DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
LED Interpretation
7-5SYSAM and Maintenance Circuit Pack LEDs
7
The yellow LED displays various flashing patterns to provide status information
useful in isolating faults in the fiber link a nd other components c onnected to the
fiber link. Table 7-1 illustrates the EI yellow LED states.
SYSAM and Maintenance Circuit Pack LEDs
TN1648 System Access-Maintenance (SYSAM) and TN775 EPN Maintenance
circuit packs ha ve seven LEDs on their front panels. The top three LEDs are the
standard group of red , green and yellow, and ind icate the status of the circ uit
pack. The green LED on TN775s blinks faintly once per second, ind icating
continual self-testing.
The second group of three LEDs, labeled “ALARMS”, reflect maintenance
conditions throughout the syst em, and indicate alarms reported against other
components, as shown in Table 7-2.
NOTE:
On systems with duplic ated SPEs, disregard the Major, Minor, and Warning
alarm LEDs o n the s tand by SYSA M cir cuit pac k. On ly tho se on t he ac tive
SYSAM (se e yell ow LED , third from the t op) a re up date d wi th the curr ent
system status.
Table 7-1. Expansion Interface Yellow Led Flashing Codes
LED on LED off Condition
0.1 sec 0.1 sec Fiber Out-of-Frame. This state indicates a failure of test
#989. This may be caused by absence of the opp osite
end EI or Switch Node Interface, a b roken or missing
fiber, or a missing lig htwave transceiver on either
endpoint.
0.5 sec 0.5 sec In Frame — No Neighbor. This state corresp onds 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.
2 sec 0.2 sec Expansion Interface Active. This is the normal state o f
an active EI that is an archangel of an Exp ansion Port
Network.
solid on Expansion Interface Active. This is the normal sta te 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 Expansion Interfac e Standby. This is the normal state for
a standby EI in systems with a dup lication option.