|Telephone 9501 (early version)
"basic" Viscount telephones comprised:- Telephones 9501, 9501R, 9511R, 9601R and
50v working, 10 pps signalling. Early versions fitted with a 10 button keypad. Later
versions have a 12 button keypad but the two extra buttons (either side of the 0 button)
serve no purpose. Available in beige, green, ice grey and tan
As for Tele 9501 but with earth recall.
Tele 9511R (New Standard Viscount)
50v working, 10 pps signalling with earth recall. 12 button keypad offering last number
redial, scratchpad and transmission cut-off facilities. The scratchpad facility enables
users to change the number held in the last number redial memory whilst call in progress.
PABX access pause not provided, therefore access digit(s) must be keyed before pressing
the `MR' button. The telephone will then pulse the remaining (exchange line) digits to,
telephone with 12 memory store (shown right). Functionality also included
notepad, earth recall, mute and last number redial. Available in beige and
ice grey colours.
50v working, 12 button, MF4 signalling keypad with earth recall.
As for Tele 9601R but can be converted to provide timed-break recall.
Incoming calls are signalled by a tone caller that has an adjustable volume control
beneath the right hand side of the instrument.
Made by STC Telecommunications Ltd
Telephones 9501, 9511 and 9601 each have a Ringer Equivalence Number (REN) of 1. Telephone
instruments (BT and non BT supplied) are now required to be labelled with their REN so
that users do not exceed the permitted maximum number of ringers in circuit.
A telephone with a REN of 1 has a ringer sensitivity similar to that of a standard
instrument (Tele 8746G), the total REN value of all ringers connected at any time at an
installation must not exceed 4.
The REN does not guarantee compatibility between ringers of different technologies on the
Telephones 9501, 9511 and 9601 are 50 volt line powered instruments and require no external
power supplies. The Tele 9511 last number re-dial facility constantly draws approximately
25 ma from line to maintain the memory, if the instrument is disconnected from line for
more than a few minutes the memory will be erased.