Wren House: Operating Procedures - Part 1
Operating Procedures - Part 1
Opposite is a typical continental/intercontinental board layout. Far left of photo the Visible Index File (VIF).




Photo: Switchboard keyshelf and jackfield © Light Straw Archive.
| EXIT | Switchboard Details | Keysender |

Keyshelf and Jackfields

Jackfield L to R: Various jack multiples, 20 way strips. Jackfields with supervisory lamps. Telephone tickets, white header cards, yellow delay cards.
Keyshelf and Jackfields
Keyshelf - This has a Formica finish unlike the earlier boards which had a red fabric covering. It's likely that the switchboard had been refurbished, such was the longevity of the cord boards!

 



 Photo: Switchboard keyshelf and jackfield © Light Straw Archive.
Keyshelf- left to right and back to front: Visible Index File (VIF); Plugfield, 2 rows of 8 plugs; Dial for dialling into local exchanges. Supervisory lamps, 1 for each connection circuit. 8 Lever keys, speaking, listening, holding; ticket well; Keysender, 12 white buttons for signalling over international circuits. 6 associated call timers. 6 ticket clips.

Keysender
12 white keysender buttons
As well as a normal dial, the international boards were equipped with a 12 button keysender, 0 to 9 plus Code 11 and Code 12, as well as 3 red function keys.




Photo: Switchboard keyshelf © Light Straw Archive.
   

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Page last updated 21st July 2012.Checked May 2021.

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