MMI-SYNC
Issue 1 May 2002
8-1129
555-233-143
MMI-SYNC
NOTE:
Refer to
Chapter 4, ‘‘Alarms, Errors, and Troubleshooting’’
for MMCH
troubleshooting information.
Each Port Network (PN) must have a TN787D or later MMI circuit pack assigned
as the Multimedia Interface (MMI) master synchronization source for that PN. If
one or more MMI circuit pack is administered in a PN, one MMI circuit pack is
designated as the master synchronization source for every MMI circuit pack within
that PN.
The MMI circuit pack generates a synchronization signal and puts that signal on
the TDM bus. Other MMI packs or any other circuit pack within a PN can listen to
this signal and “synchronize up” to it. The first MMI circuit pack inserted in a PN is
normally designated as the master. As subsequent MMI packs are inserted, they
are instructed to listen and synchronize to the time-slot of the master MMI. In the
unlikely case of an MMI losing this reference, an uplink message is sent from the
MMI circuit pack that lost the signal to maintenance, which also clears the “event”
counter on this MMI with a downlink message. This forces the MMI circuit pack to
return the current state of the synchronization signal. If the signal is still lost, then
the recovery algorithm is entered. Note that during this time, the MMI circuit pack
synchronizes to its internal clock, and there should be no service disruption. A
loss of synchronization is usually the result of a circuit pack failure. The
maintenance strategy is to switch the master source away from the bad pack to
another healthy MMI circuit pack within the PN.
MO’s Name (in
Alarm Log)
Alarm
Level
Initial SAT Command to
Run
1
1.
Where UU is the universal cabinet number (1–64 for ATM PNC, 1–44 for CSS PNC); C is the carrier designation
(A, B, C, D, or E); SS is the address of the slot in the carrier where the circuit pack resides (01–21); and pp is
the 2-digit port number (01, 02, 03, ...).
Full Name of MO
MMI-SYNC
MINOR
test board UUCSS l r#
Multimedia Interface circuit pack
Содержание S8700 Series
Страница 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Страница 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Страница 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Страница 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Страница 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Страница 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...
Страница 1121: ...CARR POW Carrier Power Supply Issue 1 May 2002 8 399 555 233 143 Figure 8 19 Power Distribution Unit J58890CH 1 ...
Страница 1447: ...E DIG RES TN800 reserve slot Issue 1 May 2002 8 725 555 233 143 E DIG RES TN800 reserve slot See ASAI RES ...
Страница 1735: ...LGATE AJ Issue 1 May 2002 8 1013 555 233 143 LGATE AJ See BRI SET LGATE BD See BRI BD LGATE PT See BRI PT ...
Страница 1846: ...Maintenance Object Repair Procedures 555 233 143 8 1124 Issue 1 May 2002 Figure 8 62 TN787 MMI MULTIMEDIA INTERFACE CIRCUIT PACK ...