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 and other components connected 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 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”, reflect maintenance
conditions throughout the system, and indicate alarms reported against other
components, as shown in Table 7-2
.
NOTE:
On systems with duplicated SPEs, disregard the Major, Minor, and Warning
alarm LEDs on the standby SYSAM circuit pack. Only those on the active
SYSAM (see yellow LED, third from the top) are updated with the current
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 opposite
end EI or Switch Node Interface, a broken or missing
fiber, or a missing lightwave transceiver on either
endpoint.
0.5 sec 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.
2 sec 0.2 sec Expansion Interface Active. This is the normal state of
an active EI that is an archangel of an Expansion Port
Network.
solid on Expansion Interface 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 Expansion Interface Standby. This is the normal state for
a standby EI in systems with a duplication option.
