We do not recommend using our industrial 4G routers with a standard SIM card for office VoIP.

First of all, using a standard 4G Data SIM will not usually work for VoIP because UK Mobile Phone networks will use CGNAT (Carrier Grade NAT) which basically means that when your RUT950 router connects to EE (for example) then EE will provide the 4G router with a PRIVATE IP address which is behind a shared PUBLIC IP address.  This creates problems with authentication to your VoIP provider as well as issues with traffic routing and usually ends up with only a one way call.

The other issue with using a standard 4G Data SIM card directly from the UK mobile networks is latency at peak times.  During peak times, latency can be too excessive for reliable and good quality VoIP calls and you do not want your business offering poor quality voice services to your customers.  this latency also causes issues with UC (Unified Communications) solutions.

So how do I get a reliable VoIP over 4G service?

The answer is an innovative managed 4G solution that provides a reliable 4G connection with fixed, public IP address and the 4G connection is managed by software to ensure consistent bandwidth and low latency so you can run high quality VoIP Calls, Unified Communications and even use the link for your office 4G Internet browsing and email.

In fact our SUPER DATA Solution is the equivalent of a Leased Line but using 4G mobile broadband.  The SUPERDATA 4G Connection can also be used as 4G backup solution for leased lines and DSL services.

SUPER DATA FIXED IP SIM – 500 GB and 1000 GB