CIB 3125 (122A) Off-Premises Range Extender

CIB 3125
(122A) Off-Premises Range Extender
Installation Instructions
Installed By Qualified Technician Only
CIB 3125
106793441
© 1992 AT&T
All Rights Reserved
Printed in USA
Issue 3
August 1992
NOTICE
Every effort has been made to ensure that the information in this booklet
was complete and accurate at the time of printing. However, the
information is subject to change without notice.
TRADEMARK NOTICES
MERLIN is a registered trademark of AT&T.
MERLIN LEGEND is a trademark of AT&T.
PARTNER is a registered trademark of AT&T.
Safety Information
Before installing this product, please read and understand the safety
instructions before the installation instructions. This booklet also
contains instructions related to safety labels on the product. Such
instructions are identified by a triangle symbol, as follows:
The exclamation point within an equilateral triangle is intended to
alert you to the presence of important operating and
maintenance instructions in the literature accompanying the
product. Always follow these basic safety precautions when
using your telephone equipment. These precautions reduce the
risk of electric shock to you and damage to the equipment.
WARNING: indicates the presence of a hazard that can cause
death or severe personal injury if the hazard is not avoided.
CAUTION: indicates the presence of a hazard that will or can
cause minor personal injury or property damage if the hazard is not
avoided.
Safety Instructions for Installation Personnel
WARNING: This product must be installed by a qualified technician
only and must be properly grounded. Failure to do so can result in
a risk of electrical shock, which may cause serious personal injury.
Before product installation, verify that you are installing the
equipment in a properly grounded 3-prong AC receptacle. If not,
stop the installation and contact a qualified service technician.
●
Use only AT&T, Model 846739928, Class 3 wall plug-in unit with this
product.
●
This product must be installed within six feet of the approved ground
AC outlet that the Communications System control unit is connected
to. The green ground wire must be connected to the product ground
terminal and to the AC receptacle ground screw.
●
Never install telephone wiring during a lightning storm.
●
Never install telephone jacks in wet locations unless the jack is
designed for wet locations.
●
Never touch uninsulated telephone wires or terminals unless the
telephone line has been disconnected at the network interface.
●
Use extreme caution when installing or modifying telephone lines.
All wiring that connects to this equipment and becomes part of the
building wiring must be a minimum of CLASS 2 or UL Listed and CSA
Certified Communications cable.
Important Safety Instructions
WARNING: Risk of Electrical Shock
Failure to properly ground this product will result in a risk of
electrical shock, which can cause serious personal injury. This
product requires a property grounded 3-prong AC receptacle for
safe operation. If not properly grounded, stop the installation and
contact a qualified service technician.
●
Read and understand all instructions.
●
Follow all cautions, warnings, and instructions marked on the product.
●
This product can be hazardous if immersed in water.
●
If you suspect a gas leak, report it immediately, but use a telephone
away from the area in question. The telephone’s electrical contacts
could generate a tiny spark. While unlikely, it is possible that this
spark could ignite a heavy concentration of gas. This product is not
approved for use in areas labelled as “explosive environments.” Only
“Explosive Atmosphere Telephones” may be used in such hazardous
environments.
●
To reduce the risk of electric shock, do not disassemble this product.
There are no user serviceable parts inside. Opening or removing
covers may expose you to hazardous voltages. Incorrect reassembly
can cause electric shock when the product is subsequently used.
●
Do not use liquid cleaners or aerosol cleaners. Unplug the wall plugin unit from the wall outlet and remove cords from the modular jacks
on the face of the unit before cleaning. Clean the outside of the unit
only with a damp cloth.
●
Never place this product near or over a radiator or heat register.
●
This product is not designed for outdoor installation. Install the
product only inside the building.
●
The product wall plug-in unit is equipped with a 3-prong plug. This
plug will only fit into a 3-prong receptacle. If you are unable to plug
the wall plug-in unit into the wall receptacle, contact a qualified
service technician to replace your obsolete wall receptacle. Do not
cut or remove the grounding prong from the wall plug-in unit plug or
use 2-wire extension cord or adapter to defeat the grounding safety
feature of the wall plug-in unit connected to the product.
●
Do not allow anything to rest on the power cord to the unit. Do not
locate this product where the cord will be abused by persons walking
on it.
●
Do not overload the wall outlet or extension cords, as this can result
in the risk of fire or electric shock.
●
Unplug the wall plug-in unit from the wall outlet receptacle, remove
the cords from the modular jacks on the faceplate of the unit, and
refer servicing to qualified personnel under the following conditions:
— When the wall plug-in unit power cord is damaged or frayed.
— If liquid has been spilled on the product.
