STUN: What Is sipgate's STUN Server?

Any reliable, publicly available STUN Server may be used with sipgate services.

sipgate's STUN Server is: stun.sipgate.net

STUN Server port: 3478

What is STUN?

The STUN Protocol, or Session Traversal Utilities for NAT, can assist devices behind a NAT firewall or router with routing UDP packets.

Router related problems can lead to a wide range of issues, including one-way or lost audio, no dial or ring tones, intermittent loss of registration, and problems making or receiving calls.

For most customers, it's normally enough to know that STUN can solve many NAT router related problems, but isn't designed to be a solution in every situation.

Note: It is always worth trying/testing your devices with STUN both enabled and disabled and seeing which of the two produces the best results. Sometimes you may need to omit STUN to see improvements, or, or the other side, sometimes have it active, to see any improvements.

Use

Instead of changing router's settings to resolve issues, sometimes it may be easier and quicker to first look in your phone's settings and try any or all of the following:

• The use of different Local UDP Ports in your phone's settings;
• Enable your phone's STUN Server
• Power your phone and router off and on (Yes, it sometimes really does help!).

If the problems haven't been resolved, next try the recommendations in the following Help Article:

Problems with Audio, Registering Online or with Making and Receving Calls

Where can I find my phone's STUN settings?

Have you checked your phone's manual or the manufacturer's website?

We've pictorial set up guides for many popular VoIP phones and devices in our Help Centre.

In the settings menus of most phones you'll only need to enter the STUN Server. Otherwise there will usually be separate STUN Server and Port fields. With some phones you'll need to use a special format: stun.sipgate.net:3478 (or stun.sipgate.net:10000)

Older SIP VoIP phones, devices and applications may not support STUN.

Further Information:

The STUN Protocol is defined in RFC 5389

http://www.voip-info.org/wiki/view/STUN