Maintenance Objects
m. Error Type 3329
Tone-Clock circuit packs. (This error occurs only in Port Networks with
duplicated Tone-Clocks.) The fault may lie in the standby Tone-Clock or in
the circuit pack that controls selection of the active Tone-Clock (the t/c
selector). The goal of the following procedure is to ensure that both
Tone-Clocks can be interchanged into while either t/c-selector circuit pack
is active.
1. Examine the Error Log for errors reported against circuit packs in
2. Determine which circuit pack was controlling the choice of
3. If the t/c selector has not undergone an interchange since the error
4. Interchange the Tone-Clock circuit packs using the set tone-clock
5. Interchange the t/c selector using set expansion-interface if
1724
Issue 5 October 2002
The system attempted but failed to interchange
the same Port Network, paying special attention to TDM-CLK,
TONE-BD, DUPINT, SW-CTL, and EXP-INTF. Follow the
procedures indicated for any such errors found. After eliminating the
above potential problem sources, proceed with the following steps.
Tone-Clock at the time the error occurred.
For a PPN, the t/c selector is the DUPINT circuit pack on the
A-carrier.
For an EPN, the t/c selector is the active EXP-INTF circuit
pack that is connected to the PPN. This is EXP-INTF 2A01 or
2B02 for EPN1 and 3A01 or 3B02 for EPN2.
The t/c-selector circuit pack of interest is the one which was active at
the time the error was logged. An EXP-LNK interchange since the
time of the error may have made that circuit pack the current
standby. Determine whether an interchange affecting the t/c selector
has occurred since the TONE-BD error. When investigation an EPN
Tone-Clock, look for EXP-LNK entries in the hardware error log for
PNC interchanges, which would affect the EXP-INTF.
occurred, go to the next step. If such an interchange has taken
place, interchange back to the formerly active t/c selector. Use the
set expansion-interface command when investigating an EPN
Tone-Clock.) If the interchange attempt fails due to other errors,
resolve those problems first.
PC command. If the command succeeds, the interchange which
previously failed has been accomplished and the problem has been
satisfactorily resolved. If it fails, proceed to the next step. (You may
want to proceed in any case to definitively test all relevant
components.)
investigating an EPN. If errors prevent this interchange, resolve
them first.
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