— If the product has been exposed to rain or water.
— If the product does not operate normally by following the operating
instructions. Adjust only those controls that are covered by the
operating instructions because improper adjustment of other
controls may result in damage and will often require extensive
work by a qualified technician to restore the product to normal
operation.
— If the product has been dropped and the housing has been
damaged.
WARNING: Failure to follow these insructions could lead to
personal injury and property damage. It will also void product
warranties on all protected equipment.
SAVE THESE INSTRUCTIONS
Federal Communications Commission (FCC)
Warning Statement
This equipment has been tested and found to comply with the limits for a
Class A dgital device, pursuant to Part 15 of FCC rules. These limits are
designed to provide reasonable protection against harmful interference in
a commercial or residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction booklet, may cause harmful interference
to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this the 122A
OPRE unit does cause harmful interference to radio or television
reception, which can be determined by unplugging the 122A OPRE unit,
the user is encouraged to try to correct the inteference by one or more
of the following measures:
1 Where it can be done safely, re-orient the television or radio antenna.
2 To the extent possible, relocate the television, radio, or other receiver
with respect to the telephone equipment.
3 Plug the 122A OPRE unit into an AC outlet that is not on the same
circuit as the one used by the radio or television.
FCC Notification and Repair Information
The 122A Off-Premises Range Extender (OPRE) is registered with the
Federal Communications Commission (FCC) in accordance with Part 68
rules.
The two network interface jacks are RJ11C. When the OPRE is used as
an off-premises range extender, the Facility Interface Code is OL13C or
metallic depending on the application. When the OPRE is used on the
Central Office line side of a system, the Facility Interface Code is 02LS2.
On the bottom of the OPRE is a label that contains, among other
information, the FCC registration number and ringer equivalence number
(REN) for this equipment. If requested, this information must be
provided to the telephone company.
Registered equipment may not be used with Coin Telephone Lines.
Equipment may be used with Party Lines in areas where state tariffs
permit such connections and when such equipment is applicable for such
service.
Installation must be performed by qualified service persons. Connection
of registered equipment of the telephone network must be through
standard network interface jacks.
Each telephone service company has standards regarding the signals
which will ring devices. This determines the type and number of devices
which can be attached to the line. A Ringer Equivalence Number (REN)
determines the relative value of each device. In most, but not all areas,
the sum of the RENs should not exceed five (5.0). 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 determine the
maximum REN for the calling area.
The telephone company may make changes in it’s facilities, operations,
or procedures that could affect the operation of the equipment. If this
happens, the telephone company will provide advance notice in order for
you to make the necessary notifications in order to maintain
uninterrupted service.
If the 122A OPRE unit causes harm to the telephone network, the
telephone company may disconnect service temporarily. If possible, the
telephone company will try to notify you in advance. If advance notice is
not possible, you will be notified as soon as possible. You will be given
the opportunity to correct the problem and informed of your right to file a
complaint with the FCC.
The OPRE does not affect the performance of hearing-aid-compatible
equipment.
No repairs should be performed by the customer. If trouble is
experienced with this equipment, please contact the following customer
service location for repair and warranty information: 1-800-628-2888 or
write: AT&T General Business Systems, National Service Assistance
Center, 7200 S. Alton Way, Englewood, Colorado, 80112.
CIB 3125
(122A) Off-Premises Range Extender
The 122A Off-Premises Range Extender (OPRE) (Figure 1) allows
various tip/ring interfaces on the MERLIN LEGEND™, MERLIN ® II,
PARTNER ® and System 25 Communications systems to support the
following applicatons:
●
off-premises operation with off-premises station (OPS) and metallic
private line (MPL) services
●
extended range operation, within the building and out-of-building
●
gain for Remote Access, Direct Inward System Access (DISA), and
conferencing applications with loop start lines.
FIGURE 1 122A Off-Premises Range Extender Front Panel
NOTE: The 122A OPRE is intended for use with touch-tone phones
only. The message waiting feature will only operate properly on phones
equipped with LED indicators.
1
PARTS LIST
The 122A OPRE box contains the following parts:
Ground
Wire Lugs
12 AWG
Stranded Green
Ground Wire
(7 Feet)
Mounting
Plate
Double Sided
Adhesive
Ground
Wire Screw
2 Pair D6AP 7 Feet
Telephone Modular Cord
Power Unit
AT&T Model 846739928
122A OPRE Front Panel
Screws
FIGURE 2 122A OPRE Parts List
2
Anchors
Installation Requirements
WARNING: Before installing the 122A OPRE, check the AC outlet
ground connection of the control unit for approved grounding.
