Nortel Networks 1000S manual Signaling Server

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System architecture Page 27 of 44

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).

Communication Server 1000S Overview

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Contents Nortel Communication Server Communication Server 1000SPage Revision history 4 of 44 Revision history Standard 3.00 August Contents Configuration options Subject About this documentRelated information Applicable systemsIntended audience ConventionsCD-ROM Online10 of 44 About this document Standard 3.00 August Contents Description and featuresMigrating to an IP telephony network IntroductionInternet Enabling Features CapacityFlexibility and redundancy CallPilot applications Software applicationsSymposium Call Center Server Nortel Integrated Recorded AnnouncerNortel Remote Gateway Nortel Integrated Call Director Nortel Hospitality Integrated Voice ServicesNortel Integrated Call Assistant Nortel Integrated Conference BridgeEnhanced system management Optivity Telephony ManagerElement Manager Terminal equipment Wireless LAN Wireless telephonesIP Phones Digital telephones IP Phone adapterAnalog telephones and devices Attendant consoles Interworking/InteroperabilitySystem architecture Hardware architecture CS 1000S components in a rack Call Server Small System Controller cardMedia Gateway 1000S SSC card Signaling Server SIP/H.323 Signaling Gateways Network Routing ServiceTerminal Proxy Server Media Gateway 1000S Ethernet switch customer-supplied Power over LAN optionalInfrastructure Software architecture 32 of 44 System architecture Standard 3.00 August Configuration options 34 of 44 Configuration options Single campus deployments example Single campus deployment36 of 44 Configuration options Campus Multiple buildings in a campusCentral Call Server with branch office Multiple sitesRouting to and from local branch offices Distributed Call Servers Distributed Call ServersReliability strategies 42 of 44 Configuration options Network failure with survivable MG 1000S systems IP telephony node configuration44 of 44 Configuration options Page Overview Communication Server 1000S