tom@pedsgo.UUCP (06/25/86)
Can anyone point me to some good books or magazine articles about converting between the 600-ohm 2-wire interface used on dial lines and op-amp type audio circuits? Practical circuits/examples would help me the most, but well-written theory will still help. I have purchased an old UDS DAA which does not separate the transmitted and received signals. It has only a 600-ohm 2-wire connection for the 'data' signals. I want to use it with circuitry that handles the received portion alone (DTMF decoding) and with circuitry that handles the transmitted portion alone (voice synthesis, etc.). The DAA will give me a legal I/F to a dial line, but that wont do me much good if I cant get audio data into and out of the thing. I have a EE degree but have spent the past 5 years doing software work, and alot of my efforts in school went to learning practical digital circuits, not analog circuits. If I get some good leads I will check them out (this may take some time) and post a summary. Thanks very much, in advance! NAME: Tom Gillispie UUCP: ...{pesnta|prcrs|princeton|topaz|hjuxa|vax135}!petsd!pedsgo!tom USnail: CONCURRENT Computer Corporation (a Perkin-Elmer Company) M/S 307, 106 Apple St., Tinton Falls, NJ 07724 MA BELL:(201) 758-7321