Nortel Networks 1000S User Manual

 System architecture

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NRS Database — The 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 H.323 Gatekeeper both access this common 
endpoint and gateway database.

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Network Connect Server (NCS) — The NCS is used only for Media 
Gateway 1000B (MG 1000B) and Virtual Office solutions.

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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.

Element Manager is a software application that provides a web interface to 
configure and maintain system components, including the Signaling Server. 
Single web pages provide access to information traditionally spread into 
multiple overlays.

For more information on the Element Manager application, see “Element 
Manager” on 

The MG 1000S holds Intelligent Peripheral Equipment (IPE) cards and 
application cards. In a normal operational state, the Call Server controls the 
MG 1000S. The MG 1000S processor provides low-level control of the 
interface cards installed in the MG 1000S slots, and communicates with the 
Call Server for feature operation.