' cable to connect the ONE-x-Six to a Switch Console comes packaged with
the unit. Cables of other lengths can be made from components available from
telephone suppliers. If you are making your own cable, be certain the cables’ two
plug tabs are on the same side of the cable as smeara op the diagram In the
7
Appendix. Note that this causes a reversal of the pro co Ei TO end,
The Section 3.2 has details on operation ot the Switch Console.
CONSOLES RSX?
PROGRAM-ON-HOLO
18 Telos ONE-x-Six Rev. C INSTALLATION
2.3.4
2.3.5
2.3.6
PROGRAM-ON-HOLD INPUT
This is a female XLR connector for your music or program to be fed to callers that
are on hold. It is an active, balanced, 10KQ input that will accept program levels
from -20dBm to +4dBm. An AGC circuit maintains consistent levels to callers on
hold for any input level within this range. The front panel Program-On-Hold
Level LED indicates the presence of input. There is no gain control since the AGC
has a verv wide range to accommodate whatever level vou might have.
RS-232
Using a male DB-9, this is the standard AT-stvle RS-232 serial port. Telos’ Call
Screen Manager software, designed for producer-to-talent communications, utilizes
this port. Section 3.4 of this manual covers R5-232 application and has details on
the pin-out, data protocol, etc. A null-modem cable works fine to connect the
ONE-x-Six to vour PC.
P3 - RS-232 Connector Pin-Out
2 RX (Receive from computer to Telos)
3 IX(Transmit from Telos to computer)
5 GND (Ground)
4 DTR (Indicates when Telos is transmitting - usually not required)
REMOTE
This is a female DB-9 connector which provides the user buttons’ control outputs.
All outputs are momentary open-collector closures to ground. These will require a
weak pull-up resistor to +5VDC. Some equipment (like our hvbrids) have pull-ups
built into their control inputs. Check the device's manual to be sure. The pin-out 1s
detailed below.
Remote Pin-Out
Delav Dump Lser Vutputc
Not currently supported
Hybrid 2 (external) ON
Hybrid 2 (external) OFF
External STOP when internal hvbrid turned OFF
Ground
Record Start
Record Stop / User Output E
External START when internal hvbrid turned ON
LL 00 1 Li UN Aa Là lv —
Telos ONE-x-Six Rev. C INSTALLATION
19
20
All outputs are momentary open-collector closures to ground. Each output can sink
up to 250 mA. For these outputs the maximum pull-up voltage is +45V. If these
outputs are to drive inductive loads a back-EMF diode is built in, so none is
from J4-x —e>
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The external stop and start (pins 5 and 9) are controlled by the top row of LINE
buttons on the Switch Console. When a line is selected to be put on-air, the
external start can be used to start or reset a timer or any other application vou
wish. When a line is dropped, the stop function allows the timer to be stopped.
The Hybrid 2 (external) ON and OFF (pins 3 and 4) are controlled by the bottom
row of LINE buttons on the Switch Console and are used when a second, external
hybrid is installed in the “Aux Phone” port. When a line is selected to be put on
the air, Hybrid 2 will turn ON. When a line is dropped or held, Hvbrid 2 will tum
OFF. Dip Switch #6-2 must be turned on to activate this function. (See Section 2.4.)
The diagram below shows how to connect the remote connector of the ONE-x-5ix
to either the Telos ONE or Telos 100 Delta digital hvbrid telephone interfaces.
ONE-x-Six's
DBA
"REMOTE"
(gnd)
(#2 off!
wl Ho
122 om
1 410
Telos ONE-x-Six Rev. C
INSTALLATION
Hybrid #2 =
Telos 100 DELTA or Telos ONE
PINOUTS for DBS
"REMOTE"
2.3.7 AC RECEPTACLE
2.4
The AC receptacle connects AC to the unit with an industry-standard IEC connector
and provides a power on/off switch. The power supply inside the ONE-x-Six has
a universal AC input, accepting an input range of 90-264VAC, 50-60Hz. A fuse is
located on the power supply.
INTERNAL DIP SWITCHES
The ONE-x-Six has two 2-position DIP switches and one 4-position DIP switch to
enable options. These switches are shipped from the factory in the OPEN position
for default operation. The software incorporates the following functions:
Dip #5-1 - “Locked-on” Conferencing
OPEN: The factory setting for this DIP Switch is OPEN, so that the
“locked-on” conferencing feature is active. (See Section 3.2 for details on
this feature.) Double-pressing any LINE button on a Switch Console or
console mounted control surface will lock the line on, and the LED
indicator will stop flashing and remain lit.
ON: This will deactivate the “locked-on” conferencing feature. Double-
pressing any LINE button will not lock the line on, nor will the LED
indicator stop flashing and remain lit. If anv other LINE button is pressed,
the previous line will be dropped. HOLD and DROP will function
normally.
Dip #5-2 - FLASH/NEW and AUTO-ANSWER
OPEN: This is the factory default setting and will make the button third
from the left below the LINE buttons of a Switch Console the
FLASH/NEW button. All lines that are seized on the internal hvbrid will
be broken for 500 millisecond (locked-on or not). Used tor PBX or Centrex
phone lines which require this for feature access. Also useful tor dropping
a line when a wrong number 15 dialed or it many calls are to be made on the
same line.
ON: Activates the Auto-Answer feature. When lines ring into the
ONE-—x-Six, thev will automaticallv be answered and placed on hold.
Once on hold, the callers will hear vour Program-On-Hold source. This
feature is useful in some applications where there is no one screening, calls,
in distance learning, and in teleconferencing. The third button from the left
Telos ONE-x-Six Rev. C INSTALLATION
21
22
below the LINE buttons of the Switch Console will turn this feature on and
off. If you are using a console mounted control surface, refer to the manual
for the panel for information on how to toggle this feature.
Dip #6-1 - Tone or Pulse Dialing
OPEN: This is the factory default and causes the phone pads on any
Switch Consoles and console mounted control panels connected to the
ONE-x-Six to dial out using DTMF Touch Tones®.
ON: This causes the phone pads on anv Switch Consoles and console
mounted control panels connected to the ONE-x-5ix to dial out using
“rotary pulses.” The cadence of the pulses is 10 Hz with a break/make
ratio of 2:1. Time between digits dialled is 700 msec.
Note: The DTMF Touch Tones® or rotary pulses send by a telephone set to
the ONE-x-Six via the “Aux Phone” port will pass through the system
and cannot be affected by this switch.
Dip #6-2 - Optional Second hybrid control
OPEN: This is the factorv default which disables the external hybrid
on/off control (pins 3 & 4 on the “Remote” connector). Any lines seized on
the bottom row of the Switch Console, in fact, will be routed to the “Aux
Phone” port, where the screener phone is. When the screener puts lines on
hold with the bottom row’s HOLD button, thev will go to “Screened
Hold.”
ON: This enables the external hybrid on/otf control (pins 3 é 4 on the
“Remote” connector). 1f a hybrid is connected to the “Aux Phone” port, anv
lines seized on the bottom row of the Switch Console will go to the
external hvbrid. Pins 3 & 4 on the “Remote” connector should be connected
to the hvbrid's on/otf control pins. Lines put on hold trom the bottom rows
HOLD button will now go to regular “Hold” inst 213f Screened Hold ”
Refer to section 3.2 for more details.
Dip #10-1 - “ELSEWHERE" override option
OPEN: This is the factory default which prevents lines from being seized
bv the svstem whenever thev are off-hook via the loop-through (refer to
manual Sections 2.1.2B and 3.4.2 tor details on the "ELSEWHERE" state).
Telos ONE-x-Six Rev. C INSTALLATION
ON: This enables a user override of calls that are in the “ELSEWHERE”
state. A line will go into this state whenever the line is active on the
loop-through of that line (refer to your manual Sections 2.1.2B and 3.4.2).
The console displays lines in this state by dimly lighting the BAR LEDs
on both rows. When DIP SW 10-1 is off, lines in this state will be “locked
out” and will not be allowed to interrupt the loop-through call in progress.
When DIP SW 10-1 is on, lines in this state can be selected on either row of
the console. This may be useful for those who use their PBX phone(s) to
screen calls, when the lines are looped through the ONE-x-5ix to the
station PBX.
Dip #10-2 -Not currently enabled.
Dip #10-3 -Not currently enabled.
Dip #10-4 -Not currently enabled.
2.5 FRONT PANEL GAIN ADJUSTMENTS
2.5.1
There are two screwdriver-adjustable multi-turn trimmers recessed from the front
panel, marked IN and OUT. These trimmers are used to set send (audio signal
going down the phone line to the caller) and receive (audio output of the hybrid,
i.e. caller audio) levels, respectively.
