Firewall rules

For registrations and calls to work correctly, you must ensure the following IP ranges are allowed through any local firewalls for UDP traffic:

* 185.110.248.0/26
* 2a06:5a80::/64

And in particular, that port 5060 for SIP registrations, and range 10000-20000 for voice traffic are allowed.

Fine-tune your preferences

There are a number of cookies we need to use in order for our website to work properly. These cannot be disabled.

However, you can disable non-essential cookies for the third-party services we use, to help us provide better customer support, measure the performance of this website and run more effective marketing campaigns.

We use Google Analytics to measure the performance of our website. We do not store any personal data and your IP address is anonymised.

Off
On

We use a live chat service called Natterly so we can privide support to you where available. Various cookies are stored so chats remain active when you change page.

Off
On

We use various tracking cookies to help us measure the performance of our marketing campaigns and show you content and promotions we think you’d be interested in.

Off
On
Allow all
Update your preferences

Hello there!

This website uses cookies in order to provide you with the most relevant information. Please accept cookies for the best experience.

For more details see our Privacy Policy.

I’m OK with that
Cookie preferences