Business solutions using

SIP trunking

SIP trunking is the fastest-growing telephony service and delivers more capabilities at a significantly lower cost than traditional phone services. SIP trunking allows voice and data communications to utilise the same network, resulting in lower costs and greater flexibility and ability to respond to growth and changing demands.

SIP Benefits

Flexibility with phone


SIP trunking enables you to move office and keep the same geographic number without any ongoing call-forwarding costs.

Business continuity

If your office has to be temporarily relocated in an emergency, this can be achieved quickly and cost-effectively with SIP trunking to keep your business working.

Line rationalisation

For businesses with multiple sites, SIP trunking provides the opportunity for line rationalisation and reduces the number of PBXs you need to maintain.

Save money

IP connectivity costs less than ISDN with lower call costs, free internal calls between extensions and offices and lower line rental costs for multi-sites.


SIP trunking provides a phone service that will  give you business-grade resilience. SIP  enables you to load balance your calls between sites during peak hours.

Compatible with Skype for Business

Our SIP Trunks are are to interoperate with Skype for Business, allowing you to directly connect to the Skype FB to make external calls.

Find out how much you could save with SIP

Call 0845 450 8400

for a quote today

How SIP trunks work


Your Premises

SIP Trunks

Ethernet or

fibre connection


SIP Trunks connect your PBX to the carrier's (Gamma’s) 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.


5 Naysmith Court

Houston Industrial Estate


EH54 5EG