Nortel's Communication & Application Servers portfolio of telephony and converged IP telephony solutions deliver seamless, scalable real-time customer and business communications with the flexibility and reliability that enable service providers and enterprises to cost-effectively migrate to packet-based networks.

• The Communication Server 1000, Communication Server 2100, and the Multimedia Communication Server 5100 allow Enterprises to manage the strategic transformation of their network at a pace that maximizes the return on current communications assets and eliminates business disruption.
• Targeted to small and medium-sized operators in North America, the Communication Server (CS) 1500 is a second-generation VoIP softswitch that provides a powerful platform for IP communication services. It lays the foundation for future IMS-based multimedia services that will bring unprecedented levels of personalization, security and mobility to communications.
• The Communication Server 2000, Communication Server 2000-Compact and Application Server 5200 allow Service Providers to deliver a comprehensive set of consumer and business communication services, ranging from traditional voice services to multimedia communications.
• Business Communications Manager BCM) delivers small/medium-sized businesses and branch offices the only converged voice/data solution in the industry, providing a choice of IP-enabled or pure-IP strategy.

• Adaptive Application Engine
  This product is within the scope of GENBAND's purchase of Nortel's Carrier VoIP and Application Solutions (CVAS) assets. Go to GENBAND's Power of One page for the latest information. The Nortel Adaptive Application Engine makes meeting the demands of the NGN 2.0 world simple. With the Adaptive Application Engine, service providers can extend voice and multimedia communications into the rapidly expanding Web IP application environment.
• Application Server 5200
  This product is within the scope of GENBAND's purchase of Nortel's Carrier VoIP and Application Solutions (CVAS) assets. Go to GENBAND's Power of One page for the latest information. With the Nortel Application Server 5200, [formerly known as the Multimedia Communications Server 5200 (MCS 5200)] Service Providers can leverage the innovation of the Internet to deliver new multimedia communications services that will radically enhance people's communications experience.
• Communication Server 2000
  This product is within the scope of GENBAND's purchase of Nortel's Carrier VoIP and Application Solutions (CVAS) assets. Go to GENBAND's Power of One page for the latest information. The Communication Server 2000 (CS 2000) is a Nortel Carrier Voice over IP Superclass softswitch on the XA Core Platform. This IMS-ready softswitch can be applied to new network or to existing DMS based networks to allow them to migrate to a VoIP network solution.
• Communication Server 2000-Compact
  This product is within the scope of GENBAND's purchase of Nortel's Carrier VoIP and Application Solutions (CVAS) assets. Go to GENBAND's Power of One page for the latest information. The Communication Server 2000 - Compact is a scalable, reduced-footprint, Superclass softswitch built on the commercially-available Compact PCI platform. Delivering a comprehensive set of Class 4 & 5 features, this IMS-ready carrier-grade softswitch is applicable for new network builds and packet evolution.