Digital Telephone Hybrids
DH20/22
Digital Telephone Hybrids
Installation & Operation Manual
Perfect Communication through Technology, Service, and Education.TM
DH20/22 Installation and Operation Manual
Gentner Part No. 800-012-001
April 2000 (Rev. 2.0)
©2000 Gentner Communications Corporation. All rights reserved. Gentner Communications Corporation
reserves specification privileges. Information in this manual is subject to change without notice or
obligation.
The connection ports on the SPH10 are to be used as follows:
Power
Connection to the provided power cord
Remote
Connection to external controlling and status device(s)
Monitor Out
Connection to external speaker 8 ohm
Send In
Connection to audio output devices
Caller Out
Connection to audio input devices
Aux Out
Connection to audio input devices
Telco Line
Connection to telephone line
Telco Set
Connection to telephone set
This equipment complies with the requirements of the EU guidelines:
89/336/EEC
73/23/EEC
1999/5/EC
“Electromagnetic Compatibility”
“Electrical operating material for use within specific voltage limits”
“Radio Equipment and Telecommunications Equipment”
Conformity of the equipment with the above guidelines is attested by the CE mark.
T
able of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
What’s In This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
About the DH20/22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Front-Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Rear-Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Before You Install . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Telephone Line Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Mix-Minus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Dip Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Trim Pots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Using the Hybrid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Using the Telephone Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Switching a Call from the Set to the Hybrid . . . . . . . . . . . . . . . . . . . . .25
Switching a Call from the Hybrid to the Set . . . . . . . . . . . . . . . . . . . . .25
Disconnecting a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Placing a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Adjusting the Monitor Output Level . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Remote Control Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Recording Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
TABLE OF CONTENTS
2
Appendices
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Appendix A: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Telephone Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Telephone Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Null . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Appendix B: Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Appendix C: Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
DH20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
DH22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Appendix D: Warranty & Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
FCC Part 15 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
FCC Part 68 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
IC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
European Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
INTRODUCTION
1
Introduction
Congratulations on your purchase of the DH20 or DH22 digital hybrid.
With the variety of telephone systems in the world today, from cellular to
digital to analog, it’s increasingly difficult to have all callers sound the
same on-air. To help bring uniformity and high quality sound to a
broadcast talk show environment, we have created the DH20 and the
DH22 digital telephone hybrids. These digital hybrids provide a
telephone interface between a telephone line and audio equipment.
These hybrids use digital signal processing (DSP) technology to
continually adapt to telephone-line conditions—providing consistent
high-quality sound and send to caller separation. The DH20 is a single
digital hybrid, allowing connection of a single telephone line for on-air
use. The DH22 is a dual digital hybrid, allowing the connection of two
telephone lines for on-air use. When connected in accordance to
United States, Canada, the United Kingdom, and mainland Europe
compliance standards, the digital hybrids are perfect for your telephone
application.
This manual gives installation, set up, and operation instructions and
helps you resolve technical problems, should any arise. For more
information, please contact Gentner Communications. We welcome
and encourage your comments so we can continue to improve our
products and serve your needs.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
3
INTRODUCTION • WHAT’S IN THIS MANUAL
4
What’s In This
Manual
The manual is divided into the following sections:
Overview summarizes the main capabilities of the DH20/22, along
with the pre-installation site requirements.
Installation explains how to connect DH20/22 cables and how calibrate the different controls on the unit.
Operation describes how to use the front panel controls to connect
and disconnect calls, switch calls to and from the hybrid, and use the
remote control option.
Appendices include DH20/22 specifications, connector pinouts, and
detailed warranty and compliance information.
Technical
Support
Technical Support
For additional help on how to install, set up, operate or to obtain repair
procedures and schematics for the DH20/22, please contact Gentner
technical support.
Telephone:
Fax:
E-mail:
Web site:
1.800.283.5936 (USA) or 1.801.974.3760
1.801.974.3638
tech1@gentner.com
www.gentner.com
Sales and Customer Service
Telephone:
Fax:
E-mail:
1.800.945.7730 (USA) or 1.801.975.7200
1.800.933.5107 (USA) or 1.801.977.0087
bcastinfo@gentner.com
Gentner Communications Corporation
1825 Research Way, Salt Lake City, UT 84119
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
INTRODUCTION • UNPACKING
5
Unpacking
Ensure that the following items were received with your shipment:
DH
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Digital Hybrid
20
or
Digital Hybrid
DH
Hybrid 1
12-foot Modular
Telephone Cable
Part 830-000-012
4 Rack Mount Cups
Part 684-400-001
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AC Power Cord
Part 699-150-006
XLRs
1 male, 1 female
Parts 664-600-003
and 664-500-003
22
DH22
Part 910-012-001 (Domestic)
Part 910-012-003 (Pan European)
Part 910-012-004 (Australian)
DH20/22
DH20
Part 910-012-101 (Domestic)
Part 910-012-103 (Pan European)
Part 910-012-104 (Australian)
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Hybrid 2
Digital Telephone Hybrid
DH20/22 Installation and
Operations Manual
Part 800-012-001
Gentner Communications
is not responsible for
product damage incurred
during shipment. You must make
claims directly with the carrier.
Inspect your shipment carefully for
obvious signs of damage. If the
shipment appears to be damaged,
retain the original boxes and
packing material for inspection by
the carrier. Contact your carrier
immediately.
!
