Install Interconnect Wiring
Summary: Ensure the telephone company wiring is properly installed and tested before connecting any
wiring to the Telecenter. Then, install the interconnect wiring by referring to the general
interconnect drawings on the following page and those developed specifically for this system.
Step 1. If a Key
System is
installed, ensure it has been properly wired and programmed: Then
connect the twisted pairs for each line to the appropriate LLM terminals representing their
assigned physical number. Refer to the
Interconnect Layout Drawing
from the Interconnect
Planning Section, the Key
System’s Manual,
the
Physical Number Layout Worksheet
from
the Planning Section, and TCIV Key System Wring
Drawing KM0717.
Note:
Use the
key system manual for details on wiring and configuring options (e.g.: audible ringing
from which lines to which phones, etc.). KM0717 shows general wiring information for a
standard key system. The TC440O console has its own manual covering installation, set-up,
and test.
Step 2. If required, ensure service request is available and applied to terminal CS on the
COA
(TC4171)
(refer to
Drawing KC1475).
If not, the keep-alive process may be used to handle
disconnects from DISA trunks.
Step 3. If ground-start trunks are being used, ensure ground lines have been installed and tested
between the affected COA’s and Central Office or PBX.
Step 4. Remove each COA and set the jumper to the left of the transformer as required.
PBX Lines
6OO Ohms
Central Office 900 ohms
Step 5. Install
Repeater Amplifier Power Supply Chassis and Modules as
detailed on KM0716.
Ensure the power supply is properly grounded to minimize crosstalk and digital noise on the
line. Avoid setting the amplifier gain too high: 6db is typical.
Step 6. Refer to the
Interconnect Layout Drawing
and the
Interconnect Types
figure on the next
page to determine how the interconnect lines should be connected in the system.
Step 7.
C o n n e c t
the twisted pair from each incoming interconnect line to the CT and
CR
terminals of
the COA representing their assigned physical numbers. The physical number and directory
number represented by each COA should be marked on the chassis in front of each COA.
Refer to the
Physical Numbers Layout Plannin g Worksheet
from the Planning Section and
Drawing KM0716.
Note: If the Central Office or PBX
automatically hunts
for a line when contacting the TCIV, wire
the first choice of the C.O. or PBX to the interconnect line with the highest physical number
in the hunt group. Since the TCIV hunts upward, this will reduce the probability of collision
between incoming and outgoing calls.
Step 8. For “outgoing only” interconnect lines, remove the LLM
Ul
line hybrid serving the associ-
ated COA module. This prevents the COA from establishing loop current or a service request.
Outside callers will hear ringing but cannot get an answer.
Step 9.
For “incoming only” interconnect lines, refer to the Programming Section and:
Do not program the line for single digit dialing (Location Codes 64016-34).
Assign a non-accessible architectural number (901 if using dial ‘9’ for outside access).
Set the hunt bit (A:8) off on the preceeding line.
© 1989 Rauland-Borg Corporation (Orig. 10/88; Rev. l/89)
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