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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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22nd Aug 2021, 12:56 am | #1 |
Heptode
Join Date: Aug 2009
Location: Worthing, Sussex, UK.
Posts: 662
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Using the Door Opener interface on a panasonic KX-T308 telephone exchange
The Panasonic KX-T308 telephone has an RJ11 socket for connecting a door opener.
Using the standard colour codes for an RJ11 lead this gives.... Door opener interface Black + 12 Volts Red - Door 1 Green - Door 2 Yellow - GND Door 1,2 0 volts door locked, 5 volts for door unlock Easiest way is to use a drive transistor with base resitor to the signal driving a relay which must have a protection diode. Dialing the codes 551 or 552 result in a unlock (5 Volts) for 5 seconds. Note this has to be enabled first under programming to be enabled for each phone. these codes could be entered from any pulse/tone telephone or even a computer via a modem. Of course this could be used to control any external equipment. Ideas as to what would be intersting. |
22nd Aug 2021, 11:03 am | #2 |
Heptode
Join Date: Apr 2011
Location: Edinburgh, UK.
Posts: 805
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Re: Using the Door Opener interface on a panasonic KX-T308 telephone exchange
I think it would be very civilised being able to phone from the bedroom and initiate the kettle for early morning tea.
Or step up/down through the channels on a radio feeding a pantry transmitter. |
22nd Aug 2021, 2:13 pm | #3 |
Guest
Posts: n/a
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Re: Using the Door Opener interface on a panasonic KX-T308 telephone exchange
A cat food deliverer, that would save our feet being clawed and chewed during a weekend lie-in. Well my feet anyway, I am tall enough for them to stick out of the end of the bed, that wouldn't stop the "while you are feeding the cats a cuppa would be nice".
Solved, ring the butlers bell! |
22nd Aug 2021, 2:51 pm | #4 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,725
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Re: Using the Door Opener interface on a panasonic KX-T308 telephone exchange
I used to maintain those KXT 308 systems I probably wired some door openers.
My Raspberry Pi Asterisk PABX has 10 relays connected to the GPIO pins using one of these cheap Chinese boards. A further two pins can be used for doorbells or alarm inputs It was an interesting exercise when I did it in 2017 but although the code is still in place on my system I have not found a use for it other than its own novelty.
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5th Sep 2021, 7:59 pm | #5 |
Hexode
Join Date: May 2005
Location: London 90% , Northwest England 10%
Posts: 386
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Re: Using the Door Opener interface on a panasonic KX-T308 telephone exchange
Seeing the Lookmumnocomputer You Tube video channel , controlling the on off of a teletubbie toy seems one use.
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12th Sep 2021, 11:35 pm | #6 | |
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Re: Using the Door Opener interface on a panasonic KX-T308 telephone exchange
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