Who called from 7204441000

This is ridiculous.  They call multiple times in a row and there is no one there.

We have been getting unsoliceted calls from this number for years, they usually call 3 times in a row, at definite intervals of 1 and 3 minutes, at any time of the day AND NIGHT. Actually the number only showed on the caller ID for a few calls, then it went back to showing as Unknown, but we could tell it was Avaya from the specific calling pattern of 3 calls. I've looked up the company and found a different number, tried calling, no one seemed to be able to help, had me sent an email to [email protected] that was repeatedly rejected.

I believe this is Avaya calling a remote device, like a modem.  We have a customer that ported over the number and now it rings when Avaya is doing maintenance or record reconciliation.

called me for 15 mins straight at 4am this morning. No one was on the other line but when I called back that was no help either. What is this Avaya company?