AT&T 3551 Switch User Manual


 
Status Indicators and Control Panel Messages
C-53550-A2-GB20-10 February 1995
Table C-3
(3 of 3)
Device Health and Status Messages
Message Condition
MUX Device Fail Internal failure in the TDM/Flex is detected.
MUX CommunicFail No reply from TDM/Flex. The DSU periodically polls the TDM/Flex for health and status.
When the DSU does not receive a response, the message MUX CommunicFail
appears in the Health and Status report.
Prt
nnn
Disable Transmitter at port
nnn
(01 or 02, or All is disabled. (Go to the Control branch to enable
the port.)
Port
nnn
DTR Alarm The DTR lead at port
nnn
(01 or 02, or All) has been Off for more than 30 seconds.
Prt
nnn
StreamTerm Streaming terminal. DTE at port
nnn
(01 or 02, or All) has its RTS lead turned ON
longer than the predefined time.
P
nnn
Tst:
test,init
The DSU is running a test on port
nnn
(01 or 02), initiated from
init
.
test
is one of the following tests:
BERT Bit Error Rate Test
DL Digital Loopback
DT Digital Test
DTE DTE Loopback
RL Remote Digital Loopback
TM Test Mode
init
is one of the following initiators:
DTE Data Terminal Equipment
FP Front Panel (the DCP)
NMS Network Management System
Remt Remote DSU
Redun Fan Alarm Indicates a problem with the fan on the –48 Vdc Central Office Power Unit.
Redun Pwr Alarm Indicates a problem with the power on the –48 Vdc Central Office Power Unit.
Subnetwrk Alarm A major alarm was set Off by one of the devices in your subnetwork. Check the
Subnetwork Health and Status report.
Sub-normal Speed The DSU is operating at a dial backup speed that is less than the DDS network speed.
Subtree Truncat Downstream health and status information has been truncated because it overflowed
system limits.
OutofFrameThresh For DSUs operating on a single port (rate adaption or nondisruptive), TDM, the local
DSU has detected a continuous MUX Out-of-Frame condition. The alarm clears when a
local DSU synchronizes with a remote DSU.
On a point-to-point circuit, if the alarm continues and the local DSU is configured for
automatic backup, the local DSU disruptively tests the DDS circuit. If the test fails, the
local DSU initiates a DDS Facility Alarm and initiates dial backup.
nn.n
DDS Indicates the speed (
nn.n
) of the active core (DSU or DBM) when there are no alarms.