SIPtrunking is a voice over internet protocol (VOIP) by which internet service providers delivers voice information to anybody with Sessional Initial Protocol(SIP).it is becoming the standard way of connecting organization, enterprises and customer premises. SIP trunk is used to communicate through internet protocol within and outside the organization premises. It uses VOIP PBX that is provided and connected to VOIPproviders ’broadband network and installed ready for use. SIP trunk help to eliminate the traditional method that used cables for communication. The physical wire network is now obsolete and all the connectivity is now achieved by the use of SIPtrunking service provider to connect your phone to the internet.SIPtrunking has got many products that are best utilized by any type of enterprise. Some of the products are:

GO anywhere givesunlimited calling to long distances within United States and local calls. It works with VOIPPBX or TDM PBX. It is used for very many businesses to give reliable communication. It has also optional features which makes it to be used in different scenarios quite easily.

GO Local gives local calling at a very cheap price compared to traditional prices. It has other options available that can be used to make long distance call by pre-purchasing minute bundles or subscribing to low pay rates.

Go domestic is a SIP trunk product with discounted bundles for long distance calling.

Go! Xtras SIP products increase the capabilities of all other products. It has many options such as Local Number Portability, LNP, delivery services, displaying calling names and lookups.

SIP trunk is very cheap to use in any organization or personal use. It eliminates the traditional wiring system that was hectic hence it is cost effective. There is no need of using Basic and Primary Rate Interfaces,PublicSwitched Telephone Network, PSTN, gateways which are costly and time consuming to install. We have three main components that are prerequisite to installation of SIP trunk; PBX which has a SIP permitted trunk, SIPtrunking provider and SIP understanding device or firewall.

VOIPPBXis used in most cases to communicate to different destinations.it is used as an interface for connecting the SIP trunks. Other PBX can also be used such as analog PBX. On the internet the VOIPservice providers connects to your device to their broadband network.SIP trunk has the following benefits

• It is cheap since there is no usage of primary and basic rate interface

• PSTN gateways are not required and purchasing of line cards is avoided

• Very small usage of bandwidth as both data and voice pass in same connection.

• You can select your preferredSIPtrunking service provider with cheap call rates.

SIP trunking gives best applications that you can buy bundles from your service providers’ offers such as unified communication like video, sending messages, mobile integration and web collaboration. SIP trunking should be biddable with SIP connect standards. Compliant SIP trunks help to reduce interoperability checks on the broadband network hence improving its marketability.