4 Rack Mount Screws
Part 681-400-001
Please register your DH20/22 online by visiting Gentner Technical
Support on the World Wide Web at www.gentner.com. When your
product is properly registered, Gentner Communications can better
serve you should you require technical assistance or want to receive
upgrades or new product information.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
Product
Registration
6
INTRODUCTION • UNPACKING
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
OVERVIEW • ABOUT THE DH20/22
7
2
Overview
About the DH20/22
• Crystal clear, consistent audio quality
• Continual adaptation to telephone line conditions
• Selectable automatic mix-minus
• Selectable caller automatic gain control (AGC)
• 1W power amp with volume control on front-panel
• Selectable mic/line level input
• On/Off control via front panel and rear panel remote connection
• Analog receive filter for telephone line noise reduction
• Selectable caller control (ducking)
• Balanced inputs and outputs
• Auxiliary output for recording
• Simple installation and operation
• Adjustable send/caller audio level control
• Selectable single-ring auto-answer
• Selectable auto-disconnect
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
OVERVIEW • PRODUCT DESCRIPTION
8
Product Description
DH20/22
The DH20 and DH22 provide superior analog telephone integration into
broadcast applications. With a variety of selectable functions from the
front panel DIP switches, these digital hybrids can be customized to
meet your specific needs. By continually adapting to telephone line conditions and isolating send audio from caller audio, the DH20 and DH22
produce clean, consistent audio. Installation to consoles with no mixminus capability is no problem. Both hybrids offer the built-in mix-minus
feature.
DH22
The DH22 is a dual hybrid unit designed for conferencing two telephone
lines. The DH22 has all the same features as the DH20, but can handle
two callers at once. The two internal hybrids contain a common Send
audio input and the two telephone lines are internally conferenced. This
means two callers can be on-air at once. Both callers’ audio can be output as a single input on your console or as two separate outputs to two
console inputs.
Telephone Separation (Null)
Using Digital Signal Processing (DSP) technology and firmware
developed by Gentner, the interface between a standard analog POTS
line and your audio equipment will result in superior quality audio.
The primary function of the DH20 and DH22 hybrids are to maximize the
null by maximizing the separation of send and caller audio. Both hybrids
provide >55dB null between 250kHz to 3.5kHz.
Automatic Gain Control (AGC)
AGC normalizes the gain of caller audio, augmenting the level of “soft”
callers, and attenuating the level of “loud” callers. This helps provide
more uniform caller audio levels at the caller output of the hybrid.
The AGC threshold is -50dBm. The AGC works to achieve an equivalent
average caller level of -30dBm from the telephone circuit.
Automatic Mix-Minus
The DH20 and DH22 auto mix-minus creates a mix-minus for the hybrid
when one is not available from the audio console. Caller/send isolation
is equal to or greater than 50dB between 250Hz to 3.5kHz with 12dB
maximum external loop gain. Send audio suppression up to 12dB
maximum may be applied.
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
OVERVIEW • PRODUCT DESCRIPTION
9
Caller Control
Caller control, also know as ducking, attenuates the caller input audio
when send audio is present. The purpose of this attenuation is to allow
the talent to dominate their conversation with the caller. The amount of
caller control, attenuation, applied to the caller audio is selectable from
0 to 18dB in 6dB increments.
Front-Panel Controls
The front-panel controls perform the following functions:
9 10
123 4
5
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7 8
11 12
6
DH20 front-panel controls
7a 8a 9a 10a
Hybrid 1
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DH
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Hybrid 2
11a 12a
1. Send In. This trim pot adjusts the level of audio sent to the phone
line via the Send In jack. At its midpoint (6 o’clock position), the trim
pot is set for nominal send level (0dBm).
2. Aux Send. This trim pot adjusts the level of the auxiliary send audio
coming from the remote connector input and going onto the
telephone line to the caller. At its midpoint (6 o’clock position), the
trim pot is set for nominal level (0dBm).
3. Aux Out. This trim pot adjusts the level of the audio at the Aux Out
jack. At its midpoint (6 o’clock position), the trim pot is set for
nominal level (0dBm).
4. Caller Out. This trim pot adjusts the caller audio level to the user’s
equipment. At its midpoint (6 o’clock position), the trim pot is set for
nominal caller level (0dBm).
4a. The DH22 has a second Caller Out trim pot for hybrid 2.
5. DIP Switches. These DIP switches configure the hybrid’s system.
Individual switch functions are defined in Calibration (page 20).
6. Volume. These up/down buttons control the audio level of the
monitor out speaker amplifier. Pressing once changes the level by
1dB. Pressing and holding a button sweeps the level up or down.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
DH22 front-panel controls
10
OVERVIEW • PRODUCT DESCRIPTION
7. Send LED. This bi-color LED indicates the relative level of the send
audio into the digital hybrid. Green indicates nominal level, amber
indicates caution, red indicates clipping.
7a. The DH22 has a second Send LED for hybrid 2.
8. Caller LED. This bi-color LED indicates the relative level of the
caller audio from the telephone line. Green represents nominal
level, amber indicates caution, red indicates clipping.
8a. The DH22 has a second Caller LED for hybrid 2.
9. On LED. This LED indicates the DH20/22 has connected with the
phone line. The LED illuminates green when the hybrid is on and
flashes green when the phone line is ringing.
9a. The DH22 has a second On LED for hybrid 2.
10. Off LED. This LED indicates the hybrid is not connected to an
active phone line. The LED illuminates red when the hybrid is off.
10a. The DH22 has a second Off LED for hybrid 2.
11. On. The On switch connects the hybrid to the telephone line.
11a. The DH22 has a second On switch for hybrid 2.
12. Off. The Off switch disconnects the hybrid from the telephone line
and mutes all audio going to and from the telephone line.
12a. The DH22 has a second Off switch for hybrid 2.
