SIP VoIP provides an inexpensive way to make and receive phone calls.

A SIP VoIP enabled system transfers data and signals through the internet rather than the PSTN.

SIP VoIP Overview

SIP VoIP stands for Session Internet Protcol Voice over Internet Protcol, and is a technology introduced to improve the system of telephones and make it more cost-effective.

SIP VoIP – A Closer Look

The Session Internet Protocol (SIP) carries session descriptions that allow participants to agree on a set of compatible media types. SIP makes use of elements called proxy servers to help route requests to the user’s curent location, authenticate and authorize users for services, implement provider call-routing policies, and a provide features to users.


AVOXI offers VoIP Termination – SIP Trunking , and can terminate calls to anywhere in the world in a cost-effective, high quality service manner.

Some of the features available with SIP VoIP are:

  • Time of day routing
  • IVR/Auto attendant
  • Call forwarding
  • Five free extensions
  • Conference rooms

SIP was originally designed by Henning Schulzrinne and Mark Handley in 1996. In November 2000, SIP was accepted as a 3GPP signaling protocol and permanent element of the IP Multimedia Subsystem architecture for IP-based streaming multimedia services in cellular systems.

Some of the benefits of SIP VoIP include:

  • Privacy and security
  • Scalability
  • Flexibility
  • Customizable
  • Quality
Call Center Guide

Download the Call Center Guide


Free Demo

Request a Free Demo

Request Demo

Free Quote

Get a Free Quote Today

Get a Quote

Bundled Calling Plans

Toll Free Calling Plans

Get Pricing