Dear list members, Even though I found extremely reasonable not sending any audio when a PROGRESS message is received on a PRI channel (isn't it an early-media session or one-way audio session?), nevertheless some Italian IVRs expect the user to select the proper option by sending DTMF. Now my asterisk box understands correctly the DTMFs on the caller SIP channel, but it doesn't forward them on the Zap channel. Are there any configuration or any other way to let the asterisk forwards the DTMFs to a zap channel in progress? Any suggestions are very appreciated, Thanks for your attention, Regards, Francesco PS I'm using Asterisk 1.4