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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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13th Jul 2020, 9:50 am | #1 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
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Telephone 710
I recently acquired the telephone 710 shown below. I currently have it wired as a stand-alone telephone, but I wonder what set-up would originally have included it.
Having picked through the rats' nest of wiring shown in the second image, I have identified the connections (apart from the red/green wire to T22) of the twelve-way line cord and attach a PDF showing them. The green and blue wires attached to T13 and T14 respectively are extended to the incoming A and B legs of the telephone line until the "exch" button is pressed, at which point they are disconnected.
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13th Jul 2020, 6:11 pm | #2 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
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Re: Telephone 710
I think it could be used for a few things, Dave, including plan-sets, but anything where several buttons (or lamps) were required.
I have a 710 as the living-room phone and mine has two buttons: one latching, one non-latching. I wired mine so the latching button is 'bell off' and the non-latching shorts the mic as a 'mute' button. The 'mute' button also unlatches the 'bell-off' button.
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13th Jul 2020, 7:11 pm | #3 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
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Re: Telephone 710
Perhaps I should have mentioned that the "exch" button is latching and gives access to the exchange line (while - as I mentioned in the attachment - disconnecting the forward connection of the line). The other three buttons are non-latching for signalling purposes.
I haven't made any changes to the internal wiring, merely strapping the "earthy" end of the bell circuit to the "A" leg in the block terminal.
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13th Jul 2020, 7:41 pm | #4 |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
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Re: Telephone 710
Yours has been different to mine. My buttons say '1' and 'Recall'. There is no buzzer. I acquired mine from a working situation, courtesy of BT, but I can only remember there being one other telephone on the same line.
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Regds, Russell W. B. G4YLI. |
13th Jul 2020, 7:58 pm | #5 |
Octode
Join Date: Aug 2005
Location: Saltburn-East, Cleveland, UK.
Posts: 1,786
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Re: Telephone 710
Hi, your phone is most likely from a Telephone Rentals Plan system, of which there were many.
Although it looks like a GPO 710 does it have that particular number stamped on the base or is it (more likely) an Ericsson N1906 variant? Gec also made a few Plan systems, the most similar one I can find to your phone is shown here Regards Andrew |
13th Jul 2020, 8:39 pm | #6 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
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Re: Telephone 710
Yes, definitely a 710F.
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Mending is better than Ending (cf Brave New World by Aldous Huxley) |