HC Deb 28 April 1927 vol 205 c1018
56. Lieut.-Colonel ACLAND-TROYTE

asked the Postmaster-General whether he is aware that it is of importance to firms having private telephone exchanges to ensure that confidential communications are not overhead by tapping at the switch-board; why he will only allow firms to employ a device for preventing tapping at the switch-board on one of their lines; and whether he will relax this rule in future?

Viscount WOLMER

Owing to technical difficulties, it has hitherto been necessary to restrict the arrangement for cutting out the private exchange to one extension instrument. A new arrangement, which will allow of secrecy on all lines at the private exchange, is, however, under consideration.