High Quality Content by WIKIPEDIA articles! The Avaya Aura Application Server 5300 or Avaya Aura AS5300 in telecommunication and computer networking is a secure Unified Communications system designed and manufactured by Nortel. The system provides integrated IP telephony, conferencing, voice mail and instant messaging - all centered around dynamic presence - that meets, US Department of Defense and US federal government security and service assurance requirements. The AS5300 is used for creating, modifying, and terminating two-party or multiparty media streams, supporting up to 25,000 subscribers per system. The Avaya Aura AS5300 is a SIP-based session manager designed to increase productivity and collaboration by allowing users to collaborate using the appropriate tool all in an integrated solution. The AS5300 supports the Session Initiation Protocol, Assured Services Session Initiation Protocol, Secure Real-time Transport Protocol, Session Description protocol Security Descriptions for Media Streams, Transport Layer Security, Nortel encrypted UNIStim, Multilevel precedence and preemption and ANSI PRI Multilevel precedence and preemption T1.619a.

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