Improper grounding can result in a serious safety hazard.
CAUTION: Use only AT&T Power Unit model number 846739928.
●
Before installing the 122A OPRE, verifiy with the telephone company
that the following specification for the telephone lines are available
for the connection of the 122A OPRE to the off-premises station:
— standard jacks (USOC RJ11C)
— Facility lnterface Code (FIC OL13C).
●
Primary protection is required at all network interfaces and the
connections to out-of-building wire runs. Before installing the 122A
OPRE, first ensure that a primary protector is installed and connected
to an approved ground.
NOTE: All installations must follow requirements outlined in NEC
Article 800 of the National Electrical Code Handbook and AT&T
Standard Practice #462-005-100, Station Protection and Grounds.
●
The 122A OPRE must be located and installed within six feet of the
approved ground AC outlet of the control unit. This allows the wire
and modular cord connections sufficient “slack” for operation.
●
When the front panel faces down after the wall mount installation, all
connections to the 122A OPRE (for example, modular jacks, power
unit connectors, and ground wire) must be installed allowing ample
space for access to the front panel. After installation, all connections
(cords) must have enough “slack” to allow the 122A OPRE to be
removed from the wall unit for testing and maintenance.
3
Wall Mounting the 122A OPRE
1 Unpack the 122A Off-Premises Range Extender unit and the package
containing the mounting plate, plastic wall anchors, screws, and
double-sided adhesive.
2 Select a location for the 122A OPRE not more than six feet from the
approved grounded AC outlet.
3 Hold the mounting plate level against the desired location on the wall,
and mark the holes with a pencil or sharp object (Figure 3).
Wall
Mounting
Plate
(use for
markings)
Mounting
Screw
Locations
(Side view)
FIGURE 3 Wall Mount Markings for the 122A OPRE
4 Using a 5/32 inch drill bit, drill a hole through each of the mounting
plate marks on the wall.
4
5 lnsert one of the plastic screw anchors into each of the holes
(Figure 4 A,B).
Screw
Anchor
Leave 1/8 inch
of screw exposed
(do not tighten
flush to wall)
A
B
C
FIGURE 4 Inserting Anchors and Screws for the 122A OPRE
6 Insert and thread the screws into the wall anchors, leaving sufficient
room to mount the wall plate. (Figure 4C).
NOTE: Do not tighten the screws flush to the wall mounting
plate.
5
7 Locate and mount the double-sided adhesive to the mounting plate
(Figure 5).
Mounting
Plate
Wall
Double-Sided
Adhesive
OPRE
(Front Panel)
Mounting
Screw
Locations
(Side view)
FIGURE 5 Mounting Plate with Tape for the 122A OPRE
8 Mount the 122A OPRE unit box to the mounting plate with the front
panel of the unit facing towards the floor (Figure 5).
9 To connect and test the 122A OPRE for operation, refer to one of the
following sections depending on your installation:
6
●
“Connecting the 122A OPRE for Off-Premises and Extended
Range,” “Testing the 122A OPRE for Off-Premises and Extended
Range,” and “Connecting the 122A OPRE with the Remote
Station.”
●
“Connecting the 122A OPRE for Remote Access, DISA, or
Conferencing Applications” and “Testing the 122A OPRE for With
the Loop Start Line of the Control Unit.”
Connecting the 122A OPRE for Off-Premises and
Extended Range
1
Be sure the location for the 122A OPRE not more than six feet from
the approved grounded AC outlet for the control unit.
2
Locate the long grounding screw and replace the existing center
screw of the control unit’s AC outlet.
3
Attach the ground lugs (provided) to both ends of the 12 AWG
stranded green ground wire (provided).
NOTE: The length of this green ground wire is limited to a maximum.
of seven feet. When attaching the wire, be sure to allow “slack” of 1
foot of wire for grounding.
4
Secure one end of this green ground wire to the 122A OPRE’s screw
terminal on the front panel labelled GROUND (Figure 6).
5
Secure the other end of the green ground wire to the approved
ground on the AC outlet into which the control unit is plugged
(Figure 6). See “Grounding Multliple Units” on page 14.
6
Insert the wall plug-in power unit connector into the jack labelled
POWER on the front panel of the 122A OPRE (Figure 6).
7
Insert the AC plug of the power unit into the approved ground on the
AC outlet into which the control unit is plugged (Figure 6).
8
Insert one end of a two-pair D6AP telephone modular cord (provided)
into the jack labelled IN on the front panel of the 122A OPRE
(Figure 6).
9
Insert the other end of this two-pair D6AP telephone modular cord
into the appropriate tip-ring station port on the control unit (Figure 6).
