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Interfacing HT9200 to telephone line

Discussion in 'Robotics & Mechatronics' started by Ajit, Mar 30, 2003.

  1. Ajit

    Ajit New Member

    Joined:
    Mar 30, 2003
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    Hi ,
    Can anyone suggest how to interface the DTMF output of HT9200 IC to the telephone line ......

    Thanx
    - ajit
     
  2. kinjalgp

    kinjalgp Active Member

    Joined:
    Oct 28, 2002
    Messages:
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    Location:
    INDIA/USA
    You can use opto-isolator, isolation transformer or a bridge rectifier to interface your chip to telephone line.
    Line of warning: Attaching any device to telephone line without permission is illegal.
     

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