Very occasionally, you may experience calls on your VoIP phone that look as though you have called yourself from an extension you don't recognise, or have come from a number that doesn’t look real. Sometimes these calls can present like an ordinary call as well, but you can't see them in your dashboard.

These are known as Ghost Calls & are unfortunately a well-known problem in VoIP; they're very similar to autodiallers on a regular analogue line. They have nothing to do with your provider or your equipment, they're just extremely annoying when they become regular!

There are a couple of ways to stop Ghost Calls coming through, depending on which phone you have:

1. Changing the SIP Port - Most sip ports are set to 5060 by default so by changing this port to another e.g 6085, means the Ghost Calls won't be able to get through so regularly
2. A lot of phones will have a setting to disable these direct IP calls - there are links to the various FAQs below

If you’re having trouble with Ghost Calls, we have plenty of FAQs showing you how to disable them below:

• Grandstream 16x and 21xx series IP phones
• Grandstream HT Adaptors 
• Yealink W52P
• Yealink T48G
• ObIHAI 10XX Series