SIP Service


GTT’s SIP (Session Initiation Protocol) Trunk service is built on a robust VoIP platform. Our SIP Trunking will allow your organisation to retain the advantages of their existing telecoms equipment, whilst gaining the additional functionality and benefits of IP Telephony. Companies can retain their existing handsets and have the flexibility to add remote or central IP users when needed – all of our SIP Trunks are routed with Tier 1 carriers giving you ISDN grade call quality. Our SIP trunks support a wide range of hardware PBX’s and IP handsets.

Business SIP Trunks can be linked to a customer’s current PBX using an IP enabled PBX or by using a Media Gateway. Outgoing calls are then routed through the PBX and out via SIP Trunking instead of using costly traditional phone lines. At this point, the IP call can be routed using the Customer’s current data provider. Alternatively, GTT can assist with the migration or supply of data connectivity including ASDL, SDSL and leased lines.

This solution offers a future-proofed and innovative service to customers who do not wish to replace their existing telecoms equipment. Customers also benefit from the ability to take advantage of IP Telephony features when right for them whilst also continuing to maximise existing infrastucture and reduce call costs.

We can advise you with the most cost effective telephone solution tailored to your companies needs.

We also offer Corporate SIP Trunks; you can benefit from a dedicated account manager and reduced pricing.

For further information on our SIP Trunks please contact us or speak to one of our Sales Team on 27(0)11 056 6256.

SIP Services