INPUT GAIN
The trim pot marked IN adjusts the audio level that is being sent to the hvbnd’s
input XLR , which should be a mix-minus feed. (See Section 2.2.3 for a discussion of
mix-minus). The unit comes from the tfactorv with the trimmer tullv
clockwise-that is, all the wav up! Follow these steps to adjust the IN trimmer:
DJ
foo
Press the G/R - LEVEL button so it is in the OUT position; press the
IN/OUT button so it 1s in the IN position. This makes the LED meter read
INPUT LEVEL.
Select MIC or LINE level range by pressing the switch located to the right
Of the input XLR on the rear panel.
Feed some audio at a normal level into the mix-minus bus. This can be a
microphone, a tone generator, or a cart or CD plaving vour favorite tunes.
Look at the meter and begin turning the IN trimmer counterclockwise with
a small screwdriver until most of the green LEDs are lit and the red LED
only comes on everv once in a while during peaks in the audio. Adjusting
this level is just like setting the level to a tape deck. You wouldn't peg the
meters on a tape deck, would vou?
Telos ONE-x-Six Rev. C INSTALLATION
23
24
IMPORTANT NOTE: Increasing the send level beyond the “0” reading does NOT
increase the level into the phone line. The level of the audio sent down the phone
line is part of the digital signal processing and is set to provide the maximum
level permitted. Due to the internal, digital limiting action of the hybrid
excessive input level may cause unwanted aliasing distortion and poor adaption!
2.5.2 OUTPUT GAIN
The trim pot marked OUT adjusts the audio level that is being sent from the
hybrid's output XLRs to vour console. This trimmer changes both outputs the same
amount. Once again, the unit is shipped with this trimmer fullv clockwise— turned
all the way up. Follow these steps to adjust the OUT trimmer:
1.
J
Press the G/R - LEVEL button so it is in the OUT position; press the
IN/OUT button so it is in the OUT position. This makes the LED meter
read OUTPUT LEVEL. The meter is reading caller audio level on the
phone line before the output trimmer. A “0” reading corresponds to an
approximately -15dBm phone level. This can tell you if your phone line
level is acceptable. The meter will not change as you adjust the output
trimmer.
Connect one of the hybrid’s outputs to a line-level input on your mixer and
set the mixer's meter to read that input's level.
Select a line on the top row of the Switch Console. This will bring dial
tone to that fader. Run the fader up to a normal gain level.
Look at the meter on vour console and adjust the output trimmer on the
ONE-x-Six with a small screwdriver so that the console's meter reads
approximately +3dB. (Dial tone is tvpicallv a few dB hotter than most
callers.) If vou can’t get enough level out of the hvbrid, press the button on
the front panel marked AGC so it is in the IN position and readjust the
trimmer. Or, if vour console tader has a gain adjust on its input, increase
gain there.
Repeat step 4, onlv this time call a friend and have him read the
Gettysburg Address or vour favorite poetry while vou adjust the trimmer.
Try this several times on different lines to ensure vou have good range
with the big fader. Once again, don’t peg the mixer> meters!
Telos ONE-x-Six Rev. C INSTALLATION
2.6 INSTALLING SWITCH CONSOLE BUTTON LEGENDS
The LINE buttons are labeled bv inserting a legend under a clear lens. When
changing the button legend, place the entire button capon a flat surface, and then
remove the clear lens. This will prevent damage to the button and the lens. Avoid
installing legends with the buttons installed in the Switch Console as the
pressure required to for cap installation may damage the button mechanism.
Buttons already installed in the Switch Console are removed by caretul lifting.
No special tool is required. Gentle prving with vour fingernail or thin blade 1s all
that is required to remove the clear lens.
Telos includes a sheet of common legends which may be cut and placed into the
appropriate LINE button caps. You can even make vour own legends quite easily.
Imprinted button caps are provided for the function buttons. If vou have dedicated
a function for which an imprinted button cap is not provided, vou may use one of
the extra LINE button caps provided with your own legend inserted. LINE buttons
and function buttons (with the exception of the NEXT button) have
interchangeable caps.
Telos ONE-x-Sx Rev. C INSTALLATION 25
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SECTION 3
OPERATION
3.1 FRONT PANEL CONTROLS AND INDICATORS
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28
3.1.1 LINE STATUS LEDS
When a telephone line is in use, the front pane! LED indicator corresponding to
that line will illuminate and blink different cadences to indicate that line's
status. These cadences differ from those of the Switch Console.
Very Slow Blink: Line is Busied Out
Slow Blink: Line is Ringing In
Very Fast Blink: Line is On Hold
Very Fast Double Blink: Line is On Screened Hold
Medium Blink: Line is Off Hook but not On-Air
On Continuously: Line is On-Air
Off Continuously: Line is On Hook And Inactive
3.1.2 PROGRAM-ON-HOLD LEVEL LED
This indicator will illuminate when audio is present at the Program-On-Hold
input.
3.1.3 METERING
The meter mode pushbuttons select the desired function:
* Input level
* Input gain reduction
* Output level
* Output gain reduction
[he input level metering is after the input gain control and displavs vour mix-
minus level to the hvbrid.
The output level meter is placed betore the output gain control. This is done so that
the level may be adjusted to accommodate the equipment downstream of the
hybrid without affecting the Telos” meter level. Note that when the AGC is
switched out, the meter reads the telco line level and thus mav be used to
determine if there is a phone line level problem. The meter's “0” indication
Telos ONE-x-Six Rev. C OPERATION
3.1.4
corresponds to a phone line level of approximately -15dBm.
When viewing input gain reduction the meter will only have one or two LEDs lit.
As the meter moves to the left, it indicates input gain reduction; when it moves to
the right, it shows input gain expansion. Input AGC is always active.
The output gain reduction meter is only active when the AGC button is pressed in,
since this button turns the caller AGC on and off. Its display functions just like the
input gain reduction meter.
OUTPUT PROCESSING: OVERRIDE
This pushbutton engages two independent functions: the caller ducking and the
acoustic ducking function. In most broadcast applications, you will find that
engaging the override funchon results in better overall performance.
Caller Ducking
This function operates in the caller audio path. When active, there is
approximately 6dB of ducking applied to the caller audio when the announcer
speaks. However, very little change in caller level will be noticed due to the very
high speed operation of the duck function and the masking provided by the
presence of the send audio.
The purpose of this function is twofold:
e Aesthetic Preference. Manv air talents prefer the effect of having some
control over the caller when thev speak.
* Improvement of “dvnamic” trans-hvbrid Loss.
Acoustic Ducking
This function operates in the send audio path. The acoustic ducker works bv
reducing the send (announcer) signal dvnamically when the caller speaks.
The acoustic ducker 15 a used to prevent feedback when open speakers are being
used to monitor callers. Also, since an open monitor causes callers to hear
themselves ted back via the acoustic path from the speaker to the announce mig,
this function has the additional benetit ot allowing the caller to perceive a more
natural sounding conversation.
The time constant 15 verv fast, so the ettect of the acoustic ducking usually is not
noticed bv the caller. The onlv disadvantage might be that the announcer mav be
less able to break in on a caller who is insisting upon shouting on.
Telos ONE-x-Six Rev. C OPERATION
29
30
3.1.5
3.1.6
OUTPUT PROCESSING: AGC
The telephone dynamic gain processing is enabled with this pushbutton. The
output processing includes both an automatic gain control and a smart noise
gate /downward expander function.
0
Compression
Región
-10 Linear
Region
-20
Relative
Output -30
Level (dB) ~
Expansion
Region
40
-50
£0
-70 -60 -50 -40 -30 -20 -10 0
Phone Line Level (dBm)
As can be seen in the graph which shows the relationship between telco line level
and the Telos ONE output level, the AGC maintains a constant output level when
the phone line level varies between approximately -30 and OdBm. Below
approximately -48dBm, a gentle noise gate/downward expander operates to
reduce residual hybrid leakage and phone line noise.
According to AT&T statistical studies ot the USA telephone network, the average
level found on standard phone lines is -16dBm. In our experience high-volume
“Choke network” lines generally have poorer levels
HYBRID STATUS
These LEDs indicate whether the internal hvbrid is ON or OFF. Indication ot
which phone lines are active to the hvbrid can be seen on the Switch Console as
well as the front panel's line status LEDs.
Telos ONE-x-Six Rev. C OPERATION
3.1.7 GAIN CONTROLS
These recessed trimmers adjust the send and receive levels. Refer to section 2.4 for
many more details.
3.2 THE SWITCH CONSOLE
3.2.1 GENERAL
The Switch Console is the primary user interface. It provides pushbuttons for line
selection and control, a “tone dialing” pad, and buttons for special functions that
ease and enhance call-in programming.
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Telos desktop Switch Console: Top row selects calls to go to air,
bottom row selects calls for off-air screening via a standard telephone.
