[asterisk-dev] Problem with phantom rings....

[Eric "ManxPower" Wieling]

Mike Jagdis wrote:
> On Mon, Mar 26, 2007 at 11:22:35AM +0300, Marius Stankevičius wrote:
>> A problem is noisy line.... every 2-5 minutes (even if there was no previous
>> activity) I get noise that registers as an incoming call on CO line. If the
>> call gets picked up it gives dialtone (Digium TDM400P card with 4 FXO
>> ports). It _is not_ voicemail. Caller ID set to yes and it is not a polarity
>> issue (turned that off)
> 
> If it's that bad and it's unfixable by your provider (a) I hope you're
> not paying them and (b) the problem is the ring detection at the
> driver/hardware level.
> 
> The hardware ring detection is tunable to some extent, but I really
> couldn't say in what way (although the "how" is just tweak some
> registers).
> 
> Fortunately wctdm.c also has an alternate, driver level ring detection
> routine. Try uncommenting AUDIO_RINGCHECK near the top of wctdm.c.
> You may also need to tweak MINPEGTIME, PEGTIME and PEGCOUNT further
> down. (Note: the AUDIO_RINGCHECK code may not be as well tested...)

pbx-1*CLI> show applications like ring
     -= Matching Asterisk Applications =-
                Ringing: Indicate ringing tone
            WaitForRing: Wait for Ring Application

pbx-1*CLI> show application waitforring
   -= Info about application 'WaitForRing' =-

[Synopsis]
Wait for Ring Application

[Description]
   WaitForRing(timeout)
Returns 0 after waiting at least timeout seconds. and
only after the next ring has completed.  Returns 0 on
success or -1 on hangup