Ghost Calls Round 2

[Lansalot]

Hi
We have had similar reports from some of our users and I have come to this conclusion:
The 'cause' of this is BT Hubs.

I found this very useful free site:
http://sipscanner.voicefraud.com/
(Note: I am in no way affiliated with this site)

If you run a scan against an IP address of a BT Hub with a SIP phone behind it (home or business, doesn't seem to make a difference) then you will see SIP services exposed.

If you run a scan against an IP address of another router with a SIP phone behind it, we have a lot of Technicolor (was Thomson) routers - the results show NO SIP services exposed.

The firmware of the phone doesn't seem to make a difference, we have T20s, T22s and Yealink cordless units on various firmwares.

That's as far as I have gotten with our troubleshooting. I haven't tried any of the suggested Yealink settings but if I find out more, I will let you know.
Thanks