10 Proceed to test the 122A OPRE unit.
TESTING THE 122A OPRE FOR OFF-PREMISES AND EXTENDED
RANGE
NOTE: Verify that all the gain switches are in the ON or up (factory
default) positions.
1
Insert one end of a two-pair D6AP telephone modular cord into a
telephone set.
7
2 Insert the other end of this modular cord into the jack labelled OUT on
the front panel of the 122A OPRE.
3 Place an intercom call to the station port.
4 Verify that the connected telephone set rings.
5 Pick up the telephone handset and answer the call to check for
acceptable voice transmission levels.
6 After checking for acceptable voice transmisson levels, disconnect
the modular jack from the jack labelled OUT on the front panel of the
122A OPRE and the telephone set.
7 Proceed to connect the 122A OPRE with the remote station.
CONNECTING THE 122A OPRE WITH THE REMOTE STATION
1 Insert one end of the two-pair D6AP telephone modular jack into the
jack labelled OUT on the front panel of the 122A OPRE (Figure 6).
8
122A OPRE
Front Panel
AC Outlet
Control Unit
Approved
Ground
Power
Unit
2 Pair D6AP 7 Feet
Telephone Modular Cord
(Not Provided)
Building
Entrance
To
Network
Interface
Jack
Power
Unit
Connector
12 AWG Stranded
Green Ground Wire
(Max. 7 Feet)
OR
Outside
Telephone
Line
*NOTE
To Remote Station
Within Building
2 Pair D6AP
7 Feet
Telephone
Modular Cord
(Provided)
To Tip-Ring
Station Port
or Control Unit
Control Unit
(Allow 1 Foot Slack for All Wires and Cords)
OR
Building
Entrance
To Remote
Station
Out of
Building
Line
*NOTE
*NOTE: Verify primary protector exists at
this point and is connected to an
approved ground
FIGURE 6 Connecting the 122A OPRE With the Remote Station
2 Insert the other end of this two-pair D6AP telephone modular cord
into the interface for the remote station (Figure 6).
3 Place an intercom call to the tip-ring station port connected to the
122A OPRE.
4 Verify that the connected off-premises telephone set rings.
5 Pick up the telephone handset and answer the call to check for
acceptable voice transmission levels.
9
6 For this installation, if voice transmission levels are:
●
Acceptable: the 122A OPRE installation is complete.
●
Not Acceptable: adjust the gain settings. Refer to “Adjusting the
Gain Switches on the 122A OPRE” presented later in this
booklet.
After adjusting the gain switches for acceptable voice
transmission levels, the 122A OPRE installation is complete.
7 After all the connections are completely attached, be sure to hang the
122A OPRE unit on the wall for the wall mount installation.
Connecting the 122A OPRE for Remote Access,
DISA, or Conferencing Applications
1 Be sure the location for the 122A OPRE unit is more than six
feet from the approved grounded AC outlet of the control unit.
2 Locate the long grounding screw and replace the existing center
screw of the control unit’s AC outlet.
3 Attach the ground lugs (provided) to both ends of the 12 AWG
stranded green ground wire (provided).
NOTE: The length of this green ground wire is limited to a maximum
of seven feet. When attaching the wire, be sure to allow “slack” of 1
foot of wire for operation.
4 Secure one end of the green ground wire to the 122A OPRE’s screw
terminal on the front panel labelled GROUND (Figure 7).
5 Secure the other end of the green ground wire to the approved
ground on the AC outlet into which the control unit is plugged (Figure
7). See “Grounding Multiple Units” on page 14.
6 Insert the power unit connector into the jack labelled POWER on the
front panel of the 122A OPRE (Figure 7).
7 Insert the AC plug of the wall plug-in power unit into the approved
ground on the AC outlet into which the control unit is plugged
(Figure 7).
10
8 Insert one end of a two-pair D6AP telephone modular cord into the
jack labelled IN on the front panel of the 122A OPRE (Figure 7).
9 Insert the other end of this two-pair modular cord into the network
interface connection to the telephone company Central Office line
(Figure 7).
10 Proceed to test the 122A OPRE unit.
TESTING THE 122A OPRE FOR REMOTE ACCESS, DISA, OR
CONFERENCING APPLICATIONS
NOTE: Verify that all the gain switches are in the ON (up or factory
default) position.
1 Insert one end of a two-pair modular cord into the jack labelled OUT
on the front panel of the 122A OPRE (Figure 7).
