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MX2800 M13 Multiplexer User Manual Installation and Operation, Section 2
61200290L1-1G 2-17
T1/E1 Status LEDs
These LEDs apply to each individual T1 or E1. Various conditions are indicated by the state of the LED
(its color and whether it blinks, alternates color, or is on solid). The condition descriptions vary depending
on whether the LEDs represent T1s or E1s of the active controller card or the controller card on standby.
Table 2-5 provides LED definitions for the active and standby cards.
Table 2-4. LED Conditions for Standby Cards
LED LED State Card Condition
ACT Green blinking Normal (all OK)
Amber solid Software update in progress
Red blinking Self test failed
NET Off Normal (all OK)
Red blinking DS3 failure
ALM Off Normal (no alarm)
PRF Off Normal (all OK)
Table 2-5. T1/E1 LED Conditions
LED LED State T1/E1 Condition
Active
Card
Green solid Normal (all OK)
Off Disabled
Red blinking LOS
Red flash (once per event) Single/burst CV
Red solid XCV threshold exceeded or AIS (refer to XCV Threshold on
page 3-15)
Amber solid In test (Local)
Green/amber alternating In test (Remote)
Red/amber alternating In test with alarms
Standby
Card
Off Normal (all OK)
or
N/A (in the case of E1 configuration)
Red blinking T1/E1 failure