LOUDSPEAKING TELEPHONE No. 11
The LST No. 11A, sales name Facilityphone 200, is a press button electronic table top telephone offering numerous facilities which include:-
The telephone contains six rechargeable batteries capable of retaining the memory and
powering the electronic dial circuit for approximately 48 hours should the mains supply
fail. The battery is automatically recharged by a Plug Top transformer when the mains
supply is reconnected. Only calls to and from the telephone handset are possible, during
power failure. Should the battery also fail, it will then only be possible to receive
incoming calls and the memory store may corrupt.
Sales Catalogue - CP/MS187
The LST No. 11A is suitable for use on Phone Socket installations on DELs and most types of
PBX/CCS two wire extensions. Not suitable for use on "C" wire PMBXs or WB 900.
BT then held a number of LST No. 11A's in central depots for maintenance use due to the following situations:-
When setting the time clock, timing starts on the release of the RS button.
The user must change the rechargeable batteries every three years and the Silver Oxide batteries every two years, if fitted.
PARTS DESCRIPTION BT PART No Loudspeaking Telephone 11A Stone 411168 Plug Top Transformer. (FF200) 877618
Last revised: April 29, 2023