The asynchronous method requires a Maintenance/Test circuit pack to be present in the system. In this method, four (4) commands are used to start, stop, list, and query an outgoing ISDN-PRI test call:

Start:	test isdn-testcall grp/mbr [minutes]
Stop:	clear isdn-testcall grp/mbr
List:	list isdn-testcall
Query:	status isdn-testcall grp/mbr

Before placing an outgoing ISDN-PRI test call, verify that the feature access code has been administered on the Feature Access Code (FAC) screen (display feature-access-code), and that the Far-End Test Line Number and TestCall Bearer Capability Class (BCC) have been administered on the Trunk Group screen. If the ISDN-PRI trunk is cbc (call by call) service type, the Testcall Service field on the Trunk Group screen must also be administered.

To initiate an outgoing ISDN-PRI test call with the asynchronous method, issue the start command listed above, which enables you to specify a specific the trunk on which to originate the ISDN-PRI test call. An optional qualifier can be used that specifies in minutes (1 to 120) the duration of the test call. If no duration is specified, the default is either 8.4 or 9.6 seconds.

The figure shows a typical response to the test isdn-testcall command:

The functions of the clear, list, and status commands associated with the ISDN Testcall are summarized in Procedure.

• clear isdn-testcall: enables you to cancel an in-progress ISDN-PRI test call and start another test call.

• list isdn-testcall: enables you to list every ISDN-PRI trunk in use for an ISDN-PRI test call in the system.

• status isdn-testcall: enables you to check the progress of an outgoing test call. When an outgoing ISDN-PRI test call completes in a specific PN, another ISDN-PRI trunk from the same PN is available for testing (regardless of whether the status information has been displayed).