INTUITY CONVERSANT System Version 6.0
MAP/100 New System Installation
585-310-176
Issue 3.0
June 1997
Making Cable Connections
Page 3-10
Digital Connections
3
You can connect the MAP/40 T1 circuit cards to the standard T1 carrier directly
to a DS1 terminal block or through the following types of customer premise
equipment:
■
Channel Service Unit (CSU)
■
Automatic call distributor (ACD)
■
Private branch exchange (PBX)
You
must
use a CSU if any
of the following situations applies to your MAP/40
setup:
■
The system is more than 200 meters (655 ft.) from the signal source. The
signal source may be a DSX or the last T1 repeater. In this case, the CSU
regenerates the received signal and properly attenuates the transmitted
signal to prevent crosstalk.
■
The system is terminating the T1 trunk from outside the building. In this
situation, the CSU provides the primary lightning and surge protection as
required by FCC Part 68.
■
The T1 loop is not dry (that is, is powered by either 110 VAC or +24 or
-48 VDC sources).
■
You want to use the remote loopback or extended super frame
maintenance features. In this case, the CSU recognizes the in-band bit
patterns that signal it to loop back the incoming signal or to perform other
maintenance functions.
Connecting T1 Circuit Cards to a CSU
On some types of CSUs, the connector on the T1 cable plugs into the AYC3B,
AYC11, or AYC21 circuit card and the cable terminates at a 15-pin D
subminiature connector to the CSU.
On other types, you must cut off the CSU connector and slide latch and strip and
connect the wires.
displays the AYC21 circuit card connection. The
information below applies to cables used to connect to the AYC11 and AYC3B
circuit cards:
■
Orange = our T1 = signals to the system and should connect to a CSU or
Network “T”
■
White/Orange = our R1 = signals to the system and should connect to a
CSU or Network “R”
■
Green = our T = signals from the system and should connect to a CSU or
Network “T1”
■
White/Green = our R= signals from the system and should connect to a
CSU or Network “R1”