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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-171BRI-PORT (ISDN-BRI Port), ABRI-PORT (ASAI ISDN-BRI Port)
10
■ A Loop Around Test across the TDM Bus for B1.
■ A Conference Circuit Test for B1.
■ A Loop Around Test across the TDM Bus for B2.
■ A Conference Circuit Test for B2.
The tests are run in the above order. If one fails, the remaining tests in the
sequence are not executed. An error code is returned at that point.
This test is not executed for ABRI-PORT/ATT-PORT/LGATE-PT/ATTE-PT because
the B-channels associated with the port are not used by ASAI or AT&T adjuncts.
The dotted lines in Figure 10-8 show how a Loop Around Test is performed for
the B-channels. The figure shows a terminal connected to a BRI line board using
a TN556. If a TN2198 is used, the terminal would be connected to a NT1, and the
NT1 to the BRI board.
Figure 10-8. Path of the BRI Port Local TDM Loop Around
Tone
Generator
Tone
Detector
BRI Line
Board
TDM Bus