I work for a medium business and we have Voip in place.
In the last week or so, a couple of our IP phones have displayed the following problem:
You can see a number is being dialed on the display, even though the handset is on hook and not being used.
While you are on a call, you can hear the dial tone, and the dialing of a number.
Also there are strange calls that come in and when you try to pick up the phone, there is no answer, and you just hear the dial tone as if you just picked up the phone to make a call.
Sometimes while the phone is in this ‘trance’ you can hear the phone make a beep noise.
Could it be possible that we are being attacked or hijacked?
I live in Australia and our provider is the second major telecommunications company, and we are using the IP phone “Nortel Networks, IP Phone 2002, Model NTDU91”.
We have logged a service call with our provider, but as usual, they are being hopeless at providing any support.
Thank you in advance for your help!