7.9
SyncDataChannelTesting
The Sync Data Channel Loopback test is used when the MultiMux has configured Port B for the sync data mode. This test simulates a modem or DSU in sync loopback mode. To use this test, configure the synchronous device for loopback test in which port B loops the data back to the synchronous device.
Table 7-7. Sync Data Channel Testing Procedure
Step Procedure
1Before the Sync Data Channel Loopback test is run, port B of the MultiMux has to be set for the sync data mode using the $MUXBSYNC command.
2Place the local MultiMux unit in Test Mode 13 (i.e., executing the Sync Data Channel Loopback test) by entering the following command.
AT&T13 (hit Return)
The supervisory console will display the following message:
AT THIS POINT IN TIME, ANY SYNC DATA
RX'D BY THE MUX IS LOOPED BACK OUT
AND TX'D BY THE MUX.
4When you have verified that the Sync Data Channel is operating correctly, enter the following to end the test:
ATZ (hit Return)
or
AT&T0 (hit Return)