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
OVERVIEW • PRODUCT DESCRIPTION
11
Rear Panel Connectors
DH20 rear panel connectors
a
1. Power. The AC power cord input is a IEC type connector allowing
use of premolded domestic US power cords as well as various other
premolded international power cords.
a
DH22 rear panel connectors
2. Remote. This DB25 female connector provides remote control and
status of the hybrid. Unbalanced send in, caller out ,and aux out
audio are also available at the remote connector. See Appendix C:
Connector Pinouts (page 29).
3. Monitor Out. This 1/4" jack is a speaker connection for
monitoring the caller audio signal. The monitor output provides 1
watt into an 8 ohm speaker.
4. Send In. This balanced, female, 3-pin XLR input receives audio
from the source (microphone or mixer) and sends it to the caller.
Audio sent to the caller must be a mix-minus. See Mix-Minus (page
16).
5. Caller Out. This balanced, male, 3-pin XLR output contains the
audio from the caller.
5a. The DH22 has a second Caller Out for hybrid 2.
6. Aux Out. This balanced, male, 3-pin XLR output contains a mix of
caller and send audio or caller audio only. See DIP switches (page
20). This connector can feed a recording device to record both the
caller and send audio.
7. Line. This RJ11 connector provides connection of the telephone
line to the hybrid. A-Lead closure is provided.
8. Set. This RJ11 connector allows connection to a standard analog
telephone set. The telephone line is present at this connector when
the hybrid is off. The telephone line is not present at this connector
when the hybrid is on. A-Lead closure is provided.
8a. The DH22 has a second line and set pair for hybrid 2.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
If using a single
microphone that needs
phantom power to
operate, you must supply this
power to the microphone.
The digital hybrid does not
supply phantom power.
✍
12
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
INSTALL ATION • BEFORE YOU INSTALL
13
3
Installation
Before You Install
Power Requirements
The hybrids automatically adjust to accept voltage requirements of
100–240VAC, 50/60Hz.
Telephone Line Requirements
The DH20/22 operates on a standard POTS (plain old telephone service) analog telephone line or an analog extension from a PBX via a standard RJ11C modular jack.
✍
Some telephone lines do
not provide battery voltage
(dry line, no DC offset voltage). If yours does not, the
DH20/22 may be configured by
qualified personnel for dry line
operation. Please contact Gentner
technical support for details.
Installation
The hybrids are designed for easy installation and set up. All necessary
interface connections are made through rear panel connectors. Refer
to Rear Panel Connectors (page 11) for a description and placement of
each of the connections you will be making.
The diagram below illustrates typical hybrid connections for the DH20.
To install your hybrid, make the following connections:
Telephone Line
Telephone Set
Console In
Mix-Minus Out
SEND IN
Typical DH20 Installation
CALLER OUT
AUX OUT
Record Input
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
INSTALL ATION • INSTALL ATION
14
The diagrams below illustrate typical hybrid connections for the DH22.
Telephone
Set
Telephone
Line 1
Console In
SEND IN
CALLER 1 OUT
CALLER 2 OUT
Typical DH22 Installation
Independent Callers
Telephone Telephone
Line 2
Set
AUX OUT
Caller 1 & Caller 2
Telephone
Set
Telephone
Line 1
Console In
Telephone Telephone
Line 2
Set
Caller 1 & 2 Mixed
SEND IN
Typical DH22 Installation
Callers Mixed
CALLER 1 OUT
CALLER 2 OUT
AUX OUT
Caller 1 & Caller 2
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
INSTALL ATION • INSTALL ATION
15
To install your hybrid, make the following connections.
Power Connection
The hybrid will operate at any power level between 100–240VAC,
50–60Hz.
Remote Control
If using a remote control for parallel control and hybrid status, use the
DB25 Remote connector. For pinouts, see Appendix C: Connector
Pinouts (page 29).
Monitor Out
This 1/4" TRS jack provides a 1W amplified caller signal into an 8 Ohm
speaker.
GND
GND
Send In
Connect the Send In female XLR jack to an output from your studio
console. When the hybrid is on, the audio connected to this input will be
fed onto the phone line. Audio sent to the telephone line must be a mixminus. See Mix-Minus (page 16).
Caller 1 and 2 Out
Connect the Caller Out male XLR jack(s) to an input(s) on your audio
console. When the hybrid is on, this output will contain the audio
coming from the caller(s). The DH22 Caller Out audio may be configured for a mix of caller audio on Caller 1 Out or independent caller
audio on Caller 1 Out and Caller 2 Out. See DIP switches (page 20).
Aux Out
Connect this male XLR jack to your recording device. The Aux Out can
be configured to contain a mix of send audio and caller audio or caller
audio only. See DIP Switches (page 20).
Telco 1 Line
Plug your analog telephone line into the RJ11C line jack.
TELCO 1
LINE SET
Telco 1 Set
Plug your telephone set into the RJ11C set jack.
Telco 2 Line (For DH22)
Plug your second analog telephone line into the RJ11C line jack.
Telco 2 Set (For DH22)
Plug your second telephone set into the RJ11C set jack.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
TELCO 2
LINE SET
INSTALL ATION • MIX-MINUS
16
Mix-Minus
Mix-minus is a mix of all audio being sent to the Send In jack of the
hybrid, minus the caller audio. Without a mix-minus feed from the
console, the caller audio sent to the console will be retransmitted to the
caller. This can cause hollow sounding audio and can even result in
feedback. The following diagrams illustrate some of the ways to
create/configure an external mix-minus feed for the DH20/22 hybrid. If
these diagrams do not apply or are not desirable, then simply activate
the DH20/22’s internal mix-minus feature. See DIP switches (page 20).
