Nortel Networks NN43001-563 - Manual (Page 26)

26 Overview of IP Trunk 3.01
call is not resolved using the local Address Translation Protocol Module
(ATPM) and IP Trunk 3.01 (and later) is registered with a Gatekeeper, then
IP Trunk 3.01 (and later) routes the call to the Gatekeeper.
The IP Trunk 3.01 (and later) node is subordinate to the Gatekeeper for all
calls requiring the Gatekeeper. The IP Trunk 3.01 (and later) node registers
with the Gatekeeper according to H.323 protocol, requests admission,
accepts the reply according to H.323 protocol, and handles the call based
on the returned message from the Gatekeeper.
A CS 1000M node consists of two components:
• Call Server – used for call control of CS 1000M gateways
• Signaling Server – used for protocol analysis
The CS 1000M Gatekeeper accepts the registration of multiple IP trunk
cards implicitly in a single RRQ. This means that all Follower cards are
registered at the same time as the Leader card, because the CS 1000M
node returns an endpointIdentifier assigned by the Gatekeeper to that
node. Later, a request to establish a call to a Gatekeeper-controlled
endpoint receives in the response the enpointIdentifier of the endpoints
that was provided at registration.
The CS 1000M gateways interwork with the IP Trunk 3.01 (and later)
gateway resident function which generates the FACILITY redirect. The
FACILITY redirect is used when calls terminate at an IP Trunk 3.01 (and
later) node. The CS 1000M gateways do not use this redirection themselves.
Other Gatekeepers accept the FACILITY redirect and registration of multiple
IP trunk cards in a single RRQ; that is, the Followers are registered with,
and at the same time as, the Leader.
IP Trunk 3.01 (and later) interworks with the CS 1000M systems and IP
Peer Networking. As CS 1000M and IP Peer Networking use MCDN only,
the only applicable protocol is MCDN. IP Trunk 3.01 (and later) uses the
"interoperability format" of the non-standard data with IP Peer Networking
and all other gateways accessible through CS 1000M.
When IP Trunk 3.01 (and later) inter-operates with itself, with ITG Trunk
2.x.25, or with BCM 2.5 FP1, the IP Peer Networking CS 1000M Gatekeeper
is not required. The existing ITG Trunk 2.1 node-based dialing plan is
converted automatically to IP Trunk 3.01 (and later) by .
There are no direct media paths between the Meridian 1 telephones and the
CS 1000M telephones. There are direct paths between the IP Trunk 3.01
(and later) IP trunk cards and the CS 1000M telephones.
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2007, Nortel Networks
.