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 <http://www.valiant.com/> 516-224-1908 The information contained in this e-mail message, and any attachment thereto, is the property of Valiant and is confidential and may not be disclosed without our express permission. If you are not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution or copying of this message, or any attachment thereto, in whole or in part, is strictly prohibited. If you have received this message in error, please immediately notify us by telephone, fax or e-mail and delete the message and all of its attachments. Thank you. Every effort is made to keep our network free from viruses. You should, however, review this e-mail message, as well as any attachment thereto, for viruses. We take no responsibility and have no liability for any computer virus which may be transferred via this e-mail message.