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MERLIN LEGEND Communications System Release 6.1
Installation
555-661-140
Issue 1
August 1998
Connecting the Control Unit to the Network Interface
Page 4-13
Testing Trunks
RJ48C/X Interface
The RJ48C/X interface terminates a DS1 trunk at the customer’s
premises. Both RJ48C and RJ48X interfaces have 8-wire modular jacks.
However, the RJ48X interface includes shorting bars that loop the DS1
trunk’s receive pair to the transmit pair. This helps in testing the DS1
trunk from the central office.
Testing Trunks
Before you connect the central office trunks to the control unit, verify that
there is dial tone and that you can dial out on every trunk. DID trunks
can be tested only through the control unit.
Do not
test DID trunks at this
time.
!
CAUTION:
Do not use analog multiline telephones or MLX telephones
for testing. They do not work for these tests and can be
damaged if you use them for this purpose.
Testing Loop-Start Trunks
To perform this test, you need a single-line telephone or an installer’s
test telephone (craft set). If you are installing rotary-dial trunks, use a
rotary telephone to perform this test.
To test loop-start trunks, follow the steps below:
!Plug the single-line telephone or the craft set into each central
office line/trunk jack (either at the network interface or at the
cross-connect field) and listen for dial tone.