Using the Mic Preamp of the Hybrid
If only microphone audio is being sent to the caller, the internal microphone preamplifier of the hybrid may be used. When doing this, change
the Send In jack from a line level input to a mic level input by placing
DIP switch #4 to the on (up) position. In this configuration, make sure
the microphone is not picking up the caller’s audio as it is presented in
the room by the speaker.
Telephone Line
Monitor Send
Telephone Set
Speaker
Microphone
Tape Player
Using the Direct Mic Output of the Console
If only microphone audio is being sent to the caller, then it is possible to
use the console’s direct microphone output. Use the console direct
microphone output to provide line level microphone audio to the Send
In jack of the DH20/22.
Telephone Line
Send Caller
Telephone Set
Mix -Minus
Program Mix
Tape Player/Recorder
Transmitter
CD Player
Microphone
Mix Output
Inputs
Console/Mixer
Note: Microphone audio receives
preamplification from the console.
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INSTALL ATION • MIX-MINUS
17
Using a Discrete Microphone Mixer
If only microphone audio is being sent to the caller, a separate
microphone mixer may be used. The mic mixer will provide the mixminus feed for the hybrid, because its output contains no caller audio.
Telephone Line
SPH 10
Send Caller
Telephone Set
Mix-Minus
Program Mix
Tape Player/Recorder
Transmitter
CD Player
Mic Mixer
Mix Output
Inputs
Microphones
Console/Mixer
Using an Internal Mix Bus (Telephone Module)
Many console manufacturers provide optional telephone hybrid
modules for their consoles. These modules are designed to receive
audio from a hybrid and transmit audio to the hybrid. A telephone
module will create a mix-minus for the hybrid at its output.
Telephone Line
Send Caller
Telephone Set
Mix-Minus
Program Mix
Tape Player/Recorder
Transmitter
CD Player
Microphone
Mix Output
Inputs
Console/Mixer
Note: The Telephone Module
provides a mix-minus output.
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INSTALL ATION • MIX-MINUS
18
Using a Separate Mix Output Bus from the Console
If the console has an extra mix output, then use this extra output to provide a mix-minus feed for the hybrid. Simply route all audio, minus the
caller audio, to the extra output bus of the console (Output B).
Telephone Line
Send Caller
Telephone Set
Mix-Minus
Program Mix
Tape Player/Recorder
Transmitter
CD Player
Microphone
Output Output
Inputs
A
B
Console/Mixer
ON
OFF
Note: All input channels are selected
to the Outputs A and B, except for the
incoming caller audio. It is selected to
Output A only.
Using a Separate Auxiliary Output Bus from the Console
If the console has an auxiliary output, usually called Aux Out or Aux
Send, then use this auxiliary output to provide a mix-minus feed for the
hybrid. Simply route all audio, minus the caller audio, to the auxiliary
output bus of the console.
Telephone Line
Send Caller
Telephone Set
Mix-Minus
Program Mix
Tape Player/Recorder
Mix
Output
Transmitter
Aux
Output
CD Player
Microphone
Mix
Auxiliary
Output Output
Console/Mixer
Inputs
Note: All input channels have been
turned up with the auxiliary level controls,
with the exception of the incoming caller
audio. Therefore the auxiliary output contains
all input sources minus the caller audio.
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
INSTALL ATION • MIX-MINUS
19
Using the Stereo Outputs of the Console
By using the stereo outputs of the console, it is possible to create a
mix-minus for the hybrid. By panning the caller audio to the left channel
only, the caller audio is prevented from reaching the right channel
output of the console. Therefore, the right channel output is a
mix-minus, a mix of all audio minus the caller audio.
Telephone Line
Send Caller
Telephone Set
Mix-Minus
Program Mix
Tape Player/Recorder
Transmitter
CD Player
Microphone
Stereo
Output
Inputs
Console/Mixer
Note: The Incoming caller audio is
faded to the left channel of the console's
stereo output. This prevents caller audio
from being returned to the send input.
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INSTALL ATION • CALIBRATION
20
Calibration
DIP Switches
DIP switches are “off” in the down position and “on” in the up position.
6. CALLER CONTROL 2
5. CALLER CONTROL 1
4. MIC LINE
3. ON/OFF MODE
2. CALLER BOOST
1. BURST ADAPT
7. AUTO ANSWER
8. AUTO DISCONNECT
9. CALLER AGC
10. MIX-MINUS
11. CALLER 1 MIX
12. AUX MIX
CALLER 1 CALLER 2
OUT
OUT
DH20/22 DIP switches
Burst Adapt
DIP switch 1 enables/disables the burst adapt feature. In the off position
(down) the hybrid is in auto adapt mode and the hybrid will send a very
short courtesy tone to the caller upon connection to the telephone line.
In the on position (up) the hybrid will send a noise burst to the
telephone line and aggressively adapt before returning to auto adapt
mode. Each press of the On button will generate a new noise burst.
In either mode the hybrid continually monitors and adapts to the changing telephone line conditions in order to digitally cancel the telephone
line echo and provide the best send-to-caller separation possible.
Caller Boost
DIP switch 2 enables/disables the caller boost feature. In the off
postion (down) the caller boost feature is disabled. In the on position
(up) the hybrid adds 6dB of level boost to the caller's audio at the Caller
Out jack.
DH20
DH20
Momentary and Latching switches
Remote On/Off Control
DIP switch 3 allows the hybrid to work with two types of switches for
external control: momentary and latching. In the off position (down) the
On/Off control inputs respond to momentary closures to ground. This
turns the hybrid on when it receives a momentary closure on the On
control input and off when it receives a closure on the Off control input.