The Switch Console communicates bv sending and receiving serial data over a
“skinnv wire” data link. The Switch Console sends data to the ONE-x-5ix when a
kev press occurs and receives commands trom the ONI a-Si to Huminate the
appropriate LEDs as determined by the ONE-—-5ix"s software.
When the Switch Console 15 first plugged into the ONE-x-Six, its indicator LEDs
will at first all be illuminated and then will be retreshed to the current system
and phone line status.
Telos ONE-x-Six Rev. C OPERATION 31
32
3.2.2
3.2.3
LINE
TOUCH TONE® PAD
A standard keypad is provided so that outgoing calls may be placed from the
Switch Console. The actual DTMF Touch Tones® are generated internally by the
ONE-x-Six. An internal DIP switch in the ONE-x-Six, described in Section 2.4,
allows pulse dialing where Touch Tone® dialing is not available.
A standard kevpad is provided so that outgoing calls may be placed from the
Switch Console. To dial out through the internal hvbrid, select an available line
on one of the top row’s LINE buttons and dial. If you want to place a call on the
auxiliary phone and there is no second hybrid connected, pick up the handset,
select an available line on the bottom row of line buttons, and dial using the dialer
on the phone. If a second, external hybrid is connected, select an available line on
one of the LINE buttons on the top row and dial; once vou're done dialling, press
the line button directly below the line button you selected to dial out with to
transfer the call to the external hybrid.
LINE BUTTONS AND LED INDICATORS
Operation for line selection, holding, etc. is very similar to familiar key phone
sets. The maximum number of lines is six. The top row of LINE buttons corresponds
to the internal hybrid. The bottom row connects lines either to the screener phone
or, if connected, an external hybrid. Either or both rows can be disabled via a DIP
switch inside the console. Refer to the Appendix for details.
There are two LEDs above each line selection button to indicate status of each of
the phone lines and hybrids you have connected to the ONE-x-Six.
Buttons
Each row of LINE buttons has a DROP button, a HOLD button, and ten LINE
selection buttons. Since the Switch Console included with the ONE-x-Six is
identical to the unit used with our larger svstems, the last four buttons on each row
will be inactive vw hen using the ONE x-Six. During t-taDation, up to six phone
lines mav be connected to the ONE x-Six. The DROP and HOLD buttons aftect
only the row of LINE buttons on which thev are located. The top row routes phone
lines to the internal hvbrid; the bottom row routes calls to the external “Aux
Phone” port on the rear panel ot the unit. All phone lines appear in the same
relative positions on both banks. Each bank works independently of the other.
Telos ONE-x-Six Rev. C OPERATION
Red Bar LED Indicator
Above each line selection button is a bar LED to indicate line status. LINE status
can be affected by pushing a LINE button on the Switch Console, by a computer
command to the RS-232 input, or from an external phone system connected to the
ONE-x-Six. The bar LED will therefore always reflect the true LINE status.
Information is provided by both the flash rate of an LED and its brightness.
Red Bar LED Status LINE Status
Slow Blink Line Is Busied Out
Medium Blink: Line Is Ringing In
Very Fast Blink: Line Is On Hold
Very Fast Bright Blink: Line Is On Screened Hold
On Continuously: Line Is on-air (or on screener phone)
Off Continuously: Line Is On Hook And Inactive
Yellow Round LED Indicator
Above each line selection button is a round LED to indicate hybrid status
Yellow Round LED Status Hybrid Status on Indicated Line
Blinking on-air, standard mode
On Continuously on-air, conference mode
Off Continuously Not on-air or being screened
A quick run through the various line statuses will familiarize you with what each
blink rate looks like and really means.
3.2.4 PLACING CALLERS on-air
Placing Callers on-air in Standard Mode
Tov place a caller on-air, push the desired LINE button on the top row. The round
LED will tlash and the bar LED will be lt continuoushy. The line may be dropped
or placed on hold using the DROP and HOLD buttons on the row vou have selected.
If vou select another line on the same row, the line selected eartier will be
dropped unless the line 1s placed in conference mode.
Telos ONE-x-Six Rev. C OPERATION 33
34
Placing Callers on-air in Conference Mode
3.2.5
Pushing a LINE button once will seize the phone line associated with that button.
Pressing the LINE button a second time will place that line in the conference mode.
This is indicated on the Switch Console as BOTH LEDs lit continuously. The
DROP and HOLD buttons will have no effect on any line in conference mode. If
another line is selected on the same row, the line in the conference mode will
remain on the air. When the LINE button is selected a third time, the LINE
reverts to the standard mode (round LED blinking again, bar LED lit continuously)
and the DROP and HOLD buttons of that row will affect that line as expected.
While the system software allows all of the lines to be conferenced together,
caller-to-caller gain may be insufficient when there are fewer hybrids in the
system than active callers.
The ability to place lines in conference mode may be disabled by a DIP switch
inside the ONE-x—Six. See Section 2.4 for details.
Tips for Conferencing
If you want to keep a caller on-air and add more callers, put the original caller in
conference mode to avoid accidentally hanging up on him/her.
The system allows you to have more than one caller on the internal hybrid. To
accomplish this, place a caller in the conference mode and then select one or more
callers from the top row of LINE buttons on the Switch Console. This is called
“hard mash” conferencing. When performing this “button mashing” your callers
mav not hear each other verv well.
If vou have a second, external hvbrid installed, select vour first caller from the
top row of the Switch Console and the second caller from the bottom row. A DID
switch inside the ONE-x-Six must be set. See Section 2.4 tor details.
SCREENING CALLERS
It a single-line desk phone 15 connected to the “ALX PH OX; port, the bottom rom
on the console must be used to select lines tor screening. The buttons on the bottom
row function exactly like the top row’s, except that when the HOLD button is
pressed, the line will go to SCREENED HOLD. The blink rate is the same as
regular hold but brighter. When lines are in screened hold thev go into the NEXT
button’s cue. See section 3.2.6. It DIP 6-2 is on, the HOLD button will put the line in
regular hold and the line will not go into the NEXT buttons cue. See section 2.4.
Telos ONE-x-Six Rev. C OPERATION
3.2.6 SPECIAL FUNCTION BUTTONS
There are six special function buttons below the line selection buttons. From left to
right, these function buttons are:
NEXT
Puts the line that has been in SCREENED HOLD the longest to air through the
internal hvbrid. If no lines are in SCREENED HOLD, it selects the line that has
been ringing in the longest. This function is frequently used for contests, when the
svstem is in the auto-answer mode, or if your week-ender jocks need a simple wav
to use the system. If no calls are in SCREENED HOLD or RINGing in when the
next button 1s pressed, the line that Is on-air (and not locked in) will release.
BUSY ALL
With the first press ot this button, all lines that are neither in use nor on hold are
made busy. On the second press, those lines are dropped. This function is helpful
in preventing callers from jamming your phone lines just prior to your accepting
calls for a contest.
The LED above BUSY ALL is normally lit. When the BUSY ALL button is pushed,
this LED will blink. All of the LEDs above the LINE buttons for lines that have
been busied will flash with a unique cadence. When the BUSY ALL button is
pushed the second time, LED status reverts .
Creating a Custom Busy Pattern
By default, all lines are busied. However, it is possible to create a custom pattern
ot fines to be busied. First, enter the special busy set-up mode bv pressing in
seguence: [-]][=](£][BLSY ALL]. The LED above the BUSY ALL kev will flash.
Select the lines vou want to be busied bv togueling the fine buttons on the top row.
Ant fine can be added or removed trom the busy funcion by pressing its button
azar When vou have the pattern that vou want press ee el ALL bey aoa
to leave the special set-up mode Thee sottw are wold 0 cour set-up antl its
reprogrammied.
FLASH/NEW or AUTO-ANSWER
The FLASH NEW button 15 primarily tor use with PEN or Centrex: telco lines
which require tlashine to aucess features. Dressing it causes à 500 millisecond
= A
interruption on ant 20fr» Les.
Telos ONE-x-Sx Rev C OPERATION
CD
36
The FLASH /NEW button can also be used for a dropping a line - that is, to hang-
up a line and get dial tone back on the selected line without going through the
usual OFF and LINE button press sequence. This button is useful for dropping a line
when a wrong number is dialed or if many calls are to be made on the same line.
The function of this button, third from the left, mav be changed by a DIP switch
inside the ONE-x-Six. (See Section 2.4.) Once enabled, the AUTO-ANSWER
feature is toggled when the console auto-answer button is pressed. The enabled
condition is indicated by the LED above the button flashing. When enabled, the
system automatically answers lines that ring into the ONE-x-5ix (after about two
rings) and places them on screened hold. Once the line is connected to the hold
circuit, the callers will hear your Program-On-Hold source. This feature is useful
in some applications where there is no one screening calls, in distance learning, and
in teleconferencing.
