B2BUA

AcronymDefinition
B2BUABack-To-Back User Agent
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the entire call state by the B2BUA, enabling usage, billing,
is processed by the B2BUA, developers using the RADVISION SIP
B2BUA takes what is traditionally a SIP end-to-end call and mediates it through a central SIP server, enabling service providers to manage and track a call from beginning to end, integrate and offer new value added features, and generally bring PSTN-type functionality to IP networks.
5 of this award-winning toolkit features enhanced server-grade application capabilities, a new internal multi-threading model, additional support of IPv6 and multi-homed hosts, in addition to the new B2BUA and Presence modules.
We at RADVISION have been tracking both the needs of our development customers and the SIP standards bodies closely and we now feel that presence functionality and B2BUA, which enables true call control and protocol interworking, are crucial features of any SIP development kit.
With the Back-to-Back User Agent (B2BUA) module, the SIP server becomes an active participant in the call from beginning to end, as all signaling messages pass through and are processed by the B2BUA at all times.
The B2BUA component enabled them to reliably control the routing and connection of calls.
RADVISION's SIP Server Platform provides a complete framework for developing all types of SIP Server applications including proxies, redirect servers, registrars, presence servers and different types of B2BUAs.
This new version of the RADVISION B2BUA also delivers an implementation of Third-Party Call Control (3PCC) state machine enabling applications developed using the RADVISION solution to connect a call between two parties and transfer a connected call to a third party.
It is well suited for developing proxy servers, presence servers, general events servers, B2BUAs, registrars, redirect servers, soft switches, call session control functions (CSCFs), IP-PBX, and application servers (including conference servers, instant messaging chat rooms, third-party control servers).