Telephone Trainer - LED indication provided for LINE IN, HOOK, TONE and RINGER. Tone with Frequency of 430Hz and pulse dialer are provided through switch. 4 x 3 Matrix Keyboard Containing 0 - 9, # & * . Mute, Redial, Flash and On/Off Hook switches. Dialer and Ringer section with Ringer Volume control through Potentiometer.

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