[Asterisk-Users] phantom incomming calls from asterisk

[John Millican]

> > > > > > About once a day I have noticed a phantom incoming call with a
> > > > > > caller ID of asterisk at 192.168..<cut off>. When I answer the call
> > > > > > there is a dial tone and the call is disconnected. Any clues?
> > > > > >
> > > > > > David Koski
> > > > >
> > > > > David and List,
> > > > > I am having the same problem.
> > > > > I have an * box at my house with 1 zap (pstn on a X100p clone from
> > > > > digit networks) channel and one sip(linksys ATA).  I am getting
> > > > > ring on the ATA but there is no call comming in from the pstn.  The
> > > > > following is the CLI output when this happens.  I know that there
> > > > > is no call on the pstn because i have an "emergency phone"(frequent
> > > > > power outages) still connected to the PSTN parallel to the * box
> > > > > and it never rings. All the SIP stuff is on an internal lan only. 
> > > > > I only call out on PSTN since all I have available here in nowheare
> > > > > land is dial up :-(  All work flawlessly except for this one
> > > > > problem.
> > > > >
> > > > > - Starting simple switch on 'Zap/1-1'
> > > > > Jul  8 13:49:23 NOTICE[6150]: chan_zap.c:5405 ss_thread: Got event
> > > > > 2 (Ring/Answered)...
> > > > >     -- Executing Dial("Zap/1-1", "sip/677|35") in new stack
> > > > >     -- Called 677
> > > > >     -- SIP/677-55a8 is ringing
> > > > >   == Spawn extension (default, s, 1) exited non-zero on 'Zap/1-1'
> > > > >     -- Hungup 'Zap/1-1'
> > > > > Is there anything for Zap like sip debug? My first guess is that I
> > > > > am getting some sort of blip in ring voltage on the PSTN but have
> > > > > no way to prove this. As a posible logic check I unplugged from
> > > > > PSTN, which put zap into Red alarm of course, and then i get no
> > > > > phantom calls. Is there something in the zap driver that shuts down
> > > > > when in red alarm? Any Ideas?
> > > >
> > > > Try this in zapata.conf for fun:
> > > > busydetect=yes
> > > > busycount=6
> > > >
> > > > Let us know if it makes a difference.
> > >
> > > I have added this to zapata.conf.  Will let you know what happens.  can
> > > you tell me why this might help or point me to a wiki/google?
> >
> > Going from memory only (which might be less then accurate), the busycount
> > parameter essentially extends zap detect time. The comments in
> > zapata.conf refer to detecting busy tone, but something from past memory
> > says the parameter affects more then just busy tone detection.
> >
> > The default value is 4 but I've been using 6 or at least a year with
> > an x100p followed by a TDM04b, and I don't have the false ring issues.
> >
> > Sure wish I would have kept a diary of config changes over the last
> > two years rather then rely on memory. It would have been helpful
> > more than once. :(
>
> Well I added these settings to zapata.conf and am still getting the phantom
> rings, 2 so far this morning!  have been watching ztmonitor and am seeing
> that that rx audio level is showing a constant ###* with an rx gain setting
> of -7.5 in zapata.conf.  If i set gain much less it gets hard to hear voice
> from callers.  With gain at 0.0 i get ########* with some peaks above this.
> Is this normal?
> John M

After watching ztmonitor i have found that the rx audio goes full scale when i 
get the phantom rings, same as with an actual call.  I think I am proving to 
myself that the problem is in the pots line? I am going to try and put a 
meter on the pots line and see if I am getting ring voltage on the phantom 
calls.
John M