Facility Test Calls; Trunk Test Call - Avaya MCC1 Maintenance Procedures

2 Be aware that there are installations that use repeated metallic lines between the MUX and the
"dumb" block. These lines require DC power for the repeaters and this DC power is present at the
"dumb" block interface to the CPE equipment. A loopback jack is required in this configuration
to properly isolate and terminate the DC power.
To check for the presence of DC, make the following four measurements at the network interface jack:
1 From Transmit Tip (T, Pin 5) to Receive Tip (T1, Pin 2)
2 From Transmit Ring (R, Pin 4) to Receive Ring (R1, Pin 4)
3 From Transmit Tip (T, Pin 5) to Transmit Ring (R, Pin 4)
4 From Receive Tip (T1, Pin 2) to Receive Ring (R1, Pin 4)
Every measurement should read 0 (zero) volts DC. For pin numbers and pin designations, refer to
DEFINITY Communications System Generic 1, Generic 2 and Generic 3 V1 and 2 - Integrated Channel
Service Unit (CSU) Module Installation and Operation, 555-230-193.

Facility test calls

The facility test calls feature allows you to use a voice terminal to make test calls to specific trunks, time
slots, tones, and tone receivers within the system. The test call verifies that the accessed component is
functioning properly. To use this feature, it must be enabled on the Class of Restriction screen, and you
must know the facility test call access code. The code can be retrieved by entering
access-codes . It appears on page one of the screen output.
NOTE:
For the ISDN-PRI test call feature see
The following test call descriptions are for voice terminal users.

Trunk test call

The facility test call feature allows you to use a voice terminal to make test calls to specific trunks within
the system. The test call verifies that the accessed component is functioning properly. To use this feature,
it must be enabled on the Class of Restriction form, and you must know the facility test call access code.
The code can be retrieved by entering the SAT command
page one of the screen output.
The trunk test call accesses specific tie or CO trunks, including DS1 trunks. If the trunk is busied out by
maintenance, it will be temporarily released for the test call and returned to busyout afterwards. Before
making the test call, use
test. DID trunks cannot be accessed.
NOTE:
Do not use this trunk test call procedure to test ISDN-PRI or ATM-CES trunks. For more
information about testing ISDN-PRI or ATM-CES trunks, see ATM-BCH, Test #258.
Maintenance Procedures
December 2003
to determine the location of the trunk ports that you want to
list configuration
Additional maintenance procedures
Troubleshooting ISDN-PRI test calls
display feature-access-codes
Facility test calls
display feature-
on page 215.
. It appears on
367