Lucent Technologies 555-233-119 Packet Interface Replacement, Demand Reset of a Packet Interface , Maintenance Object Interactions

DEFINITY ECS Release 8.2 Maintenance for R8.2csi 555-233-119 Issue 1
April 2000
Maintenance Objects
3-897PKT-INT (Packet Interface)
3
Packet Interface Replacement
To replace a Packet Interface, follow the proced ure to replace the TN798
Processor circuit pac k:
■Power down the system.
■Replace the TN798 Processor circuit pac k.
■Power the system back up.
Demand Reset of a Packet Interface
System software denies a demand reset of a Packet Inter face (reset
packet-interface) if the Packet Interface is in servic e. A reset would disrupt
service, existing calls, and links to adjuncts such a s AUDIX. The software that
controls Packet Interface maintenanc e puts a Packet Interface in the
out-of-service state if that Packet Interfac e has been reset four times within the
last 15 minutes, as part of the automatic recovery action that is initiated when a
hardware fatal fault condition is d etected.
Service States
Packet Interface maintenance software mo nitors the in-service/out-of-service
state of each Packet Interface instanc e. If maintenance software detect s that a
Packet Interface instance has a “ fatal fault,” it automatically attempt s to reset that
instance as quickly as p ossible. An extensive set of diag nostic tests are run
when a Packet Interface is reset.
If the Packet Interface diag nostic tests do not pass, t he failing Packet Interface
instance is placed in an out-of-service state. All links handled by that instance go
out of service, except for tho se than can be transferred or “ migrated” to the other
Packet Interface instance.
A Packet Interface also is put in the “ out-of-service” state if it has rep orted a fatal
fault at system initialization time or if the Packet Interfac e has been reset by
background mainte nance four times within the last 15 minutes, whether or not the
Reset test passes. The state of both Packet Interfaces c an be determined b y
using the status packet-interface command.
Maintenance Object Interactions
■Packet Bus Maintenance
Packet Interface 2 physic ally interacts with the PKT-BUS (Packet Bus)
through the TDM Bus and the C-LAN circui t pack’s Bus Bridge c ircuitry.
For certain types of Packet Interfac e errors, it may be difficult to isola te the
fault to one of these four interconnected components. In these cases,
Packet Interface maintenance will for ward the error report to the Packet
Bus maintenance, thus causing Packet Bus maintenance to record a
Packet Bus fault in the hardware error log and to run appropriate Packet
Bus tests.