We often find that our customers have a misconception of Session Border Controllers (SBC). Customers that request a SBC often times need a SIP Proxy rather than a true Session Border Controller.
In general, people think of SBCs as a proxy that can be used for routing, security, and
other types of network administration. Customers seeking some sort of routing
administration – Least Cost Routing, for example – will request an SBC, thinking that is
the solution to their need.
However, an SBC is actually a back-to-back user agent SIP application with a wide variety of other uses such as policy-based access control, transcoding, topology concealment, call accounting, QoS, and call quality statistics.
On the other hand, a SIP Proxy is an IP PBX component used for call functions such as routing. A SIP proxy will send SIP requests to the appropriate destination and return a response. SIP Proxies may also be used for registration, authorization, security, network control, and other call functions.
This post was featured here.
More posts like this one: