Monitoring the DSU

6-3

7612-A2-GB20-10 November 1997
System LEDs
496-1506
2
CTS (106)
OK
ALARM
TEST
DM
OOS
OOF
NS
TXD (103)
RXD (104)
RTS (105)
DTR (108)
NetworkSystem Port
red green yellow
OK:
ON – DSU is operational.
OFF– DSU has detected a system failure, or there is
no power.
ALARM:
ON – DSU has detected an alarm condition locally or from
the network. Refer to Chapter 8,

Messages and

Troubleshooting

.
TEST:
ON – Test in progress. Test can be initiated locally, remotely,
or from the network. Includes power-up self-test.