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 pack. Ports 2
and 3 are Digital Ports. The Maintenance/Test Digital Port provides the ability to
perform digital (i.e., ISDN-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 pseudo-random data along the connected B-channel.
The far end loops back this data, and the Maintenance/Test Digital Port
compares the data to that which was sent. Errors are recorded on a bit and block
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 determines that the digital port is operating incorrectly.
NOTE:
An alarm on the Maintenance/Test Digital Port reduces service, but does
not block it since the ISDN-TRK has other means to determine the health 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 Run
1
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
