Hello All, I have been using FreeSWITCH over the last two years on both inbound and outbound dialing. I have a problem with Outbound calling. This does not occur all the time, but often enough for us to be concerned. We have an IVR system that make an outbound call to our client and process the call flow using DTMF. Often times when user answers the call, there is nothing but static sound. It does not respond to any DTMF, and does not play any sound file either. It just hangs there with little static sound in background. I have consulted my SIP provider but they have no idea either. Any one has any idea what might be causing the issue? Thank you in advance. Best regards, Phil H. Kim Software Engineer 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.