Short for Session Initiated Protocol, or Session Initiation Protocol, an application-layer control protocol; a signalling protocol for Internet Telephony. SIP can establish sessions for features such as audio/videoconferencing, interactive gaming, and call forwarding to be deployed over IP networks, thus enabling service providers to integrate basic IP telephony services with Web, e-mail, and chat services. In addition to user authentication, redirect and registration services, SIP Server supports traditional telephony features such as personal mobility, time-of-day routing and call forwarding based on the geographical location of the person being called. SIP is the protocol for Voice over IP

Over the past few years many organisations have derived enormous benefit from providing IP LAN connectivity between offices. The SIP Voice Over IP Gateway presents a new opportunity for these organisations to retain trunks in remote locations and provide free high quality speech communication over the same link already being used by the LAN traffic.

Many organisations choose to host trunks in a central location and then use VoIP technology to distribute the calls to remote sites however there can be a number of reasons why you would wish to use trunks in remote locations such as:

• Retain that 'golden number' that your company has had for many years
• Save on local calls from the remote sites
• Reduce traffic over your LAN/WAN local calls do not go via the main site
• No need to have stationery reprinted or to advise customers of new numbers
• Use LCR to route calls via your remote locations to reduce costs

The Telrad Connegy range of SIP VoIP gateways offers a range of technology allowing you to use Analogue, Basic Rate or Primary Rate ISDN.

SIP Trunks

The gateways provide trunks that are a part of the telephone system so they can be controlled by central programming, they can appear on a Busy Lamp Field key, and the incoming call routing can be to anywhere on the system in fact  a call can ring in a number of different locations, imagine a call to your New York Office could ring in London, Paris and New York at the same time.

All of the SIP gateways can be managed by browser access so it does not matter where a gateway is situated administration is only a click away.