Filter
Top Products
ISDN-PLK (ISDN-PRI Signaling Link Port)
Issue 1 June 2005 1423
ISDN-PLK (ISDN-PRI Signaling Link Port)
S8700 | 8710 / S8500 / S8300
This MO was formerly known as “ISDN-LNK (ISDN-PRI Signaling Link Port)”. For related
information, see UDS1-BD (UDS1 Interface Circuit Pack)
on page 2374.
Note:
Note: See the figures in the ISDN-SGR (ISDN-PRI Signaling Group) on page 1429
section of this chapter 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 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 or higher suffix 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 or higher suffix or TN767 DS1 Interface circuit packs. (The TN722
cannot be used for this application). The B channels are connected to the TDM Bus.
Note:
Note: S8300 / G700: Although the ISDN-PLK MO is provided for a G700 media gateway,
this MO only partially supports the G700’s MM710 DS1 media module.
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
In a 32-channel system, the DS1 ISDN Trunk or PRI endpoint port (B-channels) may use any of
the ports 1-15 or 17-31, but the ISDN-PRI Signaling Link Port must be the 16th port on the
TN464F/GP circuit pack. In certain configurations (NFAS), the 16th port may be used as a
B-channel. Refer to ISDN-SGR (ISDN-PRI Signaling Group)
on page 1429 for further details.
The TN767 DS1 interface is used for 24 channel 1.544 Mbps systems. The TN464F/GP can be
used for either 24 or 32 channel systems. The 32-channel (31 DS0 channels + 1 framing
channel 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.
MO Name in Alarm
Log
Alarm
Level
Initial Command to Run
1
1. For this MO, location is 24 for 24-channel interfaces and 16 for 32-channel interfaces.
Full Name of MO
ISDN-LNK MIN test port location l ISDN-PRI Signaling Link port
ISDN-LNK WRN test port location sh ISDN-PRI Signaling Link port