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Communication Manager Maintenance-Object Repair Procedures
1512 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
PSTN Fallback
Public Switched Telephone Network (PSTN) fallback is available on the Internet trunk
application software, which periodically pings the remote destinations that the software calls.
When the far end returns a poor response time to the ping, ARS or AAR network routing
patterns bypass those ports and direct the call to another port, typically on a PSTN trunk.
When the remote destinations show acceptable response times to subsequent pings, the
corresponding ports are returned to “idle,” where they are available for service.
Cabinet Configuration
Because of overheating, the TN802 circuit pack should not be placed directly above or below
another MAPD circuit pack.
UPS Protection
An uninterruptable power supply (UPS) protection is strongly recommended for a PN containing
a TN802 circuit pack.
Faceplate
Figure 84: TN802 faceplate on page 1513 shows the TN802 faceplate.