User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1495TONE-BD (Tone-Clock Circuit Pack)
10
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.
3.If the t/c selector has not undergone an interchange since the error
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.
4.Interchange the Tone-Clock circuit packs using the set tone-clock 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.)
5.Interchange the t/c selector using set expansion-interface if
investigating an EPN. If errors prevent this interchange, resolve
them first.
6.Attempt again to interchange Tone-Clocks with the set tone-clock PC
command.
— If the Tone-Clock interchange failed for both t/c selectors:
Replace the standby Tone-Clock circuit pack which could
not be interchanged into and return to this step. (See ‘‘
How
to Replace a Tone-Clock Circuit Pack’’.) Test the new circuit
pack as follows:
a. Execute the set tone-clock PC command.
b. Execute a set expansion-interface, if this is an EPN
Tone-Clock.
c. Execute the set tone-clock PC command again.
If these commands successfully complete, the problem has
been resolved.
— If these commands successfully complete, the problem has
been resolved.
— If the Tone-Clock circuit packs successfully interchange
when one EXP-INTF is active, but not when the other one is:
The t/c-selector circuit pack on the failing side is suspect.
a. Replace the A carrier DUPINT or EXP-INTF board that is
active when the Tone-Clock interchange fails. (Follow
procedures in ‘‘
Replacing Defective SPE Circuit Packs’’ in
Chapter 6, ‘‘
Reliability Systems: A Maintenance Aid’’ for the
DUPINT circuit pack; for the Expansion Interface, see
EXP-INTF.)