DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1791TONE-BD (Tone-Clock Circuit Pack)
9
NOTE:
Replacing the circ uit pack and retesting it with the test
tone-clock command is not adeq uate to retire this alarm and
return the Tone-Clock Circuit Pack to full service; the Clock
Health Inquiry test (#46) will conti nue to fail. Because the
ability to generate cloc ks was considered lo st, once any
repairs have been made it is necessary to execute the set
tone-clock PC override command, forcing t he circuit pack to
become active. If the p roblem has not actually b een
corrected, this ac tion may cause a disruptio n in service for
active digital fac ilities users.
3. If error 2305 or 3848 persists, all cloc k signals from the indicated
board were lost. If the reported Tone-Clock circuit pack is in a Port
Network with duplicated Tone-Clocks, the problem may lie with the
circuit pack responsible for selecting the active Tone-Clock circuit
pack (the
t/c selector
).
■For a PPN, the t/c selector is the DUPINT circuit pack on
carrier A.
■For an EPN , the t /c s elec tor is the a ctiv e EXP-INTF c irc uit
pack that is connec ted to the PPN. This is EXP-INTF 2A0 1 or
2B02 for EPN1 and 3A01 or 3B02 for EPN2.
The t/c selector circuit p ack of interest is the one which was ac tive
at the time the error was logged. This is the c urrently active t/c
selector unless there has been an SPE interchange for PPN
problem, or an EXP-INTF link switch for EPN problem, In order to
determine whether an interchang e has occurred sinc e the
TONE-BD error, examine the display initcauses log for SPE
interc han ges, and EXP- LNK en tries in the hard ware e rror l og fo r
expansion link interchanges.
If the t/c selector circ uit pack was not replac ed as part of the
previous step, replac e it now. Follow procedures desc ribed in
"Replac ing SPE Circ uit Pac ks" in Chap ter 5; Chapter 7, ‘‘LED
Interpretation’’, for the DUPINT circuit pack, or in the EXP-INTF
section of this chapter for t he Expansion Interface.
4. If the error has not been corrected at this point, there is a problem
with the TDM Bus within the Port Network containing the repor ted
Tone-Clock circuit pack. This may includ e TDM Bus intercarrier
cables, Bus terminators, b ent pins on the backp lane, and errors on
any circuit pack p lugged into the s ame Port Network. Refer to the
TDM-BUS section.
l. Error Type 2561This error indicates that a Tone-Clock circuit pack, with
a different circuit pac k code as required for this system, has been inserted
in the port slot as shown in the Hardware Error Log. To resolve this error,
refer to the "How to Replace the Tone-Clock Circuit Pack" section for an