UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Telephony and Telecomms

Notices

Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment

Reply
 
Thread Tools
Old 27th Jul 2019, 2:01 pm   #1
keithinuk
Pentode
 
Join Date: Mar 2011
Location: Hertfordshire, UK.
Posts: 208
Default 710 chief phone with buttons

I picked up this phone and bell box the other day, it's nothing too exciting, but I thought it might be interesting.
Attached Thumbnails
Click image for larger version

Name:	IMG_9528.jpg
Views:	109
Size:	59.7 KB
ID:	187418   Click image for larger version

Name:	IMG_9530.jpg
Views:	92
Size:	67.9 KB
ID:	187419   Click image for larger version

Name:	IMG_9531.jpg
Views:	82
Size:	68.5 KB
ID:	187420   Click image for larger version

Name:	IMG_9532.jpg
Views:	78
Size:	46.2 KB
ID:	187421  
keithinuk is offline   Reply With Quote
Old 27th Jul 2019, 2:22 pm   #2
Pellseinydd
Hexode
 
Join Date: Jul 2007
Location: Flintshire, UK.
Posts: 460
Default Re: 746 chief phone with buttons

It is actually a 710 style rather than the later 746 style phone. Part of the Plessey range of phones for private systems or export - the 'main' station of a manager/secretary setup giving similar arrangements to the GPO's Plan 105/107. See https://britishtelephones.com/ericsson/n1906.htm for more about it.

Telephone Rentals bought most of their range of telephones and PAXes from Ericssons/Plessey and stuck their own labels on them.

Ian J
ex Plessey Communication Systems
Pellseinydd is offline   Reply With Quote
Old 28th Jul 2019, 7:42 pm   #3
AndiiT
Octode
 
AndiiT's Avatar
 
Join Date: Aug 2005
Location: Saltburn-East, Cleveland, UK.
Posts: 1,624
Default Re: 710 chief phone with buttons

Hi, if the fourth (far most right hand) button is marked 'Trans Rlse' this particular model of phone and its associated extension was intended for use only with a PAX and was produced by Ericsson/Plessey and distributed by Telephone Rentals and (possibly) other private rental firms.

I had a brochure somewhere with details of a number of these systems, unfortunately I have mislaid it

Regards

Andrew
AndiiT is offline   Reply With Quote
Old 29th Jul 2019, 1:02 am   #4
rambo1152
Octode
 
rambo1152's Avatar
 
Join Date: May 2010
Location: Manchester, UK.
Posts: 1,517
Default Re: 710 chief phone with buttons

I am intrigued to know what "Trans Rise" means.
__________________
--
Graham.
G3ZVT
rambo1152 is online now   Reply With Quote
Old 29th Jul 2019, 2:44 pm   #5
Riccardo Grillo
Triode
 
Join Date: Jul 2019
Location: Colchester, Essex, UK.
Posts: 15
Default Re: 710 chief phone with buttons

Oh, I think it's exciting.

Although from what I can make out, it's not actually GPO equipment and, as such not actually a 710, it seems to have the all-figured dial surround correct for the 706 and associated variants. From my limited experience, I would suggest these are not that common as most phones were upgraded to clear dials with numbered backing ring and a plain outer surround.

My green 706F was later upgraded to a 706F as above but would presumably have had a dial surround fairly similar to yours when it left the factory the first time around. Yours was never upgraded, so it's a reasonably interesting example of an all-figured dial surround.

From what I can gather there is a kind of all-figured dial surround that was issued later for the 747 and associated varieties, but the numbers are much larger. Practical, and not unattractive, but not contemporary.
Riccardo Grillo is offline   Reply With Quote
Old 29th Jul 2019, 8:25 pm   #6
keithinuk
Pentode
 
Join Date: Mar 2011
Location: Hertfordshire, UK.
Posts: 208
Default Re: 710 chief phone with buttons

Quote:
Originally Posted by rambo1152 View Post
I am intrigued to know what "Trans Rise" means.
It actually says TRANS RLSE, four buttons, SECY, LINE, TRANS, TRANS RLSE.
Attached Thumbnails
Click image for larger version

Name:	IMG_9536.jpg
Views:	25
Size:	105.3 KB
ID:	187559   Click image for larger version

Name:	IMG_9537.jpg
Views:	26
Size:	77.5 KB
ID:	187560  
keithinuk is offline   Reply With Quote
Old 29th Jul 2019, 8:47 pm   #7
Dave Moll
Dekatron
 
Dave Moll's Avatar
 
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 4,224
Default Re: 710 chief phone with buttons

That certainly makes more sense, so they are respectively "secretary", "line", "transfer (call to other extension)" and "release transfer" - the equivalents on a planset 105/107 being "speak to extension", "speak to exchange", "extension to exchange" and "release".
__________________
Mending is better than Ending (cf Brave New World by Aldous Huxley)
Dave Moll is offline   Reply With Quote
Old 29th Jul 2019, 10:53 pm   #8
AndiiT
Octode
 
AndiiT's Avatar
 
Join Date: Aug 2005
Location: Saltburn-East, Cleveland, UK.
Posts: 1,624
Default Re: 710 chief phone with buttons

Quote:
Originally Posted by Dave Moll View Post
...so they are respectively "secretary", "line", "transfer (call to other extension)" and "release transfer" - the equivalents on a planset 105/107 being "speak to extension", "speak to exchange", "extension to exchange" and "release".
Although that would seem the case having one of these phones in my collection and doing some extensive examination of the circuit then wiring a "non standard" extension phone to it the buttons act as follows -

Secy is a latching button which connects the intercom battery/circuit and operates the buzzer in the secretary's instrument, the buzzer in that phone being silenced by an additional gravity switch when the handset is lifted.

Line (or Exch on the 740 version of this phone) does what it says on the tin and connects the Chief phone to, in this case, the PAX line.
I think that the strapping can also be arranged to disconnect the secretary's line access to prevent overhearing if desired.

Trans and Trans rlse are nothing more than a bell transfer switch, when the trans button is operated the bell circuit is disconnected in the chief instrument and "transfers" the bell circuit to an additional bell associated with the secretary's phone - The secretary phone had the option of two lines one exclusive and one shared with the chief.

There is a relay which operates a lamp on both phones to alert an incoming call at any time and particularly when an intercom call is in progress.

The trans rlse button is no more than a latch release for the transfer button

The diagram for the chief instrument can be found here and the secretary instrument here


Regards

Andrew
AndiiT is offline   Reply With Quote
Old 30th Jul 2019, 1:28 pm   #9
keithinuk
Pentode
 
Join Date: Mar 2011
Location: Hertfordshire, UK.
Posts: 208
Default Re: 710 chief phone with buttons

I have it inside the bellbox.
Attached Thumbnails
Click image for larger version

Name:	IMG_9540.jpg
Views:	39
Size:	67.0 KB
ID:	187588  
keithinuk is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 6:23 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright ©2002 - 2019, Paul Stenning.