Verilink C100 (880-502893-001) Product Manual - Manual (Page 24)

Installation
2-2 Verilink C100 and C150 T1/FT1 CSU/DSU 06/12/97
When installing a system with a DSX1 channel, keep it disabled
through the initial installation and testing until both units are
communicating with each other across the Network. Then the DSX1
channel should be enabled and tested.
After the unit passes the power-on self-test and has been programmed,
connect the T-1 Network Interface cable Part # CB8S0002 or CB8S0003
to the RJ48C on the rear of the unit labeled NI for Network Interface.
Plug the other end of the cable into the smart jack provided by the T-1
carrier.
Look at the LEDs on the front panel. All the LEDS on the front panel
should be off except for the NI Line LEDs. The NI Line TX (data) and
RX (data) LEDs may be on, off or blinking. The NI Line LED labeled
LCK (Frame Lock) should be solid green. If it is, the unit is now
communicating with the T-1 line. Perform this procedure at both ends
of the T-1 facility. Before connecting any channels at either end, both
units must have the NI Line LCK LED solid green.
When connecting channel cables, always secure them with the
provided screws. This will help avoid future intermittent problems.
Connect the appropriate channel cables at both ends and the system
should now be operational.
If a DSX1 channel is being used now is the time to reprogram the units
to enable them at both ends. Connect the proper DSX1 cables at both
ends and check out PBX to PBX operation.
If any questions arise prior to installation or if any problems occur
during installation, call Verilink Customer Service for assistance.