> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Ken Alker > Sent: Tuesday, January 20, 2004 1:37 PM > To: [EMAIL PROTECTED] > Subject: [Asterisk-Users] DTMF A-D > [...] > I've know about DTMF A-D for 20+ years now, but have never > heard anyone > mention it before, or use it, for that matter (except in old "silver > boxing" in the bad ol' days). Can you elaborate upon how you'd take > advantage of DTMF A-D, how you'd produce the tones (are these > standard > now?), and what exactly you mean by "muting from the far-end"? [...]
Let me take a crack at this one: 4th column tones have been standard for a very long time, and are often used for conference control functions. I have several phones that have A-D on them. Which I'm sure is where the original poster would want far-end muting capability (no need to blast DTMF into a conference call for all to hear when you are performing control functions on the call). Whether this is the best way to do things today, especially in hybrid environments is another discussion. My personal preference is to see those nasty things (all in-band signaling, for that matter) die off in favor of more modern control methods made much more accessible with SIP phones and large, programmable displays with soft buttons. Daryl G. Jurbala BMPC Network Operations Tel (NY): +1 917 477 0468 x235 Tel (MI): +1 616 608 0004 x235 Tel (UK): +44 208 792 6813 x235 Fax: +1 508 526 8500 INOC-DBA: 26412*DGJ PGP Key: http://www.introspect.net/pgp _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
