| 摘要 |
<p>A telephone lock (10) for preventing the plug of a telephone from being inