Nortel Networks NN43001-314 - Manual (Page 35)

MG 1000B platform hardware description 35
For more information on the Signaling Server, refer to Signaling Server
Installation and Commissioning (NN43001-312). For more information on
SIP, H.323, and overlap signaling, refer to IP Peer Networking Installation
and Commissioning (NN43001-313) .
The NCS is required to provide the Main Office Node IP’s actual status. The
redirection procedure cannot be performed without the NCS. Interaction
with the NCS Branch Office requires the same H.323 ID to be configured for
each Branch Office node element (MGC). This H.323 ID exists in the NCS
(NRS H.323 Gatekeeper) Database. If there is no H.323 ID in the NCS
database, the NCS ignores the request for translation from the Branch user
ID (BUID) into associated Main office node IP. For more information on the
NCS, refer to
"MG 1000B Core interoperability" (page 176) and "Adding the
Branch Office endpoints to the NRS database" (page 260) .
Network Routing Service (NRS)
The NRS application provides network-based routing, combining the
following into a single application:
• H.323 Gatekeeper — provides central dialing plan management and
routing for H.323-based endpoints and gateways.
• SIP Redirect Server — provides central dialing plan management and
routing for SIP-based endpoints and gateways.
• NRS Database — stores the central dialing plan in XML format for both
the SIP Redirect Server and the H.323 Gatekeeper. The SIP Redirect
Server and the H.323 Gatekeeper accesses this common endpoint and
gateway database.
• Network Connect Server (NCS) — used only for Media Gateway
1000B (MG 1000B), SRG, Geographic Redundancy and Virtual Office
solutions. The NCS allows the Line TPS (LTPS) to query the NRS using
the UNIStim protocol.
• NRS Manager web interface — the NRS provides its own web interface
to configure the SIP Redirect Server, the H.323 Gatekeeper, and the
NCS.
The NRS application provides routing services to both H.323 and
SIP-compliant devices. The H.323 Gatekeeper can be configured to support
H.323 routing services, while the SIP Redirect Server can be configured to
support SIP routing services. The H.323 Gatekeeper and the SIP Redirect
Server can reside on the same Signaling Server.
Each system in an IP Peer network must register to the NRS. The NRS
software identifies the IP addresses of systems based on the network-wide
numbering plan. NRS registration eliminates the need for manual
configuration of IP addresses and numbering plan information at every site.
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright © 2007, Nortel Networks
.