DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN
555-233-121
Issue 2
November 2000
SREPN Maintenance
2-13
Maintenance procedure
2
Circuit pack LEDs
SRSwitch (TN2301) LED interpretation
Table 2-5
lists the conditions indicated by the LEDs on the TN2301 circuit pack.
Expansion Interface (TN570C) LED interpretation
The Expansion Interface circuit pack has red, green, and yellow LEDs. The red
and green LEDs show the standard conditions:
■
Red indicates an alarm condition
■
Green indicates maintenance testing in progress
The yellow LED is used to provide useful visual status information:
■
Active EI circuit packs:
— Have their yellow LED on solid (for an inter-EPN EI in a direct-
connect system)
— Blink a pattern of 2 seconds on and 200 ms off.
■
The standby PNC EI circuit packs should have their yellow LEDs off.
NOTE:
Another way to determine which PNC (and therefore, which EI in a port
network) is active and which is standby, use the status port-network and
status PNC commands.
Table 2-5. TN2301 LED interpretation
LED (color)
Condition
Interpretation
BKUP - Backup power
(red)
On steady
Backup power (-48v) from the SREPN to the TN2301
has failed.
DATA (yellow)
On steady
Data passing through the TN2301 to/from the A-carrier
EI board in the EPN.
Off
If off and no service-affecting conditions are present,
Critical Reliability B-carrier links to the Release 9r are up.
AUTO (green)
On steady
Indicates that the TN2301 faceplate switch is in the
AUTO position. This is normal when in-service.
SURVIVE MODE ON
(red)
On steady
Survive mode activated either by the Maintenance circuit
pack control or the faceplate switch is in the TEST
position.
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