In the on position (up) the Off control input is disabled and the On
control input responds to a latching closure to ground. This will cause
the hybrid to turn on when the latching switch is closed to ground and
the hybrid will remain on until the closure to ground is opened. This DIP
switch setting also affects the operation of the front panel On/Off
buttons. See Appendix B (page 29) for remote control connector
pinouts.
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INSTALL ATION • CALIBRATION
21
Mic/Line Select
DIP switch 4 sets the gain of the Send In jack. In the off position (down) the
input is a line level (0dB) input. In the on position (up) the input is a mic
level providing +55dB of input gain.
Caller Control (Ducking)
DIP switches 5 and 6 enable/disable the caller control feature. In the on
position (up) the hybrid will provide caller control, which is the suppression
of caller audio when send audio is present. In the off position (down) caller
control is disabled. DIP switch 5, when active, adds 6dB of caller control
and DIP switch 6, when active, adds 12dB of caller control. If both are
active, then the sum of the two DIP switches is used and 18dB of caller
control is provided.
Auto Answer
DIP switch 7 enables/disables the auto answer feature. In the off position
(down) the hybrid will not automatically answer the telephone line. In the on
position (up) the hybrid will automatically answer the telephone line after
the first ring.
Auto Disconnect
DIP switch 8 enables/disables the auto disconnect feature. In the off position (down) the hybrid will not automatically disconnect the telephone line.
In the on position (up) the hybrid will automatically disconnect the telephone line after the caller hangs up.
Automatic Gain Control (AGC)
DIP switch 9 enables/disables the AGC feature. In the off position (down)
the AGC feature is disabled. In the on position (up) the AGC feature is
enabled. When enabled, the AGC feature normalizes the gain of the caller
audio, augmenting the level of "soft" callers, and attenuating the level of
"loud" callers. This helps provide more uniform caller audio levels at the
caller output of the hybrid. The AGC threshold is -50dBm and the AGC
works to achieve an equivalent average caller level of -30dBm from the
telephone circuit.
Automatic Mix-Minus
DIP switch 10 enables/disables the automatic mix-minus feature. In the off
position (down) the automatic mix-minus feature is disabled. In the on position (up) the automatic mix-minus feature is enabled. When automatic mixminus is enabled, it is not necessary for you to create a mix-minus output
with your console/mixer. You can simply feed program audio to the send
input of the hybrid and the hybrid will automatically remove the caller audio
from the program mix and prevent it from returning to the caller as echo,
which prevents possible feedback.
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The telephone line must
provide loop drop, loop
reversal, or call progress
signals in order for the auto
disconnect feature to function.
Most telephone systems will
provide loop drop shortly after the
calling party hangs up. Some PBX
systems, but not all, will provide
either loop drop or call progress
tones such as reorder tones or
busy signals. The hybrid will
detect most of these signals and
then auto disconnect from the
telephone line.
✍
INSTALL ATION • CALIBRATION
22
✍
Caller 1 Mix (DH22 Only)
DIP switch 11 enables/disables the Caller 1 Mix feature. In the off
(down) position the Caller 1 Mix feature is disabled and telephone lines
one and two will appear at the Caller 1 Out and Caller 2 Out XLR
connectors respectively. This allows each caller to be routed to a separate input channel of a console or mixer. In the on (up) position the
Caller Mix feature is enabled and telephone lines one and two will be
internally mixed by the hybrid and appear at the Caller 1 Output. This
allows two callers to be routed to a single input channel of a console or
mixer.
When Caller 1 Mix is
enabled, the Caller 2 XLR is
not active.
Aux Mix
DIP switch 12 enables/disables the aux mix feature. In the off (down)
position, the Aux Out and Remote Aux Out will contain caller audio only.
In the on (up) position the Aux Out and Remote Aux Out audio will contain a mix of send and caller audio.
Trim Pots
The front panel trim pots provide level adjustments of the Send In, Aux
Send, Aux Out, and Caller Out audio connectors. Separate audio level
controls let you optimize the audio level(s) of the DH20/22 to match the
audio levels required by the interfaced audio equipment.
In order to optimize the audio levels, have someone call the hybrid from
another location. Answer the line by pressing the On button and continue through the level adjustments. Be aware that some suppression
and/or echo may be heard while calibrating the audio levels. Disregard
it and continue until the end of the procedure. When the hybrid is properly calibrated there will be no echo or suppression.
DH20/22 trim pots
With comfortable listening
levels, the Send LED
should illuminate solid
green with an occasional flash of
amber on audio peaks. If the Send
LED illuminates red, the audio
levels are clipping and should be
decreased via the send level
adjustments.
✍
Send In Adjustment
This pot adjusts the Send In audio. Adjust this pot along with your console audio control until callers verify that the audio level they are receiving is at a comfortable listening level.
Aux Send Adjustment
This pot adjusts the level of the auxiliary send audio at the remote
connector input. Adjust this pot along with your console audio control
until callers verify that the audio level they are receiving is at a comfortable listening level.
Aux Out Adjustment
This pot adjusts the level of send and caller audio at the Aux Out jack.
Adjust this pot along with your console audio control to set the proper
level for your recording device or other external devices.
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INSTALL ATION • CALIBRATION
Caller 1 Out Adjustment
This pot adjusts the Caller 1 Out audio. Adjust this pot along with your
console audio control to set the caller’s voice/audio to a comfortable
listening level.
Caller 2 Out Adjustment
This pot adjusts the Caller 2 Out audio. Adjust this pot along with your
console audio control to set the caller’s voice/audio to a comfortable
listening level.
