Telephone Hold Button

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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.

Schematic

Parts

Part	Total Qty.	Description	Substitutions
R1	1	1.5K 1/4 W Resistor
R2	1	1K 1/4W Resistor
D1	1	1N4002 Silicon Diode	1N4003, 1N4004, 1N4005, 1N4006, 1N4007
SCR1	1	C106Y SCR
LED1	1	Red LED	Green LED, Yellow LED
S1	1	Normally Open Push-Button Switch
MISC	1	Wire, Board, Case (If Used)

Notes

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.

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

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Comments

Add A Comment

John Telephone Hold Button Tuesday, February 27, 2018 7:45:18 PM

The hold button only needs to be held down to place the call on hold. Once the phone is on hook the loop current will flow through D1 LED1 R1 and SCR1. A suggested modification is what is known in the telephone world as a polarity guard. A polarity guard is bridge rectifier between the telephone line and the polarity sensitive circuit.

Sam Telephone Hold Button Monday, March 12, 2012 6:33:39 PM

Does the button need to be held down for the call to remain on hold or just while the phone is being hung up?

Marc Telephone Hold Button Saturday, March 03, 2012 8:00:47 PM

Hi! I have C106B, it doesnt work... i dont know if C106Y does make a difference? can someone help me? thank you! marC:)

FranciscoL Telephone Hold Button Wednesday, July 30, 2008 5:27:12 PM

Wonder if music-on-hold circuit is available...

siddharth k best work Saturday, March 08, 2008 11:15:02 AM

i was looking for somethig like this ...got it .working well for my telephone...

anonymous Telephone Hold Button Thursday, October 18, 2007 5:10:34 AM

(In reply to GRREG): This circuit simply maintains the line's 'busy' state so that the caller is not disconnected. It does not actually provide any means for transmitting audio signals along the line. The circuit itself can be quite useful, although I personally prefer a PBX system with which I may taunt telemarketers with looping menus >:)

anonymous Telephone Hold Button Thursday, August 02, 2007 2:36:30 PM

This would seem to also work as a "Off Hook" or "Do Not Disturb" device. Just press the button to make your phone "off hook" without hearing a dial tone and alert tone. Just pick up a phone to reset it.

GRREG GRIFFITH Telephone Hold Button Friday, April 20, 2007 9:29:15 PM

IS THERE A WAY TO USE A WIRELESS PHONE BUTTON ARRAY TO PUT CALLERS ON HOLD WITH MUSIC AND LASTLY I WANT TO MAKE ONE MUSIC ON HOLD CIRCUIT FOR SEVERAL PHONES IN DIFFERENT LOCATION IN MY HOME

pat Telephone Hold Button Tuesday, March 13, 2007 5:20:00 PM

I'm going to make a hold button that when pressed plays the boring hold music of my choice from a tape recorder (I will have to rewind the tape each time I put someone on hold though)

vijaykumarv good Friday, March 02, 2007 2:52:37 AM

good

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John	Telephone Hold Button	Tuesday, February 27, 2018 7:45:18 PM
The hold button only needs to be held down to place the call on hold. Once the phone is on hook the loop current will flow through D1 LED1 R1 and SCR1. A suggested modification is what is known in the telephone world as a polarity guard. A polarity guard is bridge rectifier between the telephone line and the polarity sensitive circuit.
Sam	Telephone Hold Button	Monday, March 12, 2012 6:33:39 PM
Does the button need to be held down for the call to remain on hold or just while the phone is being hung up?
Marc	Telephone Hold Button	Saturday, March 03, 2012 8:00:47 PM
Hi! I have C106B, it doesnt work... i dont know if C106Y does make a difference? can someone help me? thank you! marC:)
FranciscoL	Telephone Hold Button	Wednesday, July 30, 2008 5:27:12 PM
Wonder if music-on-hold circuit is available...
siddharth k	best work	Saturday, March 08, 2008 11:15:02 AM
i was looking for somethig like this ...got it .working well for my telephone...
anonymous	Telephone Hold Button	Thursday, October 18, 2007 5:10:34 AM
(In reply to GRREG): This circuit simply maintains the line's 'busy' state so that the caller is not disconnected. It does not actually provide any means for transmitting audio signals along the line. The circuit itself can be quite useful, although I personally prefer a PBX system with which I may taunt telemarketers with looping menus >:)
anonymous	Telephone Hold Button	Thursday, August 02, 2007 2:36:30 PM
This would seem to also work as a "Off Hook" or "Do Not Disturb" device. Just press the button to make your phone "off hook" without hearing a dial tone and alert tone. Just pick up a phone to reset it.
GRREG GRIFFITH	Telephone Hold Button	Friday, April 20, 2007 9:29:15 PM
IS THERE A WAY TO USE A WIRELESS PHONE BUTTON ARRAY TO PUT CALLERS ON HOLD WITH MUSIC AND LASTLY I WANT TO MAKE ONE MUSIC ON HOLD CIRCUIT FOR SEVERAL PHONES IN DIFFERENT LOCATION IN MY HOME
pat	Telephone Hold Button	Tuesday, March 13, 2007 5:20:00 PM
I'm going to make a hold button that when pressed plays the boring hold music of my choice from a tape recorder (I will have to rewind the tape each time I put someone on hold though)
vijaykumarv	good	Friday, March 02, 2007 2:52:37 AM
good