|tIPicall Sip Trunking|
tIPicall SIP trunking is built on the TATA Communications Ltd global SIP network providing the highest quality of voice across a tier 1 carrier at very competitive rates.
There are a number of functions and features which process calls in the PSTN. What SIP focuses on is a signalling and call set-up protocol for IP-based communications and SIP has been designed to allow functions and features to be built in via Proxy Servers and User Agents. These features allow telephone-like operations such as dialling, causing a phone to ring, ring-back tones and line busy signals.
Whilst the terminology and implementation of the SIP world is different to the way traditional calls are set up, the end results for the user are very similar.
SIP allows for much more cost-effective voice communication solutions and also provides additional features that ISDN and analogue lines cannot deliver. While a SIP trunk is an alternative to an ISDN channel, as a tIPicall customer, you will have the flexibility to combine the number of SIP trunks and telephone numbers/DDI ranges you need.