User Manual

Isolate Span Lines/Connect LMF

July 1999

3-3

SC 4812ET BTS Optimization/ATP – CDMA LMF

PRELIMINARY 2

Isolate BTS from T1/E1 Spans

– At active sites, the OMC/CBSC must disable the

BTS and place it out of service (OOS). DO NOT

remove the span surge protectors until the

OMC/CBSC has disabled the BTS!

IMPORTANT

Each frame is equipped with one 50 pair punchblock for spans, customer

alarms, remote GPS, and power cabinet alarms (see Figure 3-1 and

Table 3-1). To disable the span, pull out the surge protectors for the

respective span.

Before connecting the LMF to the frame LAN, the OMC/CBSC must

disable the BTS and place it OOS to allow the LMF to control the

CDMA BTS. This prevents the CBSC from inadvertently sending

control information to the CDMA BTS during LMF based tests.

Alarm and Span Line Cable

Pin/Signal Information

Table 3-1 lists the complete pin/signal identification for the 50–pin

punch block.

Channel Service Unit

The channel service unit (CSU) contains a modular Eternet jack on its

fron panel, allowing Eternet UP access to CSUs installed in the same

shelf Each 19 inch rack can support two CSU (M–PATH 538) modules.

Each module supports one span connection. Programming of the CSU is

accomplished through the DCE 9–pin connector on the front panel.