EXP-INTF (Expansion Interface Circuit Pack)
Issue 1 May 2002
8-773555-233-143
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 will usually be accompanied by error code 1281 (no Expansion
Interface 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 pack).
b. This flashing state 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 EI circuit pack or a failed EI or SNI circuit pack
neighbor.
c. This is the normal state for an active PN EI circuit pack that is also the bus
master (Expansion Archangel) in the PN.
d. This is the normal state for an active EI circuit pack that is not the bus
master (Expansion Archangel) for an PN. This applies only in the Direct
Connect configuration where the EI circuit pack in an PN is connected via a
fiber link to an EI circuit pack in the other PN.
e. This is the normal state for a standby EI circuit pack in a PN.
NOTE:
In an PN, its TN775C Maintenance (MAINT) circuit pack monitors the sanity
of the EI circuit pack. If the EI circuit pack should cycle between sane and
insane several times, the Maintenance circuit pack will hold the EI circuit
pack reset. If a new EI circuit pack is installed in the PN, and the red LED
remains lit, the PN’s Maintenance circuit pack should be removed because it
may be holding the new EI circuit pack reset. This condition could present
itself if there is a link problem to the PN, and the PN experiences several PN
restarts. The Maintenance circuit pack may be reinstalled after the EI circuit
pack has been physically inserted and the EI circuit pack’s red LED has
gone off.
Table 8-300. 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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