12th December 2002 at 00:23
#20962
Mohammad Saman
Guest
Dear Saeid
Try Pleiades P32MXI as TAC and Junior have mentioned above. They work quite well using a DSP voice/tone distinction algorithm. They are a bit expensive though. You might want to try to have design an add on piece for you. Essentially you need a filter that will differentiate between Voice and other signals on your 4Khz band. I am just trying to point out cheaper solutions.