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Page 1: 10 Line Telephone Intercom Exchange
Page 2: 10 Line Telephone Intercom Exchange
Page 3: 10 Line Telephone Intercom Exchange
Page 4: 10 Line Telephone Intercom Exchange
Page 5: 10 Line Telephone Intercom Exchange
Page 6: 10 Line Telephone Intercom Exchange

Several small errors, for which we apologise,

crept into this article in the August issue.

Firstly, the open contact of A1 on p. 42 should

go to the open contact of D2, not the junction of

FC2 and the 470ohm resistor. Secondly, the make

contact connected to the closed contact of D2 is

FC1 not FC2. Lastly, in Table 2 on p. 45, the

relays operated on called-line 2 are SB and HB.

Source:

MINIATURE TEN-LINE TELEPHONE EXCHANGEL. D. GUNNWIRELESS WORLD AUGUST 1980 pp. 41 et seq.© IPC BUSINESS PRESS LTD 1980ISSN 0043 6062


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