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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Troubleshooting
6-29Troubleshooting ATM-PNC
6
Signaling sequences.
Use the information in Table 6-10
to help determine trouble
with ATM signaling. Abbreviations used in this table correspond to those in
Figure 6-2
.
ATM switch administration
Is the ATM switch administered correctly?
To verify that a specific Lucent ATM switch was administered correctly, refer to
the appropriate reference guide.
Table 6-10. ATM signaling sequences
Signaling between the PPN and the
EPN Call between EPN2 and EPN 3
1. TN2305/TN2306 circuit pack in the
PPN establishes a variable bit-rate
switched virtual connection
(VBR-SVC) for DEFINITY ECS
signaling through the ATM switch to
each EPN.
Station goes off hook in EPN2. CCMS
messages sent over the already
established EAL to call processing in
the PPN.
2. TN2305/TN2306 circuit pack in the
PPN establishes EAL and PACL links
with each EPN within the above
VBR-SVC.
Call Processing sends a message
over the PACL to the
TN2305/TN2306 circuit pack in EPN2
to establish a connection to the
TN2305/TN2306 circuit pack in
EPN3.
3. Links come up TN2305/TN2306 circuit pack in EPN2
sends an ATM signaling message to
the ATM switch to establish a
CBR-SVC link to the TN2305/TN2306
circuit pack in EPN3.
4. Call processing in the PPN sends
CCMS messages to the station in
EPN2 over the already-established
EAL.
5. Repeat steps 2 through 4 for the
EPN3 to EPN2 connection.
Continued on next page