Nortel Networks 1000S - Manual (Page 27)

System architecture Page 27 of 44
Communication Server 1000S Overview
Signaling Server
CS 1000S systems use a Signaling Server. The Signaling Server is an
industry-standard, PC-based server that provides a central processor to drive
H.323 and Session Initiation Protocol (SIP) signaling for IP Phones and
IP Peer Networking. It provides signaling interfaces to the IP network using
software components that operate on the VxWorks™ real-time operating
system.
The Signaling Server has both an ELAN and TLAN network interface. The
Signaling Server communicates with the Call Server through the ELAN
subnet.
The Signaling Server is mounted in a 19-inch rack. The Signaling Server can
be installed in a load-sharing redundant configuration for higher scalability
and reliability.
The following software components operate on the Signaling Server:
• Terminal Proxy Server
• SIP/H.323 Signaling Gateways
• Network Routing Service
• Element Manager
All the software elements can coexist on one Signaling Server or reside
individually on separate Signaling Servers, depending on traffic and
redundancy requirements for each element.
For more information about H.323 and SIP Trunking, refer to IP Peer
Networking: Installation and Configuration (553-3001-213).