Demand test descriptions and error codes - Avaya Support

ISDN-PLK (ISDN-PRI Signaling Link Port)
MO Name in Log Alarm
Level
Initial Command to Run 1
ISDN-PLK (ISDN-PRI Signaling Link Port)
Full Name of MO
ISDN-PLK MIN test port location l ISDN-PRI Signaling Link port
WRN test port location
1. location refers to the port board location and port number. The port number is either 24 for 24-chel
interfaces or 16 for 32-chel interfaces.
This MO was formerly known as “ISDN-LNK (ISDN-PRI Signaling Link Port)”.
Note:
Note: See the figures in ISDN-SGR (ISDN-PRI Signaling Group) for an illustration of the
principles described below.
The ISDN-PRI interface uses out-of-band signaling (as opposed to robbed-bit, in-band
signaling) to transmit control messages between two endpoints. User information chels carry
digitized voice and digital data and are known as bearer chels (B-Chels). B-Chels are assigned
to DS1 ISDN trunks or PRI endpoints. Call-control signaling for the B-Chels is combined and
carried over the separate ISDN-PRI Signaling Link Port D-Chel.
The ISDN-PRI Signaling Link Port (ISDN-PLK) is a port on a TN464C or higher suffix UDS1
Interface circuit pack that has a direct interface to the packet bus that carries D-chel messages
to the processor. The associated B-Chels can use ports on the same circuit pack or ports on
other TN464C or higher suffix or TN767 DS1 Interface circuit packs. The TN722 cot be used for
this application. The B-Chels are connected to the TDM Bus.
Two types of DS1 interfaces exist:
● 24 DS0 chels on a 1.544-Mbps link
● 31 DS0 chels + 1 framing chel on a 2.048-Mbps link
The TN767 DS1 interface is used for 24 chel 1.544 Mbps systems. The TN464F/GP can be
used for either 24 or 32 chel systems. The 32-chel (31 DS0 chels + 1 framing chel on a 2.048
Mbps link) are only supported on TN464 series circuit packs. A description of these circuit packs
appears in DS1-BD or UDS1-BD maintenance documentation.
On 24-chel interfaces, the B-Chels may use any of the first 23 ports. The signaling link is
assigned to the 24th port.
On 32-chel interfaces, the DS1 ISDN Trunks (B-Chels) may use any of the ports 1 to 15 and
17-31. The signaling link is assigned to the 16th port. The 32nd chel (port 0) is used for framing.
In NFAS configurations, the 16th or 24th ports on some of the DS1 circuit packs may be used
for B-Chels. Refer to ISDN-SGR (ISDN-PRI Signaling Group) for further details.
Issue 5 May 2009 545