EXP-PN (Expansion Port Network)
Issue 1 May 2002
8-821555-233-143
EXP-PN (Expansion Port Network)
The EXP-PN MO is responsible for overall maintenance of an Expansion Port
Network (EPN). The focus of EPN maintenance is on the EI or on the ATM’s EI
circuit pack that is acting as the Expansion Archangel in an EPN. EXP-INTF or
ATM-EI covers maintenance of the EI or ATM EI circuit pack, while EXP-PN
covers a much broader area of activities and problems on an EPN. The alarming
strategy for EXP-PN is fairly simple and does not make use of any failure analysis
routine for spawning maintenance actions. EXP-PN alarming is based on the
availability of an EPN for service and the EPN’s response to various recovery
actions.
When investigating alarms logged against an EPN, problems involving the EI, an
ATM EI circuit pack acting as the Expansion Archangel, and problems that may
involve loss of communication between the EPN and the media server should be
investigated. This could ultimately include fiber links (FIBER-LK), DS1 CONV
circuit packs (DS1 CONV-BD), SNI circuit packs (SNI-BD) and Switch Node
Configurations (SN-CONF) for CSS. For ATM, this could include the PN ATM EI
(ATM-EI) circuit pack, the ATM switch (ATM-NTWK), and EPN ATM EI (ATM-EI)
circuit pack.
PN Restarts
While not an exhaustive discussion of PN recovery actions, this section describes
at a high level the causes and effects of PN restarts so that these Error Log
events can be understood.
MO’s Name (in
Alarm Log)
Alarm
Level Initial SAT Command to Run
1
1. Investigate errors against EXP-PN and EXP-INTF.
Full Name of MO
EXP-PN MAJOR display errors
1
Expansion Port Network
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