I am using the MS Comm control to create a program to act as a speakerphone. I am using AT commands via the MS Comm control to perform this. I have managed to create a program to dial the number & when the call is answered the receiver's voice comes out of the computers speakers, but the receiver cannot hear me talking through the computers microphone. I have tried using sending the following Thisform.MSComm1.Output="AT#CLS=8 #VLS=6 #SPK=1,5,1"+chr(13) #CLS=8 is meant to set the modem to Voice Mode. #VLS=6 selects speakerphone mode. #SPK=1,5,1 sets microphone on, Speaker Output to 10dB, Mic gain to 5dB. I am using a Pace Microlin 56K Voice Internal modem. Thanks for your help. David Renton. mailto:david@css02.globalnet.co.uk mailto:david@css01.globalnet.co.uk http://www.users.globalnet.co.uk/~css01 mailto:drenton@141.com http://www.yi.com/home/RentonDavid