[Freeswitch-users] Detecting payphone

[Mike Burlingame]

you would want your carrier to send you the isup-oli= field like below, based on the isup-oil= you would make your routing decisions  

 From: <sip:+1XXXXXXXXXX at YYY.YYY.YYY.YYY:5060;isup-oli=27>;tag=gK1e00826b

Ref http://www.nanpa.com/number_resource_info/ani_ii_assignments.html for ANI-II Codes 27 and 70 are generally pay phone people also seem to block 29 prison calls



On Aug 14, 2012, at 2:28 PM, Bob Coleman <bobc at devassert.com> wrote:

> Hi Phil,
>  
> We run the same sort of service as you, and have faced the same issue.
>  
> In some countries they provide you with a list of all payphones, not sure whether the US does, but we found that to be the easiest way to record the surcharge.
>  
> Bob
>  
> Date: Tue, 14 Aug 2012 17:19:02 -0400
> From: phil.kim at valiant.com
> To: freeswitch-users at lists.freeswitch.org
> Subject: [Freeswitch-users] Detecting payphone
> 
> Hi all,
>  
> Question might sounds odd but is there any way to detect if a call is coming from a ‘payphone’?
>  
> We have an IVR system which people call in to check in/out of there work. Some calls are coming from a ‘payphone’.
>  
> Problem is our carrier is charging us a huge ‘surcharge’ on those calls maid from ‘payphone’. We would like to block those calls but not sure how to detect them.
>  
> Is there any flag on SIP messages?
>  
> Thank you in advance.
>  
> Best regards,
>  
> Phil H. Kim
> Software Engineer
> VALIANT Workforce Solutions
> phil.kim at valiant.com
> www.valiant.com
> 516-224-1908
>  
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