Jim's email, mentioning the necessity of adding the chan_usbradio.o and chan_usbradio.so lines to the asterisk/channels/Makefile, brings a 'gotcha' to mind: Besides being contained in Jim's email, the additional Makefile instructions are also in the 'Using A Modified USB Sound Fob With App_rpt' document. One might be tempted to append the additions to the Makefile by means of 'cut and paste'. If you use a Microsoft email client or word processor to do the 'cutting', a corruption may occur. Specifically, the leading hyphen in '-lasound' may be brought into Vim (or your Linux editor) as a Microsoft 'en dash' (0x96). This will provide lots of entertainment as the compilation proceeds. The previous hyphen in 'LIBS+=-lusb' is not corrupted, due to being in the middle of a string. FWIW. 73, David VE7MQ.