User Manual

Span Lines – Interface & Isolation – continued
3-14 1X SC4812T–MC BTS Optimization/ATP 5/21/04
DRAFT
Isolate BTS from T1/E1 Spans
To ensure the LMF will maintain control of the BTS, disable the BTS
and isolate the spans as described in Table 3-4.
Table 3-4: T1/E1 Span Isolation
Step Action
1 Have the OMC/CBSC place the BTS OOS.
2
Remove the T1/E1 span 50–pin TELCO cable connected to the SPAN I/O cards
(Figure 3-2).
NOTE
– If a third party is used for span connectivity, the third party must be informed
before disconnecting the span line.
– Verify that the SPAN cable connector is removed, not the “MODEM/TELCO”
connector.
Figure 3-2: Span I/O Board Span Isolation
50–PIN TELCO
CONNECTORS
REMOVED
SPAN A CONNECTOR
(TELCO) INTERFACE
TO SPAN LINES
SPAN B CONNECTOR
(TELCO) INTERFACE
TO SPAN LINES
TOP of Frame
(Site I/O and Span I/O boards)
RS–232 9–PIN SUB D
CONNECTOR SERIAL
PORT FOR EXTERNAL
DIAL UP MODEM
CONNECTION (IF USED)
FW00299
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