Lucent Technologies Release 7 Processor Port Network:, Expansion Port Networks:

DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4 June 1999
Alarms, Errors, and Troubleshooting
5-109Packet Bus Fault Isolation and Repair
5
Processor Port Network:
1. Power down the cabinet and ter minate the packet bus so th at it extends
only from the carrier that contains the active SPE (A or B) to the carrier that
contains the Maintenance/Test circuit pac k.
2. Power up the cabinet, allow the system to reb oot, and determine if the
packet bus fault is still p resent. If not, proceed to the next step.
If there are shorts on the packet b us, perform Procedures 2 and/o r 3 for
the c ircu it pa cks i n the a ctiv e SPE and car riers conn ecte d to i t on th e
shortened bus. (Procedure 2 is performed for port circuit packs, and
Procedure 3 is performed f or SPE circuit packs.)
3. If the packet bus fault is not present, extend the pac ket bus to another
carrier, and repeat the p rocedure in the previous step . When the addition
of a carrier causes the fault to recu r, and if there are shorts, perform
Procedure 2 and/or Procedure 3 for only the c ircuit packs in that c arrier.
4. If the packet bus fault rec urs when the packet bus is extend ed, and if
there are no shorts, or Procedures 2 and 3 do not resolve the problem, the
added car rier(s) that caused the prob lem to recur are defective and must
be replaced.
Expansion Port Networks:
1. Place the Maintenance/Test circuit pack into a carrier that contains the
active Expansion Interface c ircuit pack to p ermit isolation of the failure to
the smallest possible numb er of carriers.
2. Power down the cabinet and ter minate the packet bus on the carrier with
the M/T and active EI.
3. Determine if the packet bus fault is still present If so, and if there are shorts
on the packet bus, p erform Procedure 2 and/or Proced ure 3 for only the
circuit packs i n carriers connected to the ‘‘shortened’’ packet b us.
4. If the packet bus fault is not present, extend the pac ket bus to another
carrier, and repeat the p rocedure in the previous step . When a carrier that
causes the fault to recur is add ed, and if there are shorts, p erform
Procedure 2 and/or Procedure 3 for only the c ircuit packs in that c arrier.
5. If the packet bus fault rec urs as the packet bus is extend ed, and if there
are no shorts, or Procedures 2 and 3) do not resolve the problem, the
added car rier(s) that caused the prob lem to recur are defective and must
be replaced.