TERMINAL-STATION TELEPHONE FOR TRUNK LINE WORK No. 321
Similar to Telephone
320, but fitted with a 2,000 ohm bell shunted across the line, and a generator with
five magnets, No. 482.
Specially used where several instruments are connected in parallel oil the same line, and all of them have to be called simultaneously when a signal is given.
Weight 20.5 lbs. Price £4 17s.
Taken from the Ericsson Telephone Catalogue 1903
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