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SIP Trunking

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.

1 – 5 channels

Per Channel Per month

5 – 10 channels

Per Channel Per month

10+ channels

Per Channel Per month

You can choose one of the following call plans

1000 Landline Minutes

Unlimited Landline Minutes

200 Mobile Minutes

500 Mobile Minutes

1000 Mobile Minutes

Unlimited UK Landline & Mobile Minutes*

* Applied per user per month (fair usage policy applies)

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.

Benefits of SIP trunks include:
  • Cheaper monthly rentals
  • Cheaper call rates
  • Flexibility and Scalability
  • Inter-Site Connectivity
  • Remote working for employees
  • Failover to mobiles or other devices
  • Real-Time Billing
  • Web Based Management
  • No Activation charges