[asterisk-users] False answer() being sent by cellphone providers

[Mike Ely]

Thanks for the tip!


On 7/9/10 11:35 AM, "Faisal Hanif" <faisal at vopium.com> wrote:

>    Do some R & D with asterisk function AMD (Answering Machine Detection) if
> that can help you.
>  
>   Signatures faisal at vopium.com
> 
> Regards,
>  
> Faisal Hanif
>  
>  
>  
>  On 7/9/2010 11:24 PM, Danny Nicholas wrote:
>>  
>> 
>> 
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com
>> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Steve Edwards
>> Sent: Friday, July 09, 2010 12:10 PM
>> To: Asterisk Users Mailing List - Non-Commercial Discussion
>> Subject: Re: [asterisk-users] False answer() being sent by cellphone
>> providers
>> 
>> On Fri, 9 Jul 2010, Mike Ely wrote:
>> 
>>  
>>>  
>>>>  
>>>> I've set up an outbound alerting system to play a recording when systems
>>>>  
>>>  
>>  
>> go
>>  
>>>  
>>>>  
>>>> down, etc. and I'm noticing that cellphones tend to answer() and then
>>>>  
>>>  
>>  
>> start
>>  
>>>  
>>>>  
>>>> ringing the actual handset.  So far, I've verified this behavior with
>>>> Verizon, T-Mobile, and Google Voice (the last produces a SERIOUS delta
>>>> between bogus answer and actual answer).
>>>> 
>>>> Has anyone figured out how to detect the actual cellphone answer rather
>>>>  
>>>  
>>  
>> than
>>  
>>>  
>>>>  
>>>> the bogus one sent by the cell carrier?  In the short term, I just have
>>>>  
>>>  
>>  
>> the
>>  
>>>  
>>>>  
>>>> call play MOH for ten seconds before announcing that all hell has broken
>>>> loose in the server room, but it¹d be nice to have something a bit more
>>>> accurate and reliable.
>>>>  
>>>  
>>  
>> 
>> How about a loop with "Please press pound to continue?"
>> --
>> It is a DAHDI "function" that you may or may not get a reliable
>> "notification" of answer.  The best thing to do is to MOH for 7 seconds,
>> then play a message "this is a message from the computer room; press 1 to
>> accept".  This lets you not waste time on a "not real" answer.  Here is a
>> "cliff-note" context:
>> [accept]
>> exten => s,1,Answer
>> exten => s,n,WaitExten(7)
>> exten => s,n,Background(important)
>> exten => s,n,WaitExten(5,m)
>> exten => 1,1,backgrounf(message)
>> exten => 1,n,hangup
>> exten => t,1,hangup
>> exten => i,1,hangup
>> exten => *,1,hangup
>>  
>  
>