TXE2 - Info Sources

1965 Pentex - A small electronic exchange

A 38 Page pdf available at http://www.samhallas.co.uk/repository/documents/pentex_exchange.pdf

1969 POEEJ Vol 62 Part 1

Electronic Telephone Exchanges: TXE2-A Small Electronic Exchange System Page 12-20

Can be obtained from

http://www.samhallas.co.uk/repository/journals/POEEJ/POEEJ%20Vol%2062%20Pt%201%20April%201969.pdf

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