asterisk users - Apr 2005 - Detecting when a called mobile is not reachable?

Hello all,

I was hoping to be able to call a mobile and if it is un-reachable for 
whatever reason (e.g. switched off) then I was expecting an unobtainable 
response that would be detected in Asterisk. It seems that the operator 
(Virgin in UK) imedately completes the call and plays an automated 
message before clearing the call. Does anyone know if there a way of 
avoiding the call completion for mobiles? I have noticed that Sipgate 
charge for a calls to an unavailable mobile regardless.

Thanks.

Ian.

This is traditional accross the mobile / cell providers, and there is
no real way around it.

Background : The only way to ensure that a mobile is truly there is to
page the mobile, normally based on the Mobile Switching Centre (MSC)
coverage area, and thats after looking up on the subscirbers HLR, its
a lot of signalling for a call not to connect, and a cost to the
operator.

With the rate that mobile operators charge the A party for the call,
they get a percentage of the call from the originating operator, so
they get cash as soon as it connects, and therefor its in their
interest to connect that call, even if its to an announcement shelf.

Its one of the reasons they invented voicemail!!!!

If there is a way around it, don't shout it too loudly

David

On Apr 3, 2005 8:56 PM, Ian Hailey <asterisk@dinplug.com>
wrote:
> Hello all,
> 
> I was hoping to be able to call a mobile and if it is un-reachable for
> whatever reason (e.g. switched off) then I was expecting an unobtainable
> response that would be detected in Asterisk. It seems that the operator
> (Virgin in UK) imedately completes the call and plays an automated
> message before clearing the call. Does anyone know if there a way of
> avoiding the call completion for mobiles? I have noticed that Sipgate
> charge for a calls to an unavailable mobile regardless.
> 
> Thanks.
> 
> Ian.
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
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>    http://lists.digium.com/mailman/listinfo/asterisk-users
>

> On Apr 3, 2005 8:56 PM, Ian Hailey <asterisk@dinplug.com> wrote:
> 
>>Hello all,
>>
>>I was hoping to be able to call a mobile and if it is un-reachable for
>>whatever reason (e.g. switched off) then I was expecting an unobtainable
>>response that would be detected in Asterisk. It seems that the operator
>>(Virgin in UK) imedately completes the call and plays an automated
>>message before clearing the call. Does anyone know if there a way of
>>avoiding the call completion for mobiles? I have noticed that Sipgate
>>charge for a calls to an unavailable mobile regardless.
Bellsouth at least WILL play an automated message, but NOT answer the 
line.  I work around this by adding the "r" option to the Dial
command.
  The "r" option of course provides a fake ringing sound to the
caller,
even if it REALLY should be doing something else like playing telco 
audio before answer, or a busy tone.

This is quite interesting.

I tested calls to 2 mobiles that I knew were off, and not diverted to 
voicemail. 1 with Telstra, the other with vodafone (I'm in Australia). Via 
ISDN, both calls were shown as unanswered by asterisk. When the calls went 
to voicemail, the call was deemed to be answered.

Via analogue circuits, the call is shown as answered, no matter what.




----- Original Message ----- 
From: "Ian Hailey" <asterisk@dinplug.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users@lists.digium.com>
Sent: Monday, April 04, 2005 5:56 AM
Subject: [Asterisk-Users] Detecting when a called mobile is not reachable?

> Hello all,
>
> I was hoping to be able to call a mobile and if it is un-reachable for 
> whatever reason (e.g. switched off) then I was expecting an unobtainable 
> response that would be detected in Asterisk. It seems that the operator 
> (Virgin in UK) imedately completes the call and plays an automated message 
> before clearing the call. Does anyone know if there a way of avoiding the 
> call completion for mobiles? I have noticed that Sipgate charge for a 
> calls to an unavailable mobile regardless.
>
> Thanks.
>
> Ian.
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>