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Maintenance-Object Repair Procedures
555-233-143
8-992
Issue 1 May 2002
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Maintenance/Far-End (MTC/FE)
This state is reached when the far end does not respond to messages sent
over the signaling link for a particular trunk after a certain amount of time.
This state is different from OOS/FE since the signaling link must have
initially been up and the B channels in service. The switch will periodically
send messages to the far end to try to negotiate the trunk (B channel) into
service. The trunk is unusable for outgoing calls but will service incoming
call requests from the far end. Note that transitions into MTC/FE do not
drop stable calls. Therefore, if the service state changes from in service to
MTC/FE, then stable calls are unaffected.
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Maintenance/Near-End (MTC/NE)
The trunk (B channel) is in this state if the signaling channel (ISDN-LNK) is
busied out by system technician. The trunk (B channel) is also temporarily
in this state if the system technician has issued a test trunk
trunk-group/trunk-member long command. This command will execute
the ISDN-PRI test call. This test will change the state of the trunk member
to MTC/NE for the duration of the test unless a call request comes in from
the far end. In that case, the test would abort. Note that transitions into
MTC/NE do not drop stable calls. In this state, the B channel is not usable
for new incoming or outgoing calls.
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Pending States
In addition to one of the previous components, the service state may have
a pending component, indicating that the switch is waiting for a reply from
the far end. These service states remain in effect until either a response is
received or the allotted waiting time expires.
— Pending-in-Service
The near end is awaiting a far-end response to a B-channel
maintenance message requesting that a B channel be transitioned
to in service.
— Pending-Maintenance
This state is supported only by systems using country protocol 1
(including US). The near end is awaiting a far-end response to a
maintenance message requesting that a B channel be transitioned
to the maintenance service state.
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Call Activity States
The in-service state also has a call activity component.
— Active
A call is connected over the B channel (for example, in
serviceactive).
— Idle
There is no call currently on the B channel (for example, in
serviceidle).
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 ...