17/9/07
Centre for Cities install a VoIP phone system, allowing them
to run both voice and data over one network >>>
14/9/07
Thesis Asset Management Plc report a 25% decrease in call
spend after using the TwistedPair Least Cost Routing service >>>
11/9/07
Reynolds Partners install a high powered and reliable phone systems with audio conferencing capabilities >>>
What is Session Initiation Protocol (SIP)?
SIP is spilt in to three different yet over lapping technologies; Voice, Text and Video. The G3 mobile network is built on SIP protocols. You may have heard of presence, as in best method of contacting some one, either by voice, text or e-mail, this is also based on SIP, this is an enterprise application which will rapidly move into the SME market. Companies such as Microsoft have been actively using SIP as a protocol for a range of applications such as unified communications server.
SIP provides a signalling and call setup protocol for IP-based communications that can support a superset of the call processing functions and features present in the public switched telephone network (PSTN). SIP by itself does not define these features; rather, its focus is call-setup and signalling. However, it has been designed to enable the building of such features in network elements known as Proxy Servers and User Agents. These are features that permit familiar telephone-like operations: dialling a number, causing a phone to ring, hearing ring back tones or a busy signal. Implementation and terminology are different in the SIP world but to the end-user, the behaviour is similar.
SIP is the next logical step in the evolution of voice communications; routing voice calls over the internet provides additional features over and above ISDN and analogue lines. They are more cost effective.
A SIP Trunk is the equivalent of an ISDN channel, depending on your telephony equipment you can mix and match the amount of SIP Trunks and telephone numbers/DDI ranges.
Number Provision
We can provide telephone numbers throughout the UK, Europe and the US. A company based in Manchester can be provided with a London telephone number and vice versa; providing you with local presence. SIP trunking is routed over the internet, therefore we point your telephone number to your IP address which can be anywhere in the world.
Number Porting
Moving from London to Manchester and want to retain your London number/s? No problem. We can port your numbers on to our platform and deliver to any IP address in the world. Number porting involves a paper chain; ports can take up to 30 working days from start to completion.
Want More information?
Contact us on info@twistedpair.co.uk or download a Guide to SIP 
Here