User's Manual Part 2

Span Lines – Interface and Isolation

MAY 2004

1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU

PRELIMINARY

6-16

T1/E1 Span Interface

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

and place it out–of–service (OOS). DO NOT remove the

span line cable connectors until the OMC–R/CBSC has

disabled the BTS.

NOTE

Before connecting the WinLMF computer to the BTS LAN, the

OMC–R/CBSC must disable the BTS and place it OOS. This will allow

the WinLMF to control the BTS, and prevent the CBSC from

inadvertently sending control information to the BTS during

WinLMF–based tests.

Isolate BTS from T1/E1 Spans

Once the OMC–R/CBSC has disabled the BTS, the spans must be

disabled to ensure the WinLMF will maintain control of the BTS.

T1/E1 Span Isolation

Table 6-5 describes the action required for span isolation.

Table 6-5: T1/E1 Span Isolation

Step Action

1 Have the OMC–R/CBSC operator place the BTS OOS.

2 To disable the span lines, disconnect the span or spans from the CBIO Network Span–1X or Group 1

Span–EVDO sockets.

If in an outdoor configuration, then unlock and open TME left side door to gain access to rear of BTS.