Csu Rear Panel Pin Assignments - AT&T MERLIN LEGEND Installation & Maintenance Manual

Installation
Table 3-25 CSU Rear-Panel Pin Assignments
100D Module
PIN # DESIG
1 T1
2 R1
4 R
5 T
DC Power Options
Depending on the type of line provided by the local telephone
company, the CSU can be supplied with -48 VDC power on the
T`wire pair from the network. If the CSU is not powered from the
network, a KS22911,L1 power supply is required. Connect the
power supply to the rear panel at TB1 as follows:
positive lead to terminal 15
-48 VDC lead to terminal 14
3-44 Channel Service Unit
SIGNAL D-CONN
RCV (tip) 3
RCV (ring) 11
XMT (ring) 9
1
XMT tip)
551 T1 L1 CSU
DESIG SIGNAL
T XMT (tip)
R XMT (ring)
R1
RCV (ring)
T1 RCV (tip)