RECORD MODE
The record mode enables you to conveniently start and stop a tape recorder which
is being used to record telephone calis. To ready the RECORD MODE, push the
button once. The LED above the button, normally on continuously, will blink. The
next time you press a LINE button to select a call to air, the RECORD START
output on the Control connector on the back of the ONE-x-Six will be pulsed. (See
Section 2.2.) This output can be used to start the recording device. The RECORD
STOP output is pulsed when the DROP or HOLD buttons are pressed and no lines
are active on the hybrid (i.e. not in conference mode). To tum off the RECORD
MODE, press its button again.
RECORD STOP
When this button is pushed, the RECORD STOP output on the Control connector on
the back of the ONE-x-Six will be pulsed. (See Section 2.2.) This does not disable
the RECORD MODE, but , rather, can stop the tape deck if vou choose not to record
the call anvmore. This output can be used to stop a recording device or for any other
desired function, like turning oft a single-line external hvbrid, starting a
dedicated “station 1.0.7 саг! machine and so torth.
DELAY DUMP/USER BUTTON
This button provides a pulse closure to ground on the DELAY DUMP /USER output
Of the Control connector on the back of the ONE-x-Six. (See Section 2.2.) This mav
be used to control a delav svstem or for anv other desired tunction, like turning on a
single-line external hvbrid, starting a dedicated “station |.D." cart machine etc.
Telos ONE-x-Six Rev. C OPERATION
3.2.7 CHANGING BUTTON LEGENDS
3.3
The LINE buttons are labeled by inserting a legend under a clear lens. When
changing the button legend, remove the entire button cap, place the cap on a flat
surface, and then remove the clear lens. This will prevent damage to the button
and the lens. Buttons are removed by careful lifting. No special tool is required.
Gentle prying with vour fingernail or thin blade is all that is required to remove
the clear lens.
Telos includes a sheet of common legends which may be cut and placed into the
appropriate LINE button caps. You may create your own legends quite easily.
Imprinted button caps are provided for the function buttons. If you have dedicated
a function for which an imprinted button cap is not provided, vou may use one of
the extra LINE button caps provided with your own legend inserted. LINE buttons
and function buttons (with the exception of the NEXT button) have
interchangeable caps.
CONSOLE MOUNTED CONTROL PANELS
Telos provides console and turret mounted panels for a variety of models from
several major broadcast manufacturers such as Pacific Recorders & Engineering.
These panels operate in a manner very similar to the desktop Switch Console. For
more details on their operation and installation, refer to the manual included
with the unit vou purchased.
aana
ONO
DO) -
CUT TI TE
Cl LE LEE TE
Telos ONE-x-Six Rev. C OPERATION
37
38
3.4
3.4.1
3.4.2
RS-232 SERIAL PORT
The RS-232 serial port can be used for computer control of the telephone svstem.
Full status and control are available via this port. The communication protocol is
very simple and should be accommodated easily with any computer /software
system. Please let us know what you come up with!
Telos Call Screen Manager is an elegant software package implementing the
ONE-x-Six’s line status information from its RS-232 port. Other third-partv
vendors also have software designed specifically for use with the ONE-x-Six.
La Mame Mark Bogner
ТИ Trim 1» Palma
3 10 Tub yxeoet Ki~eball
Messages То The Talent 1
Host Screen of Call Screen Manager
PORT CHARACTERISTICS
The port connector is a standard IBM AT-stvle male DB-9. Cables mav be easily
tabricated or mav be obtained from a well-stocked computer store. The phvsical
protocol is as follows: 8 bits, 1 Stop Bit, No Parity, 1200 Baud.
P3 - RS-232 Connector Pin-Out
5 IX (Transmit from Telos to computer)
2 RX {Receive trom computer to Telos)
5 GND (Ground)
+ DIR (Indicates when Telos is transmitting - usually not required)
DATA PROTOCOL
Computer-to-Telos Commands
All commands are ASCII characters so that anv terminal program such as
Crosstalk for the PC or Red Ryder for the Mac may be used to exercise the port.
Telos ONE-x-Six Rev. C OPERATION
Each command begins with a capital letter and is followed by a 2-digit line
number (XX) where appropriate. Line numbers begin with Line #1 = 00.
OFF XX
ON XX
HOLD XX
SCRNED HOLD XX
CONF XX
LOCK XX
TONE XX
QUERY XX
UXX
Xternal
Reset Xtermal Mode
Monitor
Don't Monitor
Initialize
2
Turns line XX off.
Turns line XX on to the main bank.
Puts line XX on hold.
Puts line XX in “screened hold” mode.
Tums line XX on to the “Aux Phone” port.
Equivalent to switch console “double press.”
Dials tone XX to on-air line. 11 = *; 12 = #.
Causes Telos to return line status in format given below.
Virtual press of function button on console.
BUSY -> DELAY / DUMP = U00 -> UG4. NEXT = U05.
Causes all function keys to transmit to computer onlv - the
functions are not actually performed unless the computer
echoes them. This permits the buttons to be used for
various computer-related functions, or for computer
intelligence to intervene in their processing. This command
must be sent in intervals of one minute to maintain the
mode; the ONE-x-Six will revert to normal mode after
time-out to prevent problems with computer being turned -
off, etc.
Function keys back to normal operation.
Causes Telos to return line status in format given below
whenever any line status changes. Replies with:
Line monitor ON.
Turns monitor mode off. Replies with:
Line monitor OFF.
Sets all lines to off, etc.
Returns a status screen. Primarilv tor debuggine, testing,
etc.
The bold and underlined letter in each command is the only one which is sent. Line
numbers must be padded - that is, thev must alwavs be two digits. Be sure to send
CAPITAL letters!
Telos ONE-x-Six Rev. C OPERATION 39
40
Examples:
To puta line 1 on hold, send “H00”
To request line 5 status, send “Q04”
To place in monitor mode, send “M”
Telos-to-Computer Commands
The line status is returned from Telos to the computer in the following format: a
capital letter indicating the status followed by two digits indicating the line
number.
OFF XX Indicates line XX is off.
ON MAIN XX XX Indicates line XX is active on the internal hybrid.
HOLD XX Indicates line XX is on hold.
SCREENED HOLD XX Indicates line is in “screened hold” mode.
CONF XX Indicates line XX is active on the “Aux Phone” port.
BUSIED XX Indicates line XX has been “busied-out.”
ELSEWHERE XX Indicates line XX is on “elsewhere.” (Detected from loop
current).
RINGING XX Indicates line is ringing-in.
U Indicates press of function button on console.
BUSY -> DELAY/DUMP = U00 -> U04. NEXT = U05.
3.5 FEEDBACK CONTROL
Sometimes, even with the exceptional trans-hybrid loss produced by the digital
process, trouble with feedback mav occur when the svstem is being used with an
open speaker. Generally, this happens onlv with poorer phone lines, or with very
weak callers requiring lots of gain in the phone-to-speaker path.
Some suggestions for solution of this problem:
1. Enable the OVERRIDE function.
2. When mic processing Is being used, connect the hybrid input in such a
wav that it gets the unprocessed mic signal. The problem here is that the
mic processing combines with the ONE-x-Six> digital hybrid input ACC
(alwavs active) to increase gain in the feedback path when no announcer
audio is present. Depending on the mic processor, the feedback margin
could be reduced by manv dB. The hvbrid AGC has a smart adaptive gate
to prevent inappropriate gain increase, but it is thwarted bv additional
processing. If it is not possible to wire around the processing, trv to set the
Telos ONE-x-Six Rev. C OPERATION
mic processing gate function so that the gain is not “sucked-up” during
pauses. You might also try reducing the input level to the hybrid. The send
level will still be OK, since the AGC has considerable range, but the
system won't have as much room to reach for gain. In some difficult cases,
it may be desirable to disengage the hybrid output AGC function since it
could reduce feedback margin in the same wav input AGC does.
3. Try repositioning the mics and /or speaker. Of course, it also helps to use
mics and speakers that are directional.
4. Add equalization to the monitor path. Acoustic resonances usually cause
pronounced peaks in the “feedback response” of a sound system. Since the
largest peaks generally occur at just a few frequencies, reducing svstem gain
at these frequencies with a graphic or notch EQ helps tremendously.
5. If necessary, soften acoustic reflections in vour studio by adding curtains
or wall treatment.
The foregoing is intended to help in those situations where vou must have an open
speaker. Whenever possible, it is best to use headphones to hear callers. When
you have an open speaker, the on-air phone audio has both a direct and an
acoustic path - from the speaker to the announce mic(s). Depending on the relative
levels, phone audio quality may suffer.
Generally, the best scheme is to have the phone monitor speaker mute when the
mic 15 turned on. If you have the announce mics active to the phone system input
even when the mic channel is switched off, the svstem can still be used like a
speakerphone when taking calls off the air. When the call is to be used on-air, the
announce mike 15 On, so the speaker is muted.
