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COMSPHERE DualFlow Data Service Units
C-2 December 1996 3615-A2-GB20-20
Table C-1
DSU Status Indicators
Label Color Description
OK Green Health and status indicator: DSU operation is normal. (The DSU has not
detected any of the faults listed under Alrm, below.)
This indicator flashes two times per second if a message from the NMS is
present.
Alrm Red Health and status indicator:
There is a fault in the local or remote DSU, DBM, or DDS facility, or there is a
corrupted configuration.
The following alarms at the local or remote DSU cause the Alrm status
indicator on the affected DSU to light:
Configuration Corrupt
Device Fault
Dial Tone Test Failure
DTR Alarm
Facility Alarm
MUX Failure
No Response
Redundant Power Alarm
Streaming Terminal
Subnetwork Alarm
Out-of-Frame Threshold
Out-of-Service
Test Yellow Active device (DSU or DBM) is either performing a test or other DSUs or DBMs
are in Test mode.
1
Dial Yellow DBM is active
Rapid flashing: Call setup in progress
Slow flashing: Call established but in Standby mode
Steady ON: Backup call established and active
TXD, RXD, RTS,
CTS, DSR, DTR,
LSD
Green Internal lead states at the DSU/DTE interface
(circuit designations)
:
Control circuit active
or
Data circuit SPACE(ing).
Front Panel
(Model 3616 only)
Yellow DSU is currently selected at the SDCP.
(The SDCP addresses one DSU at a
time
.
)
1
The DSU or DBM is automatically put into Test mode when a remote DSU or DBM is performing a disruptive test (e.g., a
Local Loopback (LL) at the control DSU. A DSU or DBM in Test mode has its DTE interface turned Off).