SIP Trunking

DBSL provides free and cheap SIP Trunking services. Businesses using on-premise PBX systems like Avaya or Grandstream can greatly benefit from our Tier-1 business sip trunk service.
SIP trunks offer a lot of flexibility in terms of scaling up the required number of channels. The phone numbers provided with your SIP trunk are not exchange dependent hence they move with you wherever you go.

If you are not currently using a Cloud PBX System, sip trunks help you achieve most benefits of a VoIP phone system by converting your existing PBX from ISDN to SIP.

SIP Trunks, unlike traditional physical wired lines, work over the standard broadband or leased lines. These are virtual lines that are highly scalable and can be setup instantly. With BT shutting down its ISDN network in 2025, SIP trunks are the best option for businesses that need multiple lines for incoming and outgoing calls. Also, these offer upto 70% cheaper local, national and international call rates compared to traditional phone lines. Sip trunk can be deployed and made live within hours as opposed to ISDN or PRI lines that take weeks to be set up.

There are numerous SIP trunk providers in the UK market. Some also offer free SIP trunk services. Free sip trunks are a good choice for testing to ensure your system is compatible with the SIP trunk you wish to connect and verify the sound quality.
However, it is important to understand that free sip trunk is not a viable option for businesses looking for long term security, stability and support.