Telos ONE-x-Sx Rev. C OPERATION
41
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SECTION 4
TROUBLESHOOTING
44
4.1 PHILOSOPHY
In the past few years, the nature of broadcast engineering has changed
considerably. At many stations, the engineering staff has been reduced in size and
new responsibilities have been added. At the same time, equipment has gotten
more complicated and specialized. Thus, many practitioners of the broadcast
electronic arts are forced to become “systems” engineers, emphasizing equipment
application rather than component-level troubleshooting.
This is probably a positive development, since it really would be impossible for a
station engineer to fullv understand the internal nuances of all the wonderful new
high-tech stuff that is now available to improve station operations! Also, as
equipment becomes more sophisticated and specialized, stocking spare parts for
every eventuality has become difficult.
Thus, we at Telos don’t really expect that much component-level troubleshooting
will occur. So, to support you when you need help, we keep spare units available
for fast overnight shipping. In most cases, we will swap boards with you at no cost.
We do not charge for most repairs.
However, despite the comments above, we do provide full schematics and
component level troubleshooting information in case you have the need or desire to
tackle a repair (or modification) yourself. Another reason we provide the
information is to satisfv your curiosity. If vou are like us, you probably just have to
know what's happenin’ inside that fancy box.
4.2 GENERAL TROUBLESHOOTING INFORMATION
Desoldering
While we socket the ICs that have the greatest potential for failure, manv of the
ONE-\-5ix"s ICs are soldered in. That's because most of the time the socket is
more likely to cause trouble than the IC. This is oft no consolation when one ot the
soldered [Cs appears to have tatled. When vou need to replace a soldered in chip,
the right tool 15 essential. We use a vacuum desoldering sv>tem made bv Pace (the
MBT-100) and highlv recommend it. Cost ts about $150 - worth it it vou do much
PC board troubleshooting work. The only other real alternative is to clip the leads
from the top and remove the solder trom the holes with solder-wick. We've not
had much luck with the non-heated, manual vacuum desoldering devices like the
ones trom Radio Shack. We do not recommend that newlv-soldered connections be
defluxed.
Telos ONE-x-Six Rev.C THEORY OF OPERATION
Circuit Description Notation
Whenever a slash ( / ) is used after a signal designation in the text or on the
schematics, an active low is signified
The Microprocessors
As with most modern equipment, the Telos ONE-x-Six is based upon
microprocessor control. Please do not attempt to remove the processor from its
socket without the proper removal tool, as this may damage the socket and the
MPU itself. (Use PLCC extraction tool from Burndy, Cat. No. QILEXT-1 or
equivalent).
XLR Connectors
The XLR connectors have retaining screws which have to be turned in order to be
released. Do this as illustrated below.
XLR CONNECTOR
RELEASE:
Insert a small screwdriver into dmholes in the
connectors, shown at right. Tumthe screwdriver Release
about one eighth of a turn counter clockwise to
release the connectors. A small s crewdriver Latches
such as the Xcelite R3322 or R3324y need FEMALE XLR
to be filed down some to fit the slots.
Remember to retighten the XLR latc hes when
replacing the Telos ONE PCB. Thiswill ensure correct
support for the XLR connectors on the PCB.
MALE XLR
CAUTION
The installation and servicing instructions in this manual are for use by
qualified personnel only. To avoid electric shock do not perform any ser-
vicing other than that contained in the Operating Instructions unless you
are qualified to do so. Refer all servicing to qualified service personnel.
Telos ONE-x-Six Rev. C THEORY OF OPERATION 45
4.3 POWER SUPPLY
The power supply inside the ONE-x-Six is manufactured by Autec Power Systems
of Simi Valley, CA. This 30W switching supply (Model No. UP550-4003) has a
universal AC input, accepting an input range of 90-264 VAC (continuous), 47-
440Hz. Its outputs provides three separate voltages: a +5V supply which powers
all the digital circuits, a +12V supply for the RS-232 and the Switch Consoles,
and a -12V supply for the -V rail of the RS-232. The +12V rails also drive two
linear voltage regulators which provide +5V for the audio circuitry. A minimum
load of 0.2A on the +5V rail is required to maintain proper operation of the other
outputs. MEASURING OUTPUTS WITH NO LOAD WILL YIELD
MEANINGLESS RESULTS.
Here's a list of compliance standards for the Autec UPS65 Series:
FCC Class ‘B’ compliance
UL 1950 File No. E133148
CSA 1402C Level 3 File No. LR89164
VDE Approval to EN60950
46 Telos ONE-x-Six Rev. C THEORY OF OPERATION
SECTION 5
APPENDIX
APPENDIX CONTENTS
Hybrid Specifications
ONE-x-Six Switch Console pin-outs
RJ11C format for Telos Switch Consoles
Telos ABS Switch Console Options
Dual 10-line Panel Options
Warranty and Application Note
HYBRID SPECIFICATIONS
System
True digital. Second generation Texas Instruments TMS320C25 processor.
8kHz sampling rate. Internal digital input and output gain processing,
filtering.
Trans-hybrid Loss
>40dB with pink noise or voice as test input. Test set-up as specified in our
Telephone Q&A. All dvnamic enhancement processing is switched off.
With the override and output expander functions switched-in, trans-
hybrid loss is enhanced to >50dB.
Send Level to Phone Line
-10dBm average level. Maintained by internal digital AGC.
Frequency Response (caller to output)
200 - 3400Hz +1dB.
Noise and Distortion (caller to output)
Distortion: Typical 0.4% THD+N, measured @1kHz at any level from
48dBm to -8d Bm.
Signal-to-Noise: >72dB. Referred to 0dBm phone level.
Send Audio Input
XLR female connector. Active balanced. Accommodates -24dBm to +12dBm
levels in LINE mode; -68dBm to -35dBm in MIC mode. Front panel
screwdriver level adjust.
Caller Audio Output
XLR male connector. Active ditferential. Output levels to +14dBm
depending upon caller telephone line level and adjustment of front panel
level adjust. Will drive 6000.
Aux/Mix Output
XLR male connector. Active ditterential. In ALX mode, this output is an
isolated second output. In MIX mode, this is a combined send and caller
output. INPUT to MIX Output: Unity gain. <0.04% THD; +12dBm clip
pont.
ONE-x-Six Switch Console
Modular Connector Pin-Out (RJ11)
123456
à 2
1 +9VDC (power to Switch Console)
2 RCV (from Switch Console to ONE—x-Six)
3 XMIT (to Switch Console from ONE-x-Six)
4 Readv/Busy (low signifies Switch Console sending)
5 Ground
6 Ground
50 Telos ONE-x-Six Rev. C APPENDIX
RJ11C FORMAT FOR TELOS SWITCH CONSOLES
DO ELL LEE IIT I 11°
54321 23456
a lum
© ©
TYPICAL INPUT TERMINAL TYPICAL OUTPUT TERMINAL
6 GND Pa nara TO sw con A 1 +VDC
5 GND 2 intfc RCV
Ft LU Fak
3 SwCon RCV 4 Data Ready
2 SwCon XMT 5 GND
1 +VDC 6 GND
NOTES:
1) Connections to Switch Consoles MUST use 6-conductor, inverting cables:
I | |
| 1
п Г cosses
6 6
1 © 6 1
2) Cables to "DATA IN" or from "DATA THRU" can be 4-conductor if necessary,
but must invert the signals as shown above.
3) Maximum length from ONE-x-Six to Switch Console WITH Aux P/S is 250 ft.
Max. length WITHOUT Aux P/S is 100 ft.
4) Each Aux. Power Supply can power up to two (2) Switch Consoles.
5) 6-pos. RJ11-to-Insulation displacement converter connectors available from AMP
(P/N 553983-1; IBM equiv. 8310575). Also available from Digikey (P/N A4004-ND).
These connectors are excellent to use when trying to connect the RJ11C format to your
In-house shielded pairs. If possible, give each data signal its own shield. Shields should
be tied together and run to station ground for best results.
Telos ONE-x-Six Rev. C APPENDIX 51
TELOS ABS SWITCH CONSOLE OPTIONS
The microprocessor board for the Telos ABS Switch Console operates as a universal panel for 10-, 20-
and 30-line svstems. Specific operation is set up using a four-position DIP switch located on the MPU
board. Here is a brief description of its modes of operation.
from the factory. This setting emulates the old panel functions: 10 lines available on hybrid
D | Û i NORMAL OPERATION (all DIPs off): This is the default setting for the units when they ship
#1 (top row) and hybrid #2 (bottom row). Most users will use this setting exclusively.
M | Г i EXTENDED OPERATION #1 (DIP #1 on): This setting allows the panel to access lines 11-20
in a 20-line system. "Hold" and "Off" functions for both banks are duplicated for ease of
operation..
EXTENDED OPERATION #2 (DIP #2 on): This setting allows the panel to access lines 21-30
in a 30-line system. Once again, "Hold" and "Off" functions for both banks are duplicated for
ease of operation.
