LOUDSPEAKING TELEPHONE No. 12
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. Later units, marked LST 12A/1, were supplied complete with transformer.
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 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).
PARTS DESCRIPTION BT ITEM CODE Loudspeaking Telephone 12A Stone 870080 (without transformer) Transformer 17C 870079 Loudspeaking Telephone 12A/1 Stone 870235 (complete with transformer)
To answer an incoming call, just press the 'ON/OFF' button and speak when the light comes on. To end the call, press the 'ON/OFF' button. The light will go out. During calls, adjust the loudspeaker volume control as necessary.
Changing from handset to handsfree
Changing from handsfree to handset
Note - If you have pressed the 'S' button, this is automatically cancelled and the light goes out as the handset is raised.
The 'S' button (Microphone Mute)
Last Number Redial
The following features may only be used if Easikom is on a PABX extension.
To recall the operator Press the 'R' button.
To insert a pause Press 'PS' button. Each time you press the 'PS' button a 3 second pause is inserted.
The * and # keys - Please see your Switchboard User Guide.
Last revised: February 26, 2021