> > Actually Dan, you are mistaken here, many serial fax/data/voice modems > > come with answering machine programs which tell the modem to > > send the voice data through the serial line. Also the vgetty > > program in linux does the same. > > The problem is using the AT command set, not whether or not serial > communications can carry voice. Remember that T1 is just a really fast > serial line. > > The AT command set is a remnant of low power computing. You issue a > command to get started with voice mode. Then you set it in record mode, > and look to see if there is incoming audio. Then you issue a command to > send audio when you have some in your queue.
This is WRONG. Please lookup the (AT) VTR command - simultaneous voice transmit and receive that gives full duplex for modems that support it (including iNTRA2/4/8 in Australia, according to the manufaturer) I spent a long time researching this (just try googling for VTR and see how many Video Tape Recorders you will find...) some months ago when I first started talking about using full duplex voice modems. All this time I thought you kept ignoring me because of financial reasons (ie maybe you would be getting the zaptel approved for australia) not because you thought I didn`t know what I was talking about ;-) Check these links: http://www.vee90.net/atcom/BCM/v92/BCMV92_Modem7.html http://pcdesguide.org/pc99/chapt19.htm which references the the ITU-T V.253 standard - "V.253 includes small corrections to TIA-695 and adds provisions for bi-directional, digitized voice over the serial port." (personally afaik full duplex voice over serial sucks however - not a problem with PCI cards tho) http://www.vocpsystem.com/vgetty_modems.php?mode=function - the best site (which I just spent the last half-hour finding again...) Cheers, Mathew _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
