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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Troubleshooting
6-8Troubleshooting ATM-CES
6
Administration
Is DEFINITY ECS ATM-CES administered correctly?
D-channel problems.
If the D-channel does not come up following CES
administration, use the following steps to troubleshoot the cause.
Table 6-5. Troubleshooting CES
√ Step Action Description
1. Verify PVC is correctly
administered
Check VPI/VCI (change signaling-group
siggrpnbr
,
screen 2)
2.
Check channel
number
Check that both ends of the emulated circuit have the
same number of channels (change signaling-group
siggrpnbr
, screen 2).
3. Check trunks Both ends of the emulated circuit have the same number
of trunks (change trunk-group
trkgrpnbr
, screen 6).
NOTE:
A trunk group can contain either ISDN or ATM trunks
but not both.
4. Check channels Both ends of the emulated circuit use the same channel
numbers (change signaling-group
siggrpnbr
, screen 2).
Use the same channel numbers for the port to channel
mapping (page 2) for the other end. See ‘‘Changing the
port-to-channel mapping’’ on page 5-22 for more
information.
5. Check maximum
number of emulated
circuits
The maximum number of emulated circuits (signaling
groups) on a single ATM circuit pack is 8.
■ Each circuit pack can have more than one signaling
group and more than one D-channel
■ The D-channel from one emulated circuit cannot
signal for the bearer channels of another emulated
circuit (no Nonfacility Associated Signaling for virtual
circuits).
6. Check minimum ports
for emulated circuit
A minimum of 7 ports must be administered for each
emulated circuit as follows:
■ at least 6 bearer (B) channels
■ one signaling (D) channel (required)
Continued on next page