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@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@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@valiant.com To: freeswitch-users@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@valiant.com www.valiant.com 516-224-1908
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