Avaya S8700 - ISDN-PLK (ISDN-PRI Signaling Link Port)

ISDN-PLK (ISDN-PRI Signaling Link Port)
Issue 1 May 2002
8-965555-233-143
ISDN-PLK (ISDN-PRI Signaling Link
Port)
NOTE:
This MO was formerly known as "ISDN-LNK (ISDN-PRI Signaling Link
Port)".
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 channels carry digitized voice and digital data and are known as
bearer channels (B channels). B channels are assigned to DS1 ISDN trunks or
PRI endpoints. 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 (ISDN-LNK) is a port on a TN464C/D UDS1
Interface circuit pack that has a direct interface to the packet bus that carries
D-channel messages to the processor. The associated B channels can use ports
on the same circuit pack or ports on other TN464C/Ds or TN767 DS1 Interface
circuit packs. (The TN722 cannot be used for this application). The B channels
are connected to the TDM Bus.
Two types of DS1 interfaces exist:
■ 24 DS0 channels on a 1.544-Mbps link
■ 31 DS0 channels + 1 framing channel on a 2.048-Mbps link
On 24-channel interfaces, the B channels may use any of the first 23 ports. The
signaling link is assigned to the 24
th
port. On 32-channel interfaces, the DS1
ISDN Trunks (B channels) may use any of ports 1 to 15 and 17 through 31. The
signaling link is assigned to the 16
th
port. The 32
nd
channel (port 0) is used for
framing. In NFAS configurations, the 24
th
or 16
th
ports on some of the DS1 circuit
packs may be used for B channels. Refer to ISDN-SGR for further information.
MO’s Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1. pp is 24 for 24-channel interfaces and 16 for 32-channel interfaces>
Full Name of MO
ISDN-LNK
2
2. For additional related information, see ‘‘UDS1-BD (UDS1 Interface Circuit Pack)’’.
MINOR test port UUCSSpp l ISDN-PRI Signaling Link port
ISDN-LNK WARNING test port UUCSSpp sh ISDN-PRI Signaling Link port