DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1108M/T-DIG (Maintenance/Test Digital Port)
9
M/T-DIG (Maintenance/Test Digital
Port)
The Maintenance/Test Digital Port is a port on the TN771D circuit pac k. Ports 2
and 3 are Digital Ports. The Maintenance/Test Digital Port provides the ab ility to
perform digital (i.e., I SDN-PRI) trunk testing via the TDM Bus. For an ISDN-PRI
test call, connections are set up in the system as shown in Figure 9-66.
When the Maintenance/Test Digital Port is participating in an ISDN-PRI test call,
the port sends a stream of pseud o-random data along the c onnected B-channel.
The far end loops back this d ata, and the Maintenance/Test Digital Port
compares the data to that whic h was sent. Errors are recorded on a bit and b lock
basis. Refer to ISDN-TRK (DS1 ISDN Trunk) Maintenance documentation for
more information on ISDN-PRI test calls.
The Maintenance/Test Digital Port maintenance ensures that the digital trunk
testing function is operating correctly. The Maintenance/Test Digital Port is
alarmed if maintenance d etermines that the digital por t is operating incorrectly.
NOTE:
An alarm on the Maintenance/Test Digital Port reduces servic e, but does
not block it since the ISDN-TRK has other means to determine the healt h of
the ISDN-PRI trunk facility. However, to accurately measure the error
performance and to ensure accuracy of the health of the ISDN-PRI trunk,
the Maintenance/Test circuit pack should be replaced when a new circuit
pack is available.
MO Name As It
Appears in
Alarm Log Alarm
Level
Initial System
Technician Command
to Run1
1. UU is the universal cabinet number (1 for PPN, 2 - 44 for EPNs). C is the carrier
designation (A, B, C, D, or E). SS is the number of the slot in which the circuit pack
resides (01 to 21). pp is the two digit port number (01, 02, ...).
Full Name of MO
M/T-DIG Minor test port UUCSSpp l Maintenance/Test
Digital Port
M/T-DIG Warning release port UUCSSpp Maintenance/Test
Digital Port