VoiceLines & Calls

Free SIP Calls *

We offer free calls to Local National and Mobiles* Stay with Seriun and you can have it for life.

SIP Trunking 


What is SIP Trunking?


SIP trunking is a Voice over Internet Protocol and streaming media service based on the Session Initiation Protocol. We can deliver telephone services and unified communications to customers wanting a SIP-based private branch exchange and Unified Communications facilities.

What are the benefits of SIP Trunking?


Compared to ISDN SIP trunking is cheaper per channel and more flexible in how and where geographic telephone numbers can be used. It’s also quicker to install and as standard, it delivers extremely robust business continuity. 

The service can support connections ranging from two channels for small PBX-equipped businesses to an unlimited number of channels for large businesses and contact centres.


SIP Trunking is perfect for any businesses facing these challenges:


Business Continuity – should you be unlucky enough to suffer from a flood or fire having SIP Trunking will minimize the disruption by diverting calls to a different office.

Adjustable – You can add more lines quickly as and when you need them – ideal for when your busy and the volume of calls increases without any long term contracts or commitments.

Moving Office – if your moving office YOU CAN KEEP YOUR EXISTING NUMBER with SIP Trunks. No diversion of Remote Call Forwarding charges!

Flexible number display – You choose which number you want to display on each call, this is great for contact centres.

*terms and conditions apply

Voice Categories