ED
EI
1A2 V8.x OPERATION #1 (DIPs #1 & #2 on): This setting must be used ONLY with a 10- or
20-line 1A2 Interface System that uses the 1A2 V8.x software. When in this mode the Switch
Console becomes a single 20-line panel. Refer to the V8.x addendum for specific details on this
special 20-line approach.
NORMAL - DISABLE TOP ROW (DIP #3 on): In this mode, the buitons on the top row are
disabled, as well as the user buttons that can affect the top row (NEXT & FLASH). This may
be useful if hybrid #1 is assigned to another studio. This option allows access to the #2
hybrid (bottom row) for lines 1-10.
EXTENDED - DISABLE TOP ROW (DIPs #1 & #3 on): In this mode, the buttons on the top
row are disabled, as well as the user buttons that can affect the top row (NEXT & FLASH).
This option allows access to the #2 hybrid (bottom row) for lines 11-20.
=
CN
ro)
M,
os | |e
ms
my
Ces; | Ce
Ns EO
S 4 EXTENDED - DISABLE TOP ROW (DIPs #2 & #3 on): In this mode, the buttons on the top
A J row are disabled, as well as the user buttons that can affect the top row (NEXT & FLASH).
This option allows access to the #2 hybrid (bottom row) for lines 21-30.
Ч.
1.23 4 1A2 V8.x- DISABLE TOP ROW (DIPs #1-3 on): In this mode, the buttons on the top row are
в A fi J disabled, as well as the user buttons that can affect the top row (NEXT & FLASH). This option
allows access to lines 11-20 when used with the TA? V8.x software.
NORMAL - DISABLE BOTTOM ROW (DIP #4 on): In this mode, the buttons on the bottom
0 0 J i row are disabled. This mav be useful if hybrid #2 is assigned to another studio. This option
allows access to the #1 hvbrid (top row) for lines 1-10.
EXTENDED - DISABLE BOTTOM ROW (DIPs #1 & #4 on): In this mode, the buttons on the
bottom row are disabled. This option allows access to the =1 hybrid (top row) tor lines 11-20.
EXTENDED - DISABLE BOTTOM ROW (DIPs #2 & #4 on): In this mode, the buttons on the
bottom row are disabled. This option allows access to the 1 Inbrad (top row) tor lines 21-30.
1A2 V8.x- DISABLE BOTTOM ROW (DIPs #1, #2 & #4 ON): In this mode, the buttons on the
N A 0 i bottomrow are disabled. This option allows access to lines 1-10 when used with the 1A2 VE. x
software.
DISPLAY ONLY (DIPs #3 & #4 on): This setting disables ALL the buttons, including the
0 0 ! i user buttons. This can be useful when, perhaps, the PD wants to see phone activity during
contests without being in the studio. DIPs #1 & #2 have no eftect in this mode.
52 Telos ONE-x-Six Rev. C APPENDIX
DUAL 10-LINE PANEL OPTIONS
The microprocessor board for the dual 10-line panels operates as a universal panel
for 10-, 20- and 30-line systems. Consoles supported include selected models from
Auditronics, Broadcast Electronics, Harrison, Neve, Pacific Recorders & Engineering,
Ward-Beck and Wheatstone. Specific operation is set up using a four-position DIP switch
located on the MPU board. Here is a brief description of its modes of operation.
E
EN
Eo
EN
no
in
A
=
—_
N
lo
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Г жа -
C
Eo
E
mE
EN
Co
ml
CC -
e
Co
EN]
no
Ww
A
-m =
(Os
Co
EN):
—.
—
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CN:
l=
MN
Co
С >
NORMAL OPERATION (all DIPs off): This is the default setting for the units
when they ship from the factory. This setting emulates the old panel
functions: 10 lines available on hybrid #1 (left side) and hybrid #2 (right side).
Most users will use this setting exclusively.
EXTENDED OPERATION #1 (DIP #1 on): This setting allows the panel to
access lines 11-20 in a 20-line system. "Hold" and "Off" functions for both
banks are duplicated for ease of operation.
EXTENDED OPERATION #2 (DIP #2 on): This setting allows the panel to
access lines 21-30 in a 30-line system. Once again, "Hold" and "Off" functions
for both banks are duplicated for ease of operation.
USER BUTTON OPERATION #1 (DIPs #1 & #2 on): In this mode, the
buttons for line 10 have been reassigned as the user buttons one would find
on the desktop Switch Console. Refer to your interface manual for details on
the user buttons. (Requires Dual 10 V1.1 software.)
SWAPPED BANK OPERATION (DIP #3 on): Dip Switch #3 reassigns the
buttons that were on the left side to the right side and visa versa. This makes
it easy for the unit to be, say, a horizontal panel or the Hybrid #1 bank on the
single-bank BE panels.
SWAPPED & EXTENDED OPERATION #1 (DIPs #1 & #3 on): Use this
setting to access lines 11-20 on a horizontal turret panel or just to swap the
banks to completely confuse vour operators.
SWAPPED & EXTENDED OPERATION #2 (DIPs #2 & #3 on): This is the
setting one would use to access lines 21-30 in a 30-line system on any
horizontal panel.
SWAPPED USER BUTTON OPERATION $2 (DIPs #1, #2 & #3 on): This
setting 1s good tor those who have a BE panel and need to use the Next
function with a Direct Interface. (Requires Dual 10 V1.1 software.)
1A2 V8.x OPERATION #1 (DIP #4 on): This setting must be used ONLY with
a 10- or 20-line 1 A2 Interface Svstem that uses the TA2 V&.x software. When in
this mode the dual 10-line panel becomes a single 20-line panel. Refer to the
V8.x addendum for specific details on this special 20-line approach.
SWAPPED 1A2 V8.x OPERATION #2 (DIPs #3 & #4 on): Once again, this
setting must be used ONLY with 1A2 Interface Systems using V8.x sottware.
Dip Switch 453 swaps the banks when using a turret panel or the single-bank
BE panels.
Telos ONE-x-Six Rev. C APPENDIX 53
WARRANTY and APPLICATION CAUTION
This Warranty covers “the Products,” which are defined as the various audio equipment, parts,
software and accessories manufactured, sold and/or distributed by TLS Corporation, d/b/a
Telos Systems (hereinafter “Telos Systems”).
With the exception of software-only items, the Products are warranted to be free from defects in
material and workmanship for a period of one year from the date of receipt by the end-user. Software-
only items are warranted to be free from defects in material and workmanship for a period of 90 days
from the date of receipt bv the end-user.
The terms and conditions of Telos Systems’ warranty in effect at the time of shipment shall apply.
In order to invoke this Warranty, notice of a warranty claim must be received by Telos Systems
within the above-stated warranty period and warranty coverage must be authorized by Telos Systems.
Notice of a warranty claim may be made orally bv telephoning Telos Systems at +1 (216) 241-7225 or in
writing sent by facsimile to +1 (216) 241-4103. If Telos Systems authorizes the performance of warranty
service and if Telos Systems will be performing the warranty service, the defective Product must be
delivered, shipping prepaid, to: Telos Systems, 2101 Superior Avenue, Cleveland, Ohio 44114, USA. It
Telos Systems authorizes the performance of warranty service and if it authorizes another entity to
perform that warranty service, the Product must be delivered, shipping prepaid, to that entity, whose
address will be provided by Telos Systems.
Telos Systems (or its designee) at its option will either repair or replace the Product and such
action shall be the full extent of Telos Systems’ obligation, and buyer's sole remedy, under this
Warranty.
After the Product is repaired or replaced, Telos Systems (or its designee) will return it to the party
that sent the Product and Telos Systems will pay for the cost of shipping.
Telos Systems will have no responsibility under this Warranty for anv Products subject to: Acts of
God, including (without limitation) lightning; improper installation or misuse, including (without
limitation) the failure to use telephone and power line surge protection devices; accident; neglect or
damage.
Telos Systems’ dealers are not authorized to assume for Telos Systems anv additional obligations or
liabilities in connection with the dealers’ sale of the Products.
EXCEPT FOR THE ABOVE-STATED WARRANTY, TELOS SYSTEMS MAKES
NO WARRANTIES, EXPRESS OR IMPLIED (INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE).
In no event will Telos Systems, its employees, agents or authorized dealers be
liable for incidental or consequential damages, or for loss, damage, or expense
directly or indirectly arising from the use of any Product or the inability to use any
Product either separately or in combination with other equipment or materials, or
from any other cause.
Telos products are to be used with registered protective interface devices which
satisfy regulatory requirements in their country of use.
