MT56DSU2 Owner’s Manual
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4.3.1 Local Loopback Test
This test allows you to test the local DTE and the local MultiDSU56K. Use the following steps to
perform the Local Loopback Test.
1. Set DIP switch #9 to the down position.
2. The front panel Test (TM) LED lights, and if you send data from your DTE, it should be “looped
back” to your DTE. If you have access to a Bit Error Rate Tester, this can be used in place of
the DTE.
DTE
(Or BERT Tester)
MultiDSU56K
(In Local Loopback Test Mode)
4.3.2 Digital Loopback Test
This test allows you to test the local DTE, the local MultiDSU56K, the communications link, and
the remote MultiDSU56K. Use the following steps to perform the Digital Loopback Test.
1. Set DIP switch #9 on the remote MultiDSU56K to the down position.
2. The front panel Test (TM) LED lights, and if you send data from the local DTE, it should be
looped back to the local DTE. If you have access to a Bit Error Rate Tester, this can be used in
place of the local DTE.
Local
MultiDSU56K
Network
Local DTE
(or BERT Tester)
Remote MultiDSU56K
(In Digital Loopback Test Mode)
