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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-772ISDN-LNK (ISDN-PRI Signaling Link Port)
10
ISDN-LNK (ISDN-PRI Signaling Link
Port)
NOTE:
Use this Maintenance Object (ISDN-LNK) for maintenance tests, alarms,
and hardware errors when the “ISDN-PRI over PACCON” option on the
system-parameters customer
form is set to a “n”. When the ISDN PRI over
PACCON is set to “y” use Maintenance Object ISDN-PLK.
When the ISDN-PRI over PACCON option is set to “n”, the ISDN-PRI D-channel
call control messages are transmitted over the TDM bus to the Processor
Interface circuit pack and you must use this Maintenance Object for PRI Link
problems.
An ISDN-PRI Signaling Link is known as a D-channel. D-channels are used to
transmit call control signaling for B-channels. The call control signaling for the
B-channels is combined and carried over separate ISDN-PRI D-channels. User
information (for example, digitized voice, digital data) channels are known as
bearer channels (B-channels); DS1 ISDN Trunks are B-channels and they carry
the user traffic. PRI endpoint ports are also B-channels that can carry Wideband
traffic.
The ISDN-PRI Signaling Link Port (ISDN-LNK) and the associated DS1/UDS1
ISDN Trunk (ISDN-TRK) or PRI endpoint port (PE-BCHL) use ports on a TN767 or
TN464B or later DS1/UDS1 interface circuit pack (the TN722 cannot be used for
this application). The TN767 is used for 24 channel 1.544 Mbps systems. The
TN464B is used for 32 channel 2.048 Mbps systems. The TN464C or later can be
used for either 24 or 32 channel systems. A description of these circuit packs
appears in “DS1-BD” or “UDS1-BD”.
In a 24 channel system, the DS1 ISDN Trunk or PRI endpoint port (B-channels)
may use any of the first 23 ports. The ISDN-PRI Signaling Link Port must be the
24th port. In certain configurations (NFAS), the 24th port may be used as a
B-channel. Refer to “ISDN-PRI Signaling Group” for further details.
1. Where ’pp’ is ’24’ for 24-channel interfaces, and ’16’ for 32-channel interfaces.
2. For additional repair information, see also DS1-BD (DS1 Interface Circuit Pack) or UDS1-BD
(Universal DS1 Interface Circuit Pack) Maintenance documentation.
MO Name (in
Alarm Log)
Alarm
Level
Initial Command to
Run
1
Full Name of MO
ISDN-LNK
2
MINOR test port PCSSpp l ISDN-PRI Signaling Link Port
ISDN-LNK WARNING test port PCSSpp sh ISDN-PRI Signaling Link Port