If the Trunk Group screen displays TestCall BCC field, ensure that the TestCall BCC field indicates the correct BCC for the service provisioned on the ISDN-PRI trunk. The TestCall BCC values are defined as follows:
Value
Description
0
Voice
1
Digital Communications Protocol Mode 1
2
Mode 2 Asynchronous
3
Mode 3 Circuit
4
Digital Communications Protocol Mode 0 (usually the default).
If the ISDN-PRI trunk is of type cbc, make sure the TestCall Service field on the Trunk Group screen indicates the correct service so that a network facility message can be sent across the ISDN-PRI network.
If the outgoing ISDN-PRI test call keeps aborting, make sure that the far-end device can handle DCP Mode 0 or DCP Mode 1.
Note:
Before attempting to make an ISDN-PRI test call to the public network (that is, the network is the far end), make sure that test call service is provisioned by the network. The user must subscribe to Test Type 108 service and have the correct far-end test call number administered on the Trunk Group screen for the call to be made.