Training the Telephone Echo Canceller
Upon connection to the telephone line, the digital hybrid will automatically begin its telephone echo cancellation process. This will optimize
the send to caller separation. If the send to caller separation is not sufficient, you may force the hybrid to "train" itself to the telephone line by
pressing and holding the On button for one second. After one second,
the hybrid will emit a burst of white noise. The noise burst allows the
hybrid to aggressively adapt to the echo returning from the telephone
network and allows the hybrid to maximize its send-to-caller separation.
This noise burst can be generated at any time by pressing and holding
the On button for one second. To force a noise burst on every connection to the telephone line, activate the Burst Adapt DIP switch 1. See DIP
switches on page 20.
Training the Mix-Minus
Upon connection to the telephone line, the digital hybrid will automatically begin its mix-minus echo cancellation processes. To verify/fine
tune the calibration of the mix-minus, watch the Send LED as the caller
speaks. If the Send LED is not lighting or only flashing green on the
caller's audio peaks, then the calibration is already complete. If the
Send LED is lighting solid green on caller audio, decrease the loop gain
via the Send Input pot or the console level control and train the telephone echo canceller. As the caller continues to speak, you should
notice that the Send LED will begin to illuminate less and less until it no
longer illuminates green on caller audio. This process may need to be
repeated if the desired results are not achieved or if the caller is
complaining of excessive echo.
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23
The Caller trim pot has no
effect on the Caller LED.
The Caller LED indicates
actual level from the telephone line
only. If the Caller LED flashes green
only ocassionally with caller audio,
the level from the telephone line is
too low and you should activate the
Caller Boost DIP switch. See DIP
swiches on page 20.
✍
24
INSTALL ATION • CALIBRATION
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
OPERATION • FRONT PANEL
25
4
Operation
Front Panel
Easy-to-access front panel controls make operation of the DH20/22
simple.
4 5
DH
20
1
2 3
Front panel controls
Using the Hybrid
Press the On button (2) to connect the hybrid to the telephone line.
Press the Off button (3) to disconnect the hybrid from the telephone
line.
Using the Telephone Set
The On and Off buttons do
not turn on/off the power to
the DH20/22. They connect
and disconnect it from the phone
line. On=on line. Off=off line.
✍
Lift the handset to connect the telephone to the telephone line. Hang
up the handset to disconnect the telephone from the telephone line.
Switching a Call from the Set to the Hybrid
Press the hybrid's On button (2). The active call will switch from the
phone to the hybrid.
Switching a Call from the Hybrid to the Set
DH22 users:
Ensure that you press the
On or Off button that
corresponds with the hybrid you
wish to connect or disconnect.
✍
Make sure the telephone handset is off hook. Then press the hybrid's
Off button (3). The active call will switch from the hybrid to the phone.
Disconnecting a Call
To disconnect the telephone line, the hybrid must be off and the
telephone handset must be hung up. If either the hybrid is on or the
handset is off hook, then the phone line is still active.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
DH22 users:
When both hybrids are
active in the On position,
telephone callers will be
conferenced internally by the DH22.
✍
INSTALL ATION • FRONT PANEL
26
Placing a Call
Lift the handset and listen for the dial tone. Dial the party you wish to
call. Talk to the caller with the telephone set or press the hybrid's On
button (2) to talk through the hybrid. When finished, press the Off
button (3) and/or hang up the handset.
Adjusting the Monitor Output Level
To adjust the level at the monitor output, use the volume buttons (1).
With each press, the volume button increases the monitor output
level by 1dB. The volume button decreases the monitor output level
by 1dB. Pressing and holding the or button will sweep the level up
or down respectively.
Remote Control Option
The remote control connector can be used to perform three functions:
Monitor Mute On/Off, Hybrid On, and Hybrid Off.
If using a remote control device, internal DIP switch 3 will select the
type of button switch function you need (momentary or latching). See
Calibration (page 20).
DIP switch 3 does not change the operation of the monitor mute input.
The monitor output will be muted for as long as the monitor mute input
pin is tied to ground.
Recording Option
While on a connected call, a mix of both send and caller(s) audio, or
caller(s) audio only, will be routed to the Aux connector. Connect your
recording device to this connector. Activate the record function of the
external recording device to capture the audio.
Telephone Line
Telephone Set
Console In
Mix-Minus Out
SEND IN
Typical DH20 Installation
CALLER OUT
AUX OUT
Record Input
Typical recording configuration
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APPENDICES • APPENDIX A: SPECIFICATIONS
27
A
Appendices
Appendix A:
Specifications
DIMENSIONS
17.125"/43.5cm W x 1.75"/4.44cm H x
10.125"/25.7cm D
WEIGHT
6.4lbs/2.9kg (dry)
11.3/5.13kg (shipping)
OPERATING TEMPERATURE
32-100°F / 0-38°C
HUMIDITY
0-80%
FRONT PANEL CONTROLS
CONTROLS:
Hybrid One On Button
Hybrid One Off Button
Hybrid Two On Button (DH22)
Hybrid Two Off Button (DH22)
Volume Up and Volume Down Buttons
STATUS LEDS:
On Status
Off Status
Hybrid One Send Audio Presence
Hybrid One Caller Audio Presence
Hybrid Two Send Audio Presence (DH22)
Hybrid Two Caller Audio Presence (DH22)
ADJUSTMENTS:
Send Input Level
Caller One Output Level
Caller Two Output Level
Auxiliary Input Level
Auxiliary Output Level
Burst Adapt Selection
Mic/Line Selection
Caller Boost Selection
Momentary/Latching Control
Auto Answer/Disconnect Selection
Caller Control Selection (0, 6, 12, or 18dB)
AGC Selection
Auto Mix-Minus Selection
Caller One Mix Selection (DH22)
Aux Mix Selection
REAR PANEL CONNECTORS
POWER: IEC Type
Auto Adjusting, 100-240VAC, 2A,
50/60Hz, 30W
REMOTE: DB25 female
Remote Send input:
0dBu nominal, adjustable, unbalanced,
20kOhm impedance
Remote Caller and Aux outputs:
0dBu nominal, adjustable, unbalanced, 50
Ohm impedance
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APPENDICES • APPENDIX A: SPECIFICATIONS
28
Control inputs:
Remotely activate any of the following
functions with a switch closure to ground:
Hybrid 1 ON, Hybrid 1 OFF, Hybrid 2 ON,
Hybrid 2 OFF, and Monitor Mute.
