DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1249PKT-INT (Packet Interface Circuit Pack)
9
The system is provided with 3 slots for a maximum of 3 Packet Interface
circuit packs. Only one Packet Interface circuit pack is required. This
circuit pack is typically plugged into the first slot but it may be plugged
into any of three slots. A WARNING alarm will be raised if more than one
Packet Interface circuit pack is present in an SPE carrier.
The version of firmware on a standby Packet Interface circuit pack must
also match the version of firmware on the corresponding active Packet
Interface circuit pack. If this is not the case, the standby Packet Interface
circuit pack enters a fatal fault state and the standby Packet Interface
circuit pack maintenance software sets its corresponding
in-service/out-of-service state to out-of-service.
The configuration checks are only made if the active SPE can
communicate with the standby SPE. If the standby SPE is locked off-line
by setting the SPE-SELECT switches on the DUPINT circuit packs to the
position of the active SPE, the mismatch test is not run and therefore, the
mismatch is not detected.
■ Packet Bus Connection
In a system equipped with duplicated SPEs, the Packet Interface circuit
packs in the Standby SPE can not access the Packet Bus to write data
except during the time of a planned SPE interchange and when the Peer
Link Test (#888) is run. Consequently, the Maintenance Looparound Test
(#886) that requires access to the Packet Bus is not run on Packet
Interface circuit packs on the Standby SPE.
■ SPE Interchange
Severe Packet Interface circuit pack faults which cause system and
application links to go down will be detected within 1 second. A fatal fault
error message will be generated and the Packet Interface maintenance
software will attempt to run the Packet Interface Reset test. In systems
equipped with the High Reliability or Critical Reliability Configuration this
will result in a request for an SPE interchange instead of a reset of the
Packet Interface circuit pack since stable calls are preserved across an
SPE interchange.
■ Clearing Alarms on Standby Packet Interface Circuit Packs
Alarms for Packet Interface circuit packs on the standby SPE are not
cleared automatically when handshake communication with the standby
SPE goes down. Handshake communication will go down when the
standby SPE is powered down (as part of the repair procedures) or when
the SPE-SELECT switches on the DUPINT circuit packs are set to the
position of the active SPE. Packet Interface alarms remain after an SPE
interchange. This means that memory shadowing will not turn on after an
SPE interchange if a Packet Interface circuit pack on the standby SPE had
a Major alarm before the interchange. If the Packet Interface circuit pack
is replaced, the alarm will still be present. A demand reset of the standby
PKT-INT is required to clear the alarm.
