EXP-INTF (Expansion Interface Circuit Pack)
Issue 1 May 2002
8-771555-233-143
Connectivity has been reestablished between the EI in the SREPN and its
counterpart EI circuit pack in the S8700 Multi-Connect PN. The system is now in
a normal S8700 Multi-Connect EI configuration.
LEDs
SREPN Expansion Interface
The EI circuit pack has red, green, and amber LEDs. The red and green LEDs
show the standard conditions:
■ Red indicates an alarm condition.
■ Green indicates maintenance testing in progress.
The amber LED is used to provide useful visual status information:
■ Active EI circuit packs:
— Have their amber LED on solid (for an inter-EPN EI in a direct
connect system)
— Blink a pattern of 2 seconds on and 200 ms off.
■ The standby PNC EI circuit packs should have their amber LEDs off.
Another way to determine which PNC (and therefore, which EIs in an EPN) is
active and which is standby, use the status port-network and status PNC
commands.
See Table 8-299 for the possible EI amber LED states.
Notes:
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 EI or SNI detected
on opposite end of fiber). This condition may be caused by the absence of
the neighbor EI or SNI circuit pack, a broken or missing fiber, or a missing
lightwave transceiver on either endpoint (EI or SNI circuit packs).
Table 8-299. Expansion Interface Circuit Pack Amber LED Flashing States
Condition LED On LED Off
Fiber Out-of-Frame (a) 0.1 second 0.1 second
In Frame-No Neighbor (b) 0.5 second 0.5 second
Expansion Interface Active (c) 2 second 0.2 second
Expansion Interface Active (d) solid on never off
Expansion Interface Standby (e) never on solid off
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