Status Outputs:
Remotely check the status and audio
presence of the hybrids using the hybrid 1
and 2 ON, OFF, Send, and Caller Presence
status outputs. Status outputs are open
collector outputs rated at 30VDC and 40mA
maximum.
MONITOR OUTPUT: 1/4" stereo jack
Tip = + phase, Ring = ground, Sleeve = ground,
1W output into an 8 Ohm load
SEND INPUT: XLR female
Mic/Line selectable, -55/0dBu nominal,
adjustable, balanced bridging, 20kOhm
impedance
CALLER 1 AND 2 OUTPUTS: XLR male
0dBu nominal, adjustable, balanced,
50 Ohm impedance
AUX OUTPUT: XLR male
0dBu nominal, adjustable, balanced,
50 Ohm impedance
TELCO 1 AND 2 LINES: RJ11 connector
POTS (plain old telephone service) telephone
line or analog extension from a PBX or dry line
(no DC offset voltage). A-Lead Supervision
provided
TELCO 1 AND 2 SETS: RJ11 connector
A-Lead Supervision provided
TELEPHONE TRANSMIT
Nominal send input of 0dBu referenced to
–15dBu onto the telephone line.
FREQUENCY RESPONSE:
+/- 1dB from 250Hz to 3.5kHz
SIGNAL TO NOISE:
>56dB
DISTORTION:
<0.2%
TELEPHONE RECEIVE
Nominal phone line level of –15dBu referenced
to caller output of 0dBu.
FREQUENCY RESPONSE:
+/- 1dB from 250Hz to 3.5kHz
SIGNAL TO NOISE:
>56dB
DISTORTION:
<0.2%
NULL
SEND-TO-CALLER SEPARATION:
55dB nominal
TAIL TIME:
32 milliseconds
MIX-MINUS
CALLER-TO-SEND SEPARATION:
50dB nominal
TAIL TIME:
32 milliseconds
All specifications are subject to change without
notice.
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APPENDICES • APPENDIX B: CONNECTOR PINOUTS
Remote Connector Pinout
Pin
Description
1
Remote Hybrid 1 On *
2
Remote Hybrid 1 Off *
3
Remote Hybrid 2 On *#
4
Remote Hybrid 2 Off *#
5
Switch/Indicator Common
6
Hybrid 2 Send Presence Indication **#
7
Hybrid 2 Caller Presence Indication **#
8
N/C
9
Unbalanced Send Audio Input (0dBu nominal)
10
Unbalanced Caller Audio Output (0dBu nominal)
11
Unbalanced Aux Audio Output (0dBu nominal)
12
Monitor Mute Control*
13
Audio Common
14
Hybrid 1 On Indication **
15
Hybrid 1 Off Indication **
16
Hybrid 2 On Indication **#
17
Hybrid 2 Off Indication **#
18
Switch/Indicator Common
19
Hybrid 1 Send Presence Indicator **
20
Hybrid 1 Caller Presence Indicator **
21
Switch/Indicator Common
22
Audio Common
23
Audio Common
24
Audio Common
25
Switch/Indicator Common
* Remote control provided via contact closure to Switch/Indicator
Common
** Remote indicators provided via open collector outputs to Indicator
Common (<15V, <39mA)
# DH22 only.
Line Connector Pinout
Pin
Description
1
To pin 6 of SET RJ11C
2
To pin 5 of LINE
3
Tip
4
Ring
5
To pin 2 of SET
6
To pin 1 of SET RJ11C
Set Connector Pinout
Pin
Description
1
To pin 6 of LINE RJ11C
2
To pin 5 of SET
3
Ring
4
Tip
5
To pin 2 of LINE
6
To pin 1 of LINE RJ11C
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29
Appendix B:
Connector Pinouts
APPENDICES • APPENDIX C: BLOCK DIAGRAMS
30
Appendix C:
Block Diagrams
DH20 Block Diagram
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APPENDICES • APPENDIX C: BLOCK DIAGRAMS
31
DH22 Block Diagram
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APPENDICES • APPENDIX D: WARRANT Y & COMPLIANCE
32
Appendix D:
Warranty &
Compliance
Warranty
Gentner Communications Corporation (Manufacturer) warrants that this product is free of defects in both materials
and workmanship. Should any part of this equipment be defective, the Manufacturer agrees to:
A. Repair or replace any defective part free of charge (except transportation charges) for a period of one
year from the date of the original purchase, provided the owner returns the equipment to the Manufacturer at the
address set forth below. No charge will be made for parts of labor during this period; or,
B. Furnish replacement for any defective parts in the equipment for a period of one year from the date of original
purchase. Replacement parts shall be furnished without charge, except labor and transportation.
