SIP Trunking

Providing an alternative solution to traditional ISDN lines, SIP Trunks increase flexibility and scalability as well as delivering significant cost reductions when used as a full or part replacement of traditional telephony lines.

With our expertise in the Telecoms industry Sirius can effectively support both new deployments and the transition from older technologies with ease.

How we Help

Future-proof your business

All businesses will need to move to VoIP telephony by 2027 as traditional phones lines will no longer exist. Get ahead of the curve and future proof your business today.

Cost Savings

Businesses could save up to 40% savings when switching from older technologies, you may even be able to use your current telephone system when changing technology.


There’s no need to wait for an engineer to add additional channels or lines to your solution, we can get them live within minutes.

Disaster Recovery

Your calls can be diverted or delivered immediately to another system should the unexpected happen.

Keep your number

Retain your business number when moving out of area or moving from old telephone lines to SIP

Free inclusive minutes

For calls to UK local, national and mobile numbers* t’s and c’s apply

Get a free, no obligation telecoms audit

Simply send us an email to find out if we can save you money.