DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN
555-233-121
Issue 2
November 2000
SREPN Maintenance
2-14
Maintenance procedure
2
See
Table 2-6
for the possible EI yellow LED states.
Table 2-6.
Expansion Interface circuit pack YELLOW LED flashing states
Condition
LED On
LED Off
Fiber Out-of-Frame
a
a.
This flashing state corresponds to Error Codes 769 and 770 from the Hardware Error
Log and indicates a failure of Test #238. These error codes are usually accompanied
by Error Code 1281 (no Expansion Interface or Switch Node Interface detected on
opposite end of fiber). This condition may be caused by the absence of the neighbor
Expansion Interface or Switch Node Interface circuit pack, a broken or missing fiber, or
a missing lightwave transceiver on either endpoint (Expansion Interface or Switch Node
Interface circuit packs).
When the SRP is in Survive mode, this flash rate at the Release 9r EI/SNI circuit pack
is normal, because the TN2301 puts the fiber into looparound back to the Release 9r.
0.1 second
0.1 second
In Frame-No Neighbor
b
b.
This corresponds to Error Code 1281 from the Hardware Error Log and indicates a
failure of Test #237. This condition is usually due to the failure of this Expansion
Interface circuit pack or a failed Expansion Interface or Switch Node Interface circuit
pack counterpart.
When the SRP is in Normal mode, the Expansion Interface circuit pack’s yellow LED
flashes at this rate. THIS IS NORMAL. The links to its counterpart in the R9r ARE down
and are not re-established until the SRP goes into Survive mode.
0.5 second
0.5 second
Expansion Interface
Active
c
c.
This is the normal state for an Active EPN Expansion Interface circuit pack that is also
the bus master (Expansion Archangel) in the EPN.
2 seconds
0.2 second
Expansion Interface
Active
d
d.
This is the normal state for an Active Expansion Interface circuit pack that is not the bus
master (Expansion Archangel) for an EPN. This applies only in direct-connect
configurations where the Expansion Interface circuit pack in an EPN is connected
through a fiber link to an Expansion Interface circuit pack in the other EPN. This state
also applies for an active Expansion Interface circuit pack located in the PPN.
Solid on
Never off
Expansion Interface
Standby
e
e.
This is the normal state for a standby Expansion Interface circuit pack in the PPN and
EPN.
Never on
Solid off
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