DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1000MAPD-BD (MAPD Interface Circuit Pack TN802)
9
PSTN fallback feature
The Public Switched Telephone Network (PSTN) fallback feature is available on
the Internet trunk applic ation software, which periodi cally pings the remote
destinations that the software calls. When the far end returns a poor response
time to the ping, DEFINITY’s ARS or AAR network routing patterns bypass those
ports and direc t the call to another port, typ ically on a PSTN trunk.
When the remote destinations show accep table response times to sub sequent
pings, the correspo nding ports are returned to “idle,” whe re they are available for
service.
Cabinet configuration
Because of overheating, the TN802 circ uit pack should not be placed d irectly
above or below another MAPD circ uit pack.
UPS protection
Because Windows NT is more vulnerable to damag e from a power interruption
than the DEFINITY ECS, uninterrupted power sup ply (UPS) protection is strongly
recommended for systems using the TN802 circuit pac k.
2. Select utility In the IP Trunk Backup/Restore Utility dialog
screen, click Files, Restore.
The IP Trunk Backup screen appears
3. Select restore In the IP Trunk Backup screen, click on the
Restore button.
4. Wait Wait until the yellow Disk-In-Use LED (Note 5 in
Figure 9-54) light is out.
Table 9-386. Restore TN802 administration data — Continued
Step Description Comments
Continued on next page