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Re: [Electronica] Telephone Hold Button

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  • Jack Emery
    Thanks for circuits...Jack Emery ... From: Nicolae Sfetcu To: Y: Electronics Sent: Monday, August 05, 2002 11:19 AM Subject: [Electronica] Telephone Hold
    Message 1 of 1 , Aug 5, 2002
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      Thanks for circuits...Jack Emery
      ----- Original Message -----
      Sent: Monday, August 05, 2002 11:19 AM
      Subject: [Electronica] Telephone Hold Button

      Telephone Hold Button

      Although a hold feature is standard on most new phones, a lot of us still use the origional bell phones. Those of us that require a hold feature will find this circuit very useful. It is easy to build, and is compact enough to be installed inside the phone with no real problem. It is also powered by the phone line itself, eliminating the need for batteries.


      This is the schematic of the Phone Hold Button


      Total Qty.
      R111.5K 1/4 W Resistor
      R211K 1/4W Resistor
      D111N4002 Silicon Diode1N4003, 1N4004, 1N4005, 1N4006, 1N4007
      SCR11C106Y SCR
      LED11Red LEDGreen LED, Yellow LED
      S11Normally Open Push-Button Switch
      MISC1Wire, Board, Case (If Used)


      1. To place a call on hold, simply hold down the button while hanging up the phone. To take a call off hold, just pick up the phone, or any extension.

      2. Even though this is a simple circuit, you may have to check with your phone company before use.

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