SIP trunking is a cost effective alternative to ISDN2 or ISDN30 circuits. At as little as £5 month per trunk there are significant savings that can be made and many advantages of deploying SIP trunks that include:
- Flexible numbering - allows you to work from London on a Glasgow number
- Supports multi sites, allowing ISDN Line rationalisation
- Provides free calls between IP sites and lower cost calls to other destinations
- Full business continuity model for businesses without Remote Call Forwarding charges
- Scalable on a per channel basis
- Can be utilised with existing customer premises equipment
If you are interested in SIP trunks please do not hesitate to contact us. Whether you have a requirement for new office or would like to migrate existing ISDN lines over to SIP trunks, ANT Telecom can help.
What is a SIP trunk?
A SIP trunk is a logical connection between an IP PBX and a Service Provider's application server which allows voice over IP traffic to be exchanged between the two. When a call is placed from an internal phone to an external number, the IP-PBX sends the necessary information to the SIP trunk provider who establishes the call to the dialled number and acts as an intermediary for the call. All signalling and voice traffic between the IP-PBX and the provider is exchanged using SIP and RTP protocol packets over the IP network.