Non-Switched Configuration Verification (Nt4X25Ad /Ch /Av /Df) - Northern Telecom DMS-100 Series Installation And Maintenance Manual

0 297-2121-226
0 VINTAGE 05.01
0 4. Type a string of characters on the
0 typed characters are echoed back to the terminal, the end-to-
0 end channel is good.
0 5. Disconnect the call.
0 6. Unplug the
0 the OFF position (Normal position).
0 7. Plug the DU into the backplane.
0 formed on the DU. The Under Test LED turns off.
0 Far-end Loopback Test - Method Two:
0 1. At a known good desktop DU, enable the Far-end
0 The Under Test LED lights.
0 2. Place a call to the rackmount DU to be tested.
0 3. From the
0 the rackmount DU.
0 back to
0 operating properly and the end-to-end data channel is good.
0 4. Disconnect the call.
0

Non-Switched Configuration Verification (NT4X25AD /CH /AV /DF)

0 In a non-switched configuration two DUs are connected directly to
0 each other without going through the DMS-100 Family switch.
0 To verify the operation of a DU in a non-switched
0 ensure that
0 standard DTE activity such as logging-on or transmitting data.
0 5-12
DU from the backplane and return switch SW2-3 to
known good DU, transmit a string of characters to
If the transmitted characters
the DTE of the known good DU, the rackmount DU is
both DTEs and DUs are turned on, then perform any
DTE keyboard.
A power-up self-test is per-
Loop
configuration,
If the
option.
are echoed