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SIP Trunking Overview

Compared to ISDN, SIP Trunking is cheaper on a per channel basis, more flexible in terms of what telephone numbers you can have and where you can have them, is quicker to install and offers a very robust business continuity service that ensures your business never loses calls.

SIP Trunking connects your PBX to our network enabling full PSTN breakout on the public telephone network. Connection from your site or sites to our network is via an IP connection, for example broadband or Ethernet, and is delivered as an end-to-end service with an availability guarantee, voice channel guarantees, and voice quality of service assurances.

SIP Trunking Benefits

Flexibility With Your Phone Numbers

Allows you to move office and keep your same geographic number without any ongoing call forwarding costs and costs associated with new company stationery.

Line Rationalisation

For businesses with multiple sites, SIP Trunking provides ISDN line rationalisation options and reduces the number of PBXs that you are required to maintain.

Save Money

SIP Trunking costs less than ISDN with lower call costs, free internal calls between extensions and offices (including international calls) and lower line rental costs for multi sites.

Voice and Internet Convergence

With SIP Trunking delivered over Ethernet, you can have both a high quality voice and data service all over one connection, giving you significant cost savings.


A phone service that will cope with any situation and give you 99.9% up time on your telephony. Keep your business running without expensive call forwarding costs at uneasy times.

Business Continuity

If your office has to be temporarily relocated in an emergency, there's no need to worry as this can quickly and cost effectively be achieved through the use of SIP Trunking.