This Warranty excludes assembled products not manufactured by the Manufacturer whether or not they are
incorporated in a Manufacturer product or sold under a Manufacturer part or model number.
THIS WARRANTY IS VOID IF:
A. The equipment has been damaged by negligence, accident, act of God, or mishandling, or has not been
operated in accordance with the procedures described in the operating and technical instructions; or,
B. The equipment has been altered or repaired by other than the Manufacturer or an authorized service
representative of the Manufacturer; or,
C. Adaptations or accessories other than those manufactured or provided by the Manufacturer have been made or
attached to the equipment which, in the determination of the Manufacturer, shall have affected the performance,
safety, or reliability of the equipment; or,
D. The equipment's original serial number has been modified or removed.
NO OTHER WARRANTY, EXPRESS OR IMPLIED, INCLUDING WARRANTY OF MERCHANTABILITY OR FITNESS FOR
ANY PARTICULAR USE, APPLIES TO THE EQUIPMENT, nor is any person or company authorized to assume any
warranty for the Manufacturer or any other liability in connection with the sale of the Manufacturer's products.
Manufacturer does not assume any responsibility for consequential damages, expenses, or loss of revenue or
property, inconvenience, or interruption in operation experienced by the customer due to a malfunction in the
purchased equipment. No warranty service performed on any product shall extend the applicable warranty period.
In case of unsatisfactory operation, the purchaser shall promptly notify the Manufacturer at the address set forth
below in writing, giving full particulars as to defects or unsatisfactory operation. Upon receipt of such notice, the
Manufacturer will give instructions respecting the shipment of the equipment, or such other matters as it elects to
honor this warranty as above provided. This warranty does not cover damage to the equipment during shipping and
the Manufacturer assumes no responsibility for such damage. All shipping costs shall be paid by the customer.
This warranty extends only to the original purchaser and is not assignable or transferable.
Gentner Communications Corporation, 1825 Research Way, Salt Lake City, Utah 84119
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
APPENDICES • APPENDIX D: WARRANT Y & COMPLIANCE
33
FCC Part 15 Compliance
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15
of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct the interference at his/her own expense.
Changes or modifications not expressly approved by Gentner Communications Corporation could void the user’s
authority to operate the equipment.
FCC Part 68 Compliance
FCC Registration Number: FBIUSA-31573-BR-N
Ringer Equivalence Number (REN): 1.1B
A label containing, among other information, the FCC registration number and Ringer Equivalence Number (REN)
for this equipment is prominently posted on the top plate, near the rear of the equipment. If requested, this
information must be provided to your telephone company.
USOC Jacks: This device uses RJ11C terminal jacks.
The REN is used to determine the quantity of devices which may be connected to the telephone line. Excessive
RENs on the telephone line may result in the devices not ringing in response to an incoming call. In most, but not all
areas, the sum of the RENs should not exceed five (5). To be certain of the number of devices that may be
connected to the line, as determined by the total RENs, contact the telephone company to obtain the maximum
RENs for the calling area.
If this equipment causes harm to the telephone network, the telephone company will notify you in advance that
temporary discontinuance of service may be required. If advance notice is not practical, the telephone company will
notify the customer as soon as possible. Also, you will be advised of your right to file a complaint with the FCC if you
believe it is necessary.
The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect
the operation of the equipment. If this happens, the telephone company will provide advance notice for you to make
the necessary modifications in order to maintain uninterrupted service.
If you experience problems with this equipment, contact Gentner Communications Corporation, 1825 Research
Way, Salt Lake City, Utah 84119, or by telephone at (801) 975-7200 for repair and warranty information. If the trouble
is causing harm to the telephone network, the telephone company may request you remove the equipment from
the network until the problem is resolved.
No user serviceable parts are contained in this product. If damage or malfunction occurs, contact Gentner
Communications for instructions on its repair or return. This equipment cannot be used on telephone company
provided coin service. Connection to Party Line Service is subject to state tariffs.
TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
34
APPENDICES • APPENDIX D: WARRANT Y & COMPLIANCE
IC Compliance
NOTICE: The Industry of Canada label identifies certified equipment. This certification means that the equipment
meets certain telecommunications network protective operational and safety requirements. The Department does
not guarantee the equipment will operate to the user's satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the
local telecommunications company. The equipment must also be installed using an acceptable method of
connection. In some cases, the company's inside wiring associated with a single line individual service may be
extended by means of a certified connector assembly (telephone extension cord). The customer should be aware
that compliance with the above conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by
Gentner Communications. Any repairs or alterations made by the user to this equipment, or equipment
malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections of the power utility, telephone
lines and internal metallic water pipe system, if present, are connected together. This precaution may be particularly
important in rural areas.
Ringer Equivalence Number (REN): 1.1
IC Certification Number: 1970 8175 A
European Compliance
This equipment has been approved in accordance with Council Decision 98/482/EC for pan-European single
terminal connection to the public switched telephone network (PSTN). However, due to differences between the
individual PSTNs provided in different countries, the approval does not, of itself, give an unconditionally assurance of
successful operation on every PSTN network termination point. In the event of problems, you should contact your
equipment supplier in the first instance.
Gentner Communications Corporation of 1825 Research way, Salt Lake City, Utah 84119, U.S.A. declares that this
equipment is designed to be compatible with the following networks: Austria, Belgium, Denmark, Finland, France,
Germany, Greece, Iceland, Ireland, Italy, Liechtenstein, Luxembourg, The Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland, and United Kingdom.
TECHNICAL SUPPORT: 1.800.283-5936 (USA) OR 1.801.974.3760
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