54 Telos ONE-x-Six Rev. C APPENDIX
SECTION 6
SIMPLIFIED INSTRUCTIONS
THE SWITCH CONSOLE
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TOUCH TONE® PAD
A standard keypad is provided so that outgoing calls may be placed from the
Switch Console. To dial out through the external hybrid, select an available line
on one of the LINE buttons on the top row and dial. If you want to place a call on
the auxiliarv phone and there 1s no second hvbrid connected, pick up the handset,
select an available line on the bottom row of line buttons, and dial using the dialer
on the phone. If a second, external hvbrid is connected, select an available line on
one of the LINE buttons on the bottom row and dial.
LINE BUTTONS AND LED INDICATORS
Operation for line selection, holding, etc. is very similar to familiar kev phone
sets. The maximum number ot lines is six. The top row ot LINE buttons corresponds
to the internal hybrid. The bottom row to the connects lines either to the screener
phone or, if connected, an external hybrid. Either or both rows can be disabled via
a DIP switch inside the console. Reter to the Appendix tor details.
There are two LEDs above each line selection button to indicate status ot each of
the phone lines and hvbrids vou have connected to the ONE-x-Six.
LINE Buttons
Each row of LINE buttons has a DROP button, a HOLD button, and ten LINE
selection buttons. The last four buttons on each row are inactive. The DROP and
HOLD buttons affect only the row of LINE buttons on which they are located.
Red Bar LED Indicator
Above each line selection button 1s a bar LED to indicate line status. LINE status
can be affected by pushing a LINE button on the Switch Console, a connected
computer, or an external phone svstem connected to the ONE-x-Six. The bar LED
will therefore always reflect the true LINE status.
Information is provided by both the flash rate of an LED and its brightness.
Red Bar LED Status
Slow Blink:
Medium Blink:
Very Fast Blink:
Very Fast Bright Blink:
On Continuouslv:
Off Continuously:
Yellow Round LED Indicator
LINE Status
Line Is Busied Out
Line Is Ringing In
Line Is On Hold
Line Is On Screened Hold
Line Is on-air (or on screener phone)
Line Is On Hook And Inactive
Above each line selection button is a round LED to indicate hvbrid status
Yellow Round LED Status
Flashing
On Continuously
Off
Hyb. Status on Indicated Line
on-air, standard mode
on-air, conference mode
NOt on-air
Placing Callers on-air in Standard Mode
To place a caller on-air, push the desired LINE button on the top row. The round
LED will flash and the bar LED will be lit solid. The line may be dropped or
placed on hold using the DROP and HOLD buttons on the row you have selected. If
vou select another line on the same row, the line selected earlier will be dropped
unless the line is placed in conference mode.
Placing Callers on-air in Conference Mode
Pushing a LINE button once places it on-air. Pressing the LINE button a second time
will place that line in the conference mode. The DROP and HOLD buttons will
have no effect on a line in conference mode. If another line is selected on the same
row, the line in the conference mode will remain on the air. When the LINE button
is selected a third time, the LINE reverts to the standard mode.
Tips for Conferencing
If you want to keep a caller on-air and add more callers, put the original caller in
conference mode to avoid accidentally hanging up on him/her.
The system allows you to have more than one caller on a single hybrid. To
accomplish this, place a caller in the conference mode and then select one or more
callers from the same row of LINE buttons on the Switch Console. This is called
“hard mash” conferencing. When performing this “button mashing” vour callers
may not hear each other verv well.
If vou have a second, external hvbrid installed, select vour first caller from the
top row of the Switch Console and the second caller from the bottom row.
Special Function Buttons
There are six special function buttons below the line selection buttons. From left to
right, these function buttons are:
NEXT
Puts the line that has been ringing-in the longest on-air through the internal
hybrid. If no lines are ringing-in, it selects the line that has been waiting on
screened hold the longest. This function is frequently used for contests, when the
system 1s in the auto-answer mode, or if vour week-ender jocks need a simple wav
to use the system. If no calls are in SCREENED HOLD or RINGing in when the
next button is pressed, the line that is on-air (and not locked in) will release.
BUSY ALL
With the first press of this button, all lines that are neither in use nor on hold are
made busy. On the second press, those lines are dropped.
This function is helpful in preventing callers from jamming vour phone lines just
prior to your accepting calls for a contest.
The LED above BUSY ALL is normally lit. When the BUSY ALL button is pushed,
this LED will blink. All of the LEDs above the LINE buttons for lines that have
been busied will flash with a unique cadence. When the BUSY ALL button is
pushed the second time, LED status reverts .
FLASH/NEW or AUTO-ANSWER
The FLASH/NEW button is primarily tor use with PBXs or Centrex™ telco lines
which require flashing to access teatures. Pressing tt causes a 300 millisecond
interruption on anv active lines.
The FLASH NEW button can also be used for a dropping line that is, to hang.
up a line and get dial tone back on the selected line withornt ong through the
usual OFF and LINE button press sequence. This button is usetul for dropping a line
when a wrong number is dialed or if many calls are to be made on the same line.
This button can also be used to toggle on and off the Auto-Answer feature. When
enabled, the system automatically answers lines that ring into the ONE-x-Six
(after about two rings) and places them on hold. Once on hold, the callers will
hear vour Program-On-Hold source.
RECORD MODE
The record mode enables you to conveniently start a tape recorder. To ready the
RECORD MODE, push the button once. The LED above the button, normally solid,
will blink. The next time vou press a LINE button, the RECORD START output on
the Control connector on the back of the ONE-x-Six will be pulsed. To turn off the
RECORD MODE, press its button again.
RECORD STOP
When this button is pushed, the output on the back of the ONE-x-5ix stops vour
recording device. This does not disable the RECORD MODE, but, rather, can stop
the tape deck if you choose not to record the call anymore. Your engineer mav have
assigned another function to this button.
DELAY DUMP/USER BUTTON
This button activates your external profanity delav. Your engineer may have
assigned another function to this button.
SECTION 7
PARTS LISTS and
SCHEMATICS
PARTS LISTS
ONE-x-Six
1. Complete Parts List — 65
Switch Console
2 Central Processor Unit 67
3. Actuator Board 68
4 DTMF Board 68
SCHEMATICS
ONE-x-Six
Telco Detect Circuits
MOH w/ AGC Schematic
Tip /Ring Routing and Control Schematic
Microprocessor Section Schematic
Hybrid Microprocessor Schematic
Phone and Control Schematic
Input and Output Audio Schematic
Switch Console
мои комн
8. Central Processor Unit Schematic
9. Actuator Board Schematic
Telos ONE—-x-Six
PARTS LIST
Designation
U1
U2
U3
U4
US
U6
U7
U8
Description
DSP Microprocessor 320C25
27C292-3JL EPROM
27C292-3]L EPROM
74 AC244
74HCT374
74ACT138
watchdog DS1232
74HC590
74HC390
Sarorux NCHO80C-40Mhz osc
74HCT04
AMD7901CPC CODEC
AMD7901CPC CODEC
2912A filter
NE5532 op-amp
NE5532 op-amp
NE5532 op-amp
Microprocessor 80C188
PPI 8255
Dual UART Z85C30-10PC
SRAM 6264LP-10
SmartSocket® DS1213
EPROM 27C512-25
74HC573
71ACTISS
DTMF gen. TP5088
quad RS-232 receiver MC 1489
quad RKS-232 driver MC 1488
LM65321 audio amp
NE5532
TPIC6259 by T1
TPIC6259 by TI
TPIC6259 by TI
LC403 AGC
ТР1С6259 by TI
NE5532
NE5552
HCPL2731 dual optoisolator
TPIC6259 by TI
Designation
Ul
U2
U3
not socketed
not socketed
not socketed
not socketed
not socketed
not socketed
not socketed
not socketed
U12
U13
U14
U15
not socketed
not socketed
U18
U19
U20
U21
not socketed
U22
not socketed
not socketed
L235
U26
Lar
L?8
L29
LAN
L
L
T
=
э го —
U34
not socketed
not socketed
101-61
‘т
37
Description
68-pin PLCC socket
24-pin DIP machined socket
24-pin DIP machined socket
28-pin DIP machined socket
28-pin DIP machined socket
16-pin DIP machined socket
8-pin DIP machined socket
68-pin PLCC socket
40-pin DIP machined socket
40-pin DIP machined socket
28-pin DIP machined socket
28-pin DIP machined socket
14-pin DIP machined socket
14-pin DIP machined socket
14-pin DIP machined socket
8-pin DIP machined socket
not socketeu
20-pin OP machined socket
20-pin DIP machined socket
20-pin LIP machined socket
l6-pin DIP machined socket
20-pin DIP machined socket
S-pin DIP machined socket
20-pin DIP machined socket
Telos ONE-x-Six Rev. C PARTS AND SCHEMATICS
63
Designation
R1
R2
R3
R4
К5
Кб
К7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R22
R23
R24
R25
R26
R27
R28
UD A ANO SAO
WL LI Y» Lo Y Y Y N
> сл фо) п) = О сб
A
J
~J
R38
R39
R40
R41
64
Description
3.3KQ/1%
15KQ
10KQ
1KQ
5620/1%
4.99KQ/1%
10KQ
10KQ
10052
33.2KQ/1%
10KQ
10KQ
1KQ/1%
1KQ/1%
1KQ/1%
1KQ/1%
100KQ/1%
100KQ/1%
1KQ
2.43KQ
10KQ
49.9Q/1%
49.90 /1%
10KQ
56:2KQ/1%
1KQ
7.3K9
49.90 / 1%
49.952 / 1%
TORO
10KQ
TUKO
TOKOQ
47.50 /1°0
47.50 /1°0
not stuffed
not stuffed
47.50 /1%
47,50 /1%
17.582/ 1%
47.552 / 1%
Designation
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R66
R67
1R1-6R]
1R2-6R2
IR3-6R3
1R4-6R4
1R5-6R5
IR6-5R6
TFI-AF]
RP]
RPP
RP3
RP4
RP5
RP6
RP7
RPS-RP15
Telos ONE-x-Six Rev. C PARTS AND SCHEMATICS
Description
47.5Q/1%
47.5Q/1%
511Q2/1%
15KQ
1KQ/1%
10K©
10KQ
2KQ
2KQ
1.5KQ
18.2K0/ 1%
82.5KQ/1%
39.2KQ/1%
221KQ/1%
39.2KQ2/1%
10KQ
10KQ
30.1K82/ 1%
IMQ
1MQ
2.21KQ/ 1%
22.1KQ/1%
13.3KQ/1%
10KQ
10KQ
220KQ
1500
1500
2.21KQ/1%
47.50. 15.
