User's Manual

Isolate Span Lines/Connect LMF68P09255A61-4
Aug 2002
1X SC 4812T BTS Optimization/ATP Software Release 2.16.1.x
FIELD TRIAL
3-5
Isolate Span Lines/Connect LMF
Isolate BTS from T1/E1 Spans
NOTE
At active sites, the OMC/CBSC must disable the BTS and place
it out of service (OOS). DO NOT remove the 50-pin TELCO
cable connected to the BTS frame site I/O board J1 connector
until the OMC/CBSC has disabled the BTS!
Each frame is equipped with one Site I/O and two Span I/O boards. The
Span I/O J1 connector provides connection of 25 pairs of wire. A GLI
card can support up to six spans. In the SC 4812T configuration, the odd
spans (1, 3, and 5) terminate on the Span “A” I/O; and the even spans (2,
4, and 6) terminate on the Span “B” I/O.
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. Refer to
Figure 3-1 and Figure 3-2 as required.
Table 3-1: T1/E1 Span Isolation
Step Action
1 From the OMC/CBSC, disable the BTS and place it OOS. Refer to SC OMC-R/CBSC System
Operator Procedures.
- The T1/E1 span 50-pin TELCO cable connected to the BTS frame SPAN I/O board J1 connector
can be removed from both Span I/O boards, if equipped, to isolate the spans.
NOTE
If a third party is used for span connectivity, the third party must be informed before disconnecting the
span line.
Verify that you remove the SPAN cable, not the “MODEM/TELCO” connector.
Figure 3-1: Span I/O Board T1 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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