LST 12A, sales name Easikom, is a press-button loudspeaking telephone offering only basic
facilities i.e.: last number redial and microphone mute when in the loudspeaking mode. The
telephone may be used as a table top instrument or wall mounted without the need for
additional brackets or modifications. Three AA size batteries are supplied with the
telephone and should be fitted at all times as they assist to power the keypad and repeat
last number facility, without them wrong number problems may occur.
LST 12A's were originally supplied without the Transformer 17C which needed to be ordered
separately when required. Recent units, marked LST 12A/1, are supplied complete with
When the telephone is used on average length lines the switch at the rear of the telephone
can be set to "TEL LINE" and all facilities will be provided without the use of
the transformer. When used on long lines or the extension of a modern call connect system
with constant current transmission feeds the Transformer 17C may be required. In these
cases the switch should be set to "AC Adapter" and the transformer connected to
the socket provided. This improves both the transmission and the MF4 signalling capability
of the telephone.
Made by Panasonic Limited
The LST 12A is now supplied to customers on rental terms only.
Approval Number S/1000/3/D/021 821
Approved as supplied for connection to the BT telephone system.
Early versions of the LST 12A (below serial No 02101) are only approved for
Later models are approved for both 10 pps and MF4 use.
A 240 Volt, 13 Amp, 50 Hertz supply is required when using the Transformer 17C.
The LST 12A is suitable for use on Phone Socket installations on DELs or PBXs with 10 pps
pulsing or MF4 signalling and Earth loop recall facility. (when supplied the telephone is
set for l0 pps use. To convert to MF4 signalling open the telephone case and operate the
slide switch accessed via the slot in the centre of the keypad PCB).
The Easikom l has a REN of 1.5
The customer must replace the batteries when the LED above the ON/OFF switch flashes when
making or answering calls.
Superseded by React 320
DESCRIPTION BT ITEM CODE
Loudspeaking Telephone 12A Stone 870080
Transformer 17C 870079
Loudspeaking Telephone 12A/1 Stone 870235
(complete with transformer)