Control Unit
2 Pair D6AP 7 Feet
Telephone Modular
Cord (Provided)
122A OPRE
Front Panel
Power
Unit
AC Outlet
Control
Unit
Approved
Ground
Power
Unit
Connector
12 AWG Stranded
Green Ground Wire
(Max. 7 Feet)
2 Pair D6AP
7 Feet
Telephone
Modular Cord
(Not Provided)
Network
Interface
To
Network
Interface
Central Office
Telephone Line
*NOTE
(Allow 1 Foot Slack for All Wires and Cords)
*NOTE: Verify primary protector exits at
this point is connected to an
approved ground
FIGURE 7 Connecting the 122A OPRE for Remote Access, DISA, or
Conferencing
11
2 Insert the other end of this modular cord into the line jack of the
control unit (Figure 7).
3 Place a call to the Central Office line connected to the 122A OPRE.
4 Verify that one of the station sets associated with the Central Office
line rings at the control unit.
5 Pick up the telephone handset and answer the call to check for
acceptable voice transmission levels.
6 For this installation, if voice transmission levels are:
●
Acceptable: the 122A OPRE Remote Access, DISA, or
Conferencing installation is complete.
●
Not Acceptable: adjust the gain settings. Refer to “Adjusting Gain
Switches on the 122A OPRE” in the next section of this booklet.
After adjusting the gain switches for acceptable voice
transmission levels, the 122A OPRE DISA/Conferencing
installation is complete.
7 After all the connections are completely attached, be sure to hang the
122A OPRE unit on the wall for a wall mount installation.
Adjusting the Gain Switches on the 122A OPRE
The 122A OPRE unit provides variable gain for voice transmission
levels. The voice transmission levels can be adjusted using the switches
labelled GAIN located on the 122A OPRE front panel. The level of gain
is dependent on the installation of the 122A OPRE unit and may not be
necessary. The gain setting is dependent on the loop lengths associated
with the installation: short loop lengths may require zero (no gain) to
moderate gain adjustments and longer loop lengths may require
moderate to high gain adjustments.
12
Table 1 provides guidelines for setting gain using the 122A OPRE
switches if the loop length is known for either of the following installation
configurations:
●
Off-premises and extended range: loop length from the jack labelled
OUT to the remote station
●
Remote Access DISA, or Conferencing: loop length from the Central
Office to the jack labelled IN.
Either of two methods may be used to determine the correct gain setting
for a given OPRE installation. One involves measuring the loop
resistance with an ohmmeter, then determining loop length from the
measurement. The second method requires measuring AC output of a
DTMF telephone at the telephone and then at the OPRE to determine
the loss in the line. Note that either method requires at least two people,
and/or that the technician make several trips between the OPRE
installation site and the off-premises site.
Method 1: Before connecting the off-premises line to the OPRE, place a
short across Tip and Ring of the line at either end. At the other end,
measure the resistance from Tip to Ring. Divide the resistance (in
ohms) by 83. The result equals the loop length in thousands of feet.
Now refer to Table 1 on the following page for the correct gain setting.
Method 2: With the OPRE completely installed, verify operation of the
off-premises telephone by going off-hook and listening for dial tone. If
possible, place a call to another station on the system. Have the
receiving end place the call on hold. With an AC voltmeter, measure the
voltage across Tip and Ring at the telephone with dialpad “1” depressed.
At the OPRE, measure the AC voltage across Tip and Ring on the IN
port. Adjust the gain switches until the voltage measurements are as
closely matched as possible. Retrieve the call from hold at the called
station, and release the dialpad.
Similar procedures should be used when installing an OPRE between an
incoming CO line and a line port of a swtich.
With either method it will be necessary to assess the level and quality of
normal speech during a call. Refer to Table 1 and adjust the gain up or
down as necessary.
NOTE: Excessive gain can cause cross-talk or “squealing” on the line.
13
Table 1: Gain Switch Settings for the 122A OPRE
Switch
1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
2
3
4
Gain (dB)
Loop Length (ft.)*
ON
ON
ON
ON
ON
ON
ON
ON
NONE
2
4
5
7.5
8.5
9.5
11.0
0 to 3000
3000 to 5000
5000 to 7000
7000 to 9000
9000 to 11,000
11,000 to 13,000
13,000 to 15,000
15,000 to 17,000
* 26 AWG
NOTE: Be sure to complete the 122A OPRE installation connections
after adjusting the gain swtiches for any installation configuration in this
booklet.
Grounding Multiple Units
Multiple OPREs may be grounded at the same outlet provided the
groundng screw is of sufficient length to securely fasten the ground wire
terminals. Up to six OPREs may be grounded with a single 12 AWG
ground wire by connecting the units together with short lengths (6 in.
max.) of the enclosed ground wire, with the terminals properly installed
on each end. The total length of the ground wire must not exceed 10
feet.
14