ISDN-SGR (ISDN-PRI Signaling Group)
Issue 1 May 2002
8-977
555-233-143
In a FAS signaling group, the 24
th
port of the TN464C/D UDS1 Interface circuit
pack carries D-channel signaling for up to 23 B-channel ports on the same circuit
pack.
In an NFAS signaling group, the 24
th
port of one TN464C/D UDS1 Interface can
carry D-channel signaling for B channels on several other DS1 circuit packs as
well, including TN767s and TN464Bs. The 24
th
port on the other circuit packs can
be used as a B channel. A D channel in an NFAS group can signal for B channels
on a total of 20 DS1 circuit packs.
D-channel backup provides increased reliability, which is highly desirable since
NFAS permits a D channel to signal for many more B channels. NFAS allows the
administration of a backup D channel that remains in a standby state until the
active D channel goes down. If so, the backup D Channel takes over and
provides signaling for every B channel in the signaling group.
The operation of the entire ISDN-PRI signaling group depends on several other
entities: the ISDN-PRI signaling channel ports, the TN464C/D UDS1 Interface
circuit pack on which the D channels reside and the system link that is carried
over the packet bus to the processor. When there are problems with the
ISDN-PRI signaling group, also investigate
‘‘ISDN-LNK (ISDN-PRI Signaling Link
,
‘‘UDS1-BD (UDS1 Interface Circuit Pack)’’
,
and
Error Log Entries and Test to Clear Values
Table 8-386.
ISDN-PRI Signaling Group Error Log Entries
Error
Type
Aux
Data
Associated Test
Alarm
Level
On/Off
Board
Test to Clear Value
0
1
0
Any
Any
test sig-group grp#
1 (a)
Any
None
257 (b)
Any
None
test sig-group grp#
513 (c)
Any
None
test sig-group grp#
769
Any
Primary Signaling Link
Hardware check (#636)
test sig-group grp#
1025
Any
Secondary Signaling Link
Hardware check (#639)
test sig-group grp#
1793 (d)
Any
Layer 2 Status test (#647)
WARNING
OFF
test sig-group grp#
2049 (e)
Any
Layer 2 Status test (#647)
WARNING
OFF
test sig-group grp#
2305 (f)
Any
Remote Layer 3 Query test
(#637)
MINOR
OFF
test sig-group grp#
Continued on next page
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 ...