Softswitch Protocol

The softswitch protocol supports VoIP applications.

Networking protocols serve as a set of rules underwriting the interaction among several networking and communications components. The softswitch protocol is one such protocol.

Identification

A softswitch is a software-based switching system. It functions as an application program interface (API) bridging the public switch telephone network (PSTN) and voice over Internet protocol (VoIP) communications network. The softswitch protocol establishes the rules and specifications governing the softswitch interface with VoIP and PSTN components to deliver a mixture of voice, fax, data and video over a VoIP system.

Function

A VoIP system operates several internal protocols such as session initiation protocol (SIP), which connects the standard phone private branch exchange (PBX) to the Internet, and the H323 protocol, which defines a set of protocols to provide audio and visual communication over a computer network. The softswitch supports VoIP systems, such as providing simultaneous and transparent support of the SIP and H323 protocols.

Significance

VoIP telephone services revolutionized the voice telephony options for the average consumer. Softswitch and the associated communication protocols aid in expanding VoIP services to include faxes, video and other digital communications products.

References

• Webopedia: Software
• Webopedia: PSTN
• VoIP Switch: Softswitch Features
• Tech Target: What is SIP Trunking
• 3CX: What is H323