1000
TKOx 0 SIP
10K€2 x 6 SIP
68082 x 0 SIP
Designation
C1
C2
C3
C4
C5
Сб
C7
C8
Description
0.01uF 50V mono
0.01uF 50V mono
0.1 Farad Gold Cap
22pF 50V mono
2000pF 50V mono
2000pF 50V mono
0.01uF 50V mono
4.7uF /25V tant
1.7uF/25V tant
0.01uF 50V mono
0.01uF 50V mono
22pF 50V mono
22pF 50V mono
220pF 50V mono
2.2uF/25V tant
4.7uF/25V tant
4.7uF/25V tant
0.ILF 50V mono
0.1uF 50V mono
0.1uF 50V mono
0.1uF 50V mono
1000pF 50V mono
not stuffed
not stuffed
jumpered
4./uF/25V tant
1uF 50V mono
(L001UF 50V mono
0.1uF 50V mono
220pF 50V mono
2.2uF/25V tant
2.3uF /25V tant
2.2uF 25V tant
СНЕ 25\ tant
1ЮрЕ 50\ mono
10uF 725V tant
4.7uF/25V tant
0.IuF 50V mono
0.1uF 50V mono
ОДНЕ 50V mono
0.145 50Y mono
1000pF 50V mono
Designation
C43
CH
C45
C46
C47
C48
C49
1C1-6C1
1C2-6C2
D1
D2
D3
D4
1D1-6D1
1D2-6D2
1BR1-6BR1
Q1
Q2
L1
L?
L3
L4
L5
L6
L7
L&
La
L10
Ll]
LI?
LIS
[14
115
\ К!
\ №
171-671
71
172-672
72
Telos ONE-x-Six Rev. C PARTS AND SCHEMATICS
Description
1uF/25V tant
0.1uF 50V mono
0.01uF 50V mono
0.01uF 50V mono
0.01uF 50V mono
10pF 50V mono
100pF 50V mono
0.47uF 250V film
47uF/10V tant
1N4730 3.9v zener
1N4730 3.9v zener
1N4148 or 1N914
1N4148 or 1N914
15V zener 1N4744
rectifier 1N4004
bridge rectifier 2W04M
p-channel JFET J176
2N3906 pnp
Green LED LTL-1234A
Green LED LTL-1234A
Green LED LTL-124A
Green LED LTL-1234A
Green LED LTL-1234A
Red LED LTL-1224A
Red LED LTL-1224A
Green LED LTL-1234A
Green LED LTL-1234A
Green LED LTL-1234A
Green LED LTL-1234A
Green LED LTL-1234A
Green LED LTL-1234A
Green ! ED LTL-1244
Yellow LLL LIL-1254A
LMT905 > reg
LM SOS -S4 rec
varistor S14K175
varistor S14K250
Varistor 57 K25
varistor $7 K25
65
Designation Description Designation Description
И Neutrik NC3FDHBAG XLR female RF1 RF filter 27K51R1-05
J2 Neutrik NC3MDHBAG XLR male RF2 RF filter 27K51R1-05
J3 Neutrik NC3MDHBAG XLR male RF3 RF filter 27K51R1-05
J4 DB-9 female RF4 RF filter 27K51R1-05
JS DB-9 male RF5 RF filter 27K51R1-05
J6 dual six-pos. RJ12
7 dual six-pos. RJ12 P1 10K rt angle multitum trimpot
J8 dual six-pos. RJ12 P2 10K rt angle multitum trimpot
J9 Neutrik NC3FDHBAG XLR female
10 single six-pos. RJ12
J11 dual six-pos. RJ12 Y1 18.452MHz XTAL
J12 4-pos. locking header for P/S Y? 3.579MHz XTAL
SW1 Alt action switch 1K1-6K4 AT&T solid state switch LH1503AB
SW2 Alt action switch 1K1-6K4 8-pin DIP machined socket
SW3 Alt action switch 1T1-6T1 MOH audio xfrmr SPT- 2105
SW4 Alt action switch T1 Prem #SPT110 xfmr
SW5 2-pos. DIP sw.
SW6 2-pos. DIP sw.
SW7 2-pos DIP sw
SW8 Alt action switch
SW9 Alt action switch
SW10 4-pos. DIP sw.
66 Telos ONE-x-Six Rev. C PARTS AND SCHEMATICS
Telos Switch Console
CPU BOARD PARTS LIST
Designation
Ul
U2
U3
U4
U5
U6
U7
U8
U9
P1
P2
VRI
VR2
Y1
C1
C2
C3
C4,C5
C6-C9
C10,C11
C12-C14
C15
C16-C18
Description
87C51
74HC244
74HC04
UDN2540B
UDN2540B
UDN2580A
DS1232
MC1489
LT1280
28-pin male header
6-pin male header
78ST105HC
78ST105HC
9.216 MHz XTAL
1000uF E 25V electr.
100uF € 25V electr.
1uF @ 35V tant.
22pF mono
lur e 35V tant.
1luF mono
0.01uF mono
0.1 Farad Gold Cap
O0.1uF mono
Designation
Ul
U7
US
UY
R1-R6
R7
R8
RP1
RP?
RP3
RP4
RP5
FB1-FB3
D1
D2
D3
SW1
Description
40-pin machined socket
20-pin machined socket
14-pin machined socket
16-pin machined socket
16-pin machined socket
18-pin machined socket
&-pin machined socket
14-pin machined socket
18-pin machined socket
470 1/4 W
68KQ 1/4 W
39KQ 1/4 W
4.7Q2 x 7 DIP
10KQ x 10 SIP
10KQ x 6 SIP
100KQ x 10 SIP
1KQ x 8 SIP
ferrite bead
1N5339B
1N4148
1N4148
4-pos DIP switch
Telos ONE-x-Six Rev. C PARTS AND SCHEMATICS
67
Telos Switch Console
ACTUATOR BOARD PARTS LIST
Designation
SW1-SW30
SW1-SW30
L2-L11
L2-L11
L15-L27
L13-L27
L28-L37
L38-L47
1
J2
J3
И:
Description
T-16D switch
T-16 dust cover
L-424YTD 3mm LED
1/16" spacer
L424Y 1D 3mm LED
1/16" spacer
L-153SRDT retangular LED
L-153SRDT retangular LED
28-pin header
6-pin header
55-6566 RJ11C
7-pin header
Telos Switch Console
DTMF BOARD PARTS LIST
Designation
SW1-SW12
DTMF cap set
68
Description
T-16R switch
Swaps “0-977 TR ep”
Designation
SW1
SW2
SW3-SW12
SW13
SW14
SW15-5W24
SW25
SW26
SW27
SW28
SW29
SW30
Designation
fl
Telos ONE-x-Six Rev. C PARTS AND SCHEMATICS
Description
Sw Cap “ DROP”
Sw Cap “HOLD”
Sw Cap replaceable legends
Sw Cap “DROP”
Sw Cap “HOLD”
Sw Cap replacable legends
Sw Cap “BUSY ALL”
Sw Cap “FLASH/NEW”
Sw Cap “REC MODE”
Sw Cap “REC STOP”
Sw Cap “DELAY DUMP”
Sw Cap “NEXT”
Description
7-pin header
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