BT MINIMASTER 2

The Minimaster 2 is a microprocessor controlled switching system with a capacity of 1 exchange line and 5 extensions.  The extension instruments may be any standard loop disconnect telephone, with the exception of the Statesman and Rhapsody types.  Telephones are connected by two wires to the CCU.  A separate extension bell may be fitted.

The system is not suitable for connection to a PBX where recall is required.

Introduced around 1983.

Superseded by Minimaster 3.

Installation

The code switch on the rear of the CCU must have all three switches set to on for extn 5 to work.

Terminal Block connection
Aa - 1 - Exchange line a
Ab - 2 - Exchange line b
W1 - 3 - Extn bell a
W - 4 - Extn bell b
a1 - 5 - Extn 1
b1 - 6 - Extn 1
a2 - 7 - Extn 2
b2 - 8 - Extn 2
a3 - 9 - Extn 3
b3 - 10 - Extn 3
a4 - 11 - Extn 4
b4 - 12 - Extn 4
a5 - 13 - Extn 5
b5 - 14 - Extn 5
TS - 15 - spare
TS1 - 16 - spare
TO - 17 - spare
TO1 - 18 - spare

TWO NEW wall-mounted small switching systems are being introduced this year. The systems - the Minimaster 1 (1 + 6) and Minimaster 2 (1 + 5) - are aimed at small business customers but the choice of extension telephones will make the systems attractive to residential customers as well. As a first step into these markets, contracts have been placed with two manufacturers for the different versions of Minimaster. The systems are similar in design, comprising a mains-powered central control unit to which extensions are individually connected. Minimaster 1 is currently being trailed in Tunbridge Wells telephone area and Minimaster 2 is shortly to undergo trials in Southend area.

Taken from BT Management News - April 1983

PARTS LIST

Last revised: November 23, 2021