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Troubleshooting: Span Control Link
6-20 1X SC4812T–MC BTS Optimization/ATP 5/21/04
DRAFT
Span Problems (No Control
Link)
Perform the procedure in Table 6-25 to troubleshoot a control link
failure.
Table 6-25: Troubleshoot Control Link Failure
n Step Action
1 Connect the CDMA LMF computer to the MMI port on the applicable MGLI/GLI as shown in
Figure 6-1 or Figure 6-2.
2 Start an MMI communication session with the applicable MGLI/GLI by using the Windows
desktop shortcut icon.
3 Once the connection window opens, press the CDMA LMF computer Enter key until the GLI
prompt is obtained.
4
At the GLI prompt, enter:
config ni current <cr> (equivalent of span view command)
The system will respond with a display similar to the following:
The frame format in flash is set to use T1_2.
Equalization:
Span A – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span B – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span C – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span D – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span E – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span F – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Linkspeed: Default (56K for T1 D4 AMI, 64K otherwise)
Currently, the link is running at the default rate
The actual rate is 0
NOTE
Defaults for span equalization are 0–131 feet for T1/J1 spans and 120 Ohm for E1.
Default linkspeed is 56 kbps for T1 D4 AMI spans and 64 kbps for all other types.
There is no need to change from defaults unless the OMC–R/CBSC span configuration requires it.
5 The span configurations loaded in the GLI must match those in the OMCR/CBSC database for the
BTS. If they do not, proceed to Table 6-26.
6 Repeat steps 1 through 5 for all remaining GLIs.
7 If the span settings are correct, verify the edlc parameters using the show command.
Any alarm conditions indicate that the span is not operating correctly.
S Try looping back the span line from the DSX panel back to the MM, and verify that the looped
signal is good.
S Listen for control tone on the appropriate timeslot from the Base Site and MM.
6