Avaya S8700 Maintenance Manual page 239

Circuit Pack LEDs
Expansion Interface Circuit Pack LEDs
The Expansion Interface (EI) TN570 circuit pack has the standard red, green and
yellow LEDs. The red and green LEDs have the traditional meaning, where red
indicates an alarm condition, and green indicates testing in progress.
The yellow LED displays various flashing patterns to provide status information
useful in isolating faults in the fiber link and other components connected to the
fiber link. Table 6-1
Table 6-1. Expansion Interface Yellow Led Flashing Codes
LED on
0.1 sec
0.5 sec
2 sec
solid on
Maintenance Circuit Pack LEDs
TN775 PN maintenance circuit packs have seven LEDs on their front panels. The
top three LEDs are the standard group of red, green and yellow, and indicate the
status of the circuit pack. The green LED on TN775s blinks faintly once per
second, indicating continual self-testing.
The second group of three LEDs, labeled "ALARMS", reflects maintenance
conditions throughout the system and indicates alarms reported against other
components, as shown in
555-233-143
illustrates the EI yellow LED states.
LED off Condition
0.1 sec Fiber Out-of-Frame. This state indicates a failure of test #989.
This may be caused by absence of the opposite end EI or
Switch Node Interface (SNI), a broken or missing fiber, or a
missing lightwave transceiver on either endpoint.
0.5 sec In Frame — No Neighbor. This state corresponds to a failure
of test # 237, usually due to a failure of this EI or of the EI or
SNI at the other end of the fiber.
0.2 sec EI Active. This is the normal state of an active EI that is an
archangel of an EPN.
EI Active. This is the normal state for an active EI that is not an
EPN archangel. These include EPN EIs connected to other
EPN EIs in direct connect configurations, and EIs located in the
processor port network.
solid off EI Standby. This is the normal state for a standby EI in
systems with a duplication option.
Table 6-2.
Issue 1 May 2002 6-7