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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Troubleshooting
6-37Troubleshooting ATM-PNC
6
ATM call control
Are ATM signaling connections being setup to ATM switch Call Control?
The UBR virtual circuits between the ATM switch PPN port and ATM switch port
and between the
EPN port and ATM switch port are ATM signaling channels
between the port network and the ATM switch. They are used to request
connection setups and releases to other end points such as another port
network. These are established by each TN2305/TN2306 when it comes up,
independent of DEFINITY Call Processing.
Other UBR virtual circuits may exist between ATM switch ports that are not
associated with DEFINITY port networks and may be signaling channels for other
applications (for example, data network traffic).
Call processing (CaPro) Layer
Are control channels being established from the PPN to the EPN?
Diagnostics.
■ Do you get a dial tone on a set on the port network in question?
■ Can you ring a set on the EPN dialing from the PPN and vice-versa?
Table 6-11. Observed Cause Codes
Cause
Code Definition Observed Cause
3 No route to destination The ATM addresses administered in the ATM switch or
in DEFINITY (display atm pnc) are incorrect.
31 Normal, unspecified This is a normal return.
41 Temporary failure This “try again later” cause code has been observed
when the source of the problem is on another port (for
example, a routing problem on another port that
displays cause code 3).
47 Resources unavailable,
unspecified
DEFINITY call volume is too high for the available
resources in the ATM network.
63 Service or option unavailable,
unspecified
DEFINITY call volume is too high for the available
resources in the ATM network.