Caller-ID on IPO R8.1 Essential is symbols not an number From Comcast 1

[Icarealot]

Our company has a client that is receiving a call every 17 seconds. The call is made to the main number (POTS from Comcast via EMTA. It rings the main number for 15 seconds, disconnects and calls back within 2 seconds. The caller ID is symbols - see attachment. If the system is put in night mode (no rings) it will continue to call all night. If a person picks up the call, they hear nothing. After they hang up, there is a delay in the repetitive call by about 2 hours. We think it is an automated dialer using SIP and spoofing the number as symbols. Comcast has been notified and they see the symbols being delivered to the main number. They verify what we witnessed. Please note the symbols are not in the name field, it is in the number field. Has anyone seen this before? Comcast said they cannot fix this. Any ideas?
Thanks
D

 

[Telecomboy]

Does Comcast have voicemail on that line? This sounds like message notification from Comcast.

 

[Icarealot]

As stated, It is an IP Office Essential Edition. It has automated attendant. Comcast delivers an interruptive or "Stutter" dialtone if they have a new voicemail. We did not ask the Comcast engineer if voicemail was turned on (by accident). It was not supposed to be on. The PBX answers calls. We have had Comcast do a lot of strange things lately. Many outages, hunting mess-ups and added call waiting when not requested. We will check with Comcast.

 

[Telecomboy]

I've had this happen with Comcast before and it was voicemail on the line. I know it should be a stutter dialtone, but they send a signal across the line as well which was causing the IPO to ring/answer. If they do not have reliable disconnect enabled (which I bet they do not) then a call that reaches the AA and hangs up will stay active on the IPO and go to the timeout source of the AA. When that person answers they will hear nothing because nobody really called it was the voicemail signal that triggered it all.

As a side note, make sure they have reliable disconnect enabled on their end so if a caller does hang up during the AA the call will disconnect properly. I have had to have Comcast address this on almost all their installs with the IPO.

 

[Icarealot]

I think you may have nailed it. My technician was reading your answers and he said that is exactly what is happening. Thank You!! I will talk to my client about the solution!!