User's Manual

Span Lines - Interface and Isolation

68P09255A69-3

Aug 2002

1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x

PRELIMINARY

3-12

Span Lines - Interface and Isolation

T1/E1 Span Interface

NOTE

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.

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

customer alarms, remote GPS, and BTS frame alarms. See Figure 3-4

and refer to Table 3-6 for the physical location and punchdown location

information.

Before connecting the LMF computer to the frame LAN, the

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

the LMF to control the BTS, and prevent the CBSC from inadvertently

sending control information to the BTS during LMF-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 LMF will maintain control of the BTS. To disable

the spans, disconnect the BTS-to-CBSC Transcoder span cable

connectors from the Span I/O cards (Figure 3-2).

Figure 3-2: Disconnecting Span Lines

Span Line Cable

Connectors

4812ETL0020-1