Nortel has a strong presence in both enterprise as well as carrier switching markets. Its three main products are the Business Communications Manager (BCM), the Communications Server (CS) 1000 and 2000, and the Multimedia Communications Server (MCS) 5100 and 5200.
SMBs and regional offices can utilize the BCM, which is an IP-enabled, single-platform communications system. It can also be used as a hosted solution for small sites. The BCM can scale up to 200 digital or IP-based stations and offers a number of applications such as routing, fax, voice messaging, IVR, wireless capabilities, etc.
The Communications Server 1000, which is a server-based IP-PBX, comes with more than 450 telephony features. The advantages of a converged network and IP applications can be had in one IP PBX. It is targeted at the enterprise market as a private, customer-managed solution, or as a part of a managed service solution from a service provider. It offers support for ISDN, H.323, and SIP signaling and can handle up to 15,000 clients for each call server.
The Communication Server 2000 softswitch is designed for large enterprises. It is a single platform that can be used as the basis for providing a hosted solution to several customers. It is the intelligent core of a multiservice network and offers local and long distance call services.
The Multimedia Communications Servers boost the existing voice and data capabilities by providing SIP-based multimedia and collaborative communications applications. The 5100 server can support up to 60,000 active subscribers and is meant for enterprises, the 5200 server is targeted at hosted service providers and it can support 100,000 subscribers. MCS includes applications such as white boarding and file exchange, co-web browsing, IM, call management, etc.