The DS1 Tie Trunk Seizure Test verifies the trunk’s signaling capability. The test is composed of two parts. The first part queries the media module for errors. The second part of the test sends a seizure message to the DS1 Interface media module and expects an active reply by the DS1 Interface media module. If the system does not receive any reply and the timer expires, the test fails.
This second part of this test cannot be run on a trunk if one of the following cases is true:
The trunk direction is administered as an incoming only trunk.
The trunk is the 24th port on a DS1 Interface media module which is administered using 24th common-channel signaling.
The trunk has been seized by a normal trunk call.
The trunk is administered with maintenance test disabled.
The outgoing signal type of the trunk is either automatic or immediate-start.
