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ISDN-PLK (ISDN-PRI Signaling Link Port)
Issue 4 May 2002 10-941 555-233-123
ISDN-PLK (ISDN-PRI Signaling Link
Port)
NOTE:
Use this Maintenance Object (ISDN-PLK) for maintenance tests, alarms,
and hardware errors when the “ISDN-PRI over PACCON” option on the
system-parameters customer form is set to a “y” When the ISDN PRI over
PACCON is set to “n” use Maintenance Object ISDN-LNK.
The ISDN-PRI over PACCON option allows the PRI Links to be carried over the
PACCON (Packet Controller TN778 circuit board), increasing the system
ISDN-PRI capacity to the possible number of D-channels. An ISDN-PRI Signaling
Link is known as a D-channel. The D-channel is used to transmit call-control
signaling for the B-channels. B-channels (User information channels) are known
as bearer channels (B-channels for example, transmit digitized voice, digital data);
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 call control
signaling for the B-channels is combined and carried over the separate ISDN-PRI
Signaling Link Port D-channel.
The ISDN-PRI Signaling Link Port is the port on a TN464C or later UDS1 Interface
circuit pack that carries D-channel messages to the processor. The ISDN-PRI
interface uses out-of-band signaling as opposed to robbed-bit, in-band signaling.
For G3s, and G3i, this port can be used as an interface to the TDM bus or to the
Packet bus. This is controlled by the “ISDN-PRI over PACCON” option. When the
option is set to “y” the ISDN-PRI D-channel messages are transmitted over the
Packet bus to the Packet Control circuit pack. The associated maintenance object
name of the UDS1 port used to carry the D-channel over the Packet Bus is
ISDN-PLK.
The B-channels associated with a ISDN-PRI D-channel can use ports on the
same circuit pack or ports on other TN464C or later or TN767 DS1 Interface
circuit packs (the TN722 cannot be used for this application).
MO Name (in
Alarm Log)
Alarm
Level
Initial Command to
Run
1
1 Where ’pp’ is ’24’ for 24-channel interfaces, and ’16’ for 32-channel interfaces.
Full Name of MO
ISDN-PLK
2
2 For additional repair information, see also PKT-CTRL (Packet Control), DS1-BD (DS1
Interface Circuit Pack) or UDS1-BD (Universal DS1 Interface Circuit Pack).
MINOR test port PCSSpp l ISDN-PRI Signaling Link Port
ISDN-PLK WARNING test port PCSSpp sh ISDN-PRI Signaling Link Port