My phone lines are continually called by an automated system that seems to simply dial “9” for up to 6 minutes, then hangs up. On my IVRs, 9 is a language change, so the caller swaps IVRs continuously. I recently changed the IVR so that a second attempt to switch language is met with a hangup, but that does not seem to discourage them.
Lastly, the “caller” seems to be blocking caller ID (see log snippet below), so I can’t simply block the number. Over the course of a weekend, these calls can number up to 150. I have even logged a few occurances where the “caller” ties up two of my FXOs at the same time.
- Has anyone else had this occur to them? Any idea what it is? My suspicion is that they are trying to obtain an outside line.
- Is there anything I can do to block this without affecting other calls?
[2013-04-29 08:26:23] VERBOSE sig_analog.c: – Starting simple switch on ‘DAHDI/4-1’
[2013-04-29 08:26:24] DEBUG chan_dahdi.c: CallerID number: (null), name: (null), flags=6
[2013-04-29 08:26:24] VERBOSE pbx.c: – Executing [[email protected]:1] NoOp(“DAHDI/4-1”, "Entering from-dahdi with DID == ") in new stack