Audio problems calling *500

[doctorh]

I have some friends with ATA's connected to Voxalot, and many have called me today that they do not have audio return when calling via Internet calls.

They are heard by the called party, but no audio from them to the calling party.

Now, when I ask them to test *500, almost 1/2 of the calls would not connect with Voxalot's voicemail.

Nothing has changed on their setup, but many are saying the same. This seemed to have started on Friday or Saturday.

My conclusion is that something has changed at Voxalot that makes 50% of the calls to *500 have no audio, when it was working 100% OK before.

Can you confirm whether anything has been changed that would cause this behaviour? Or suggest what the problem could be?

Again, all ATAs where working OK until this weekend, and now several are experiencing the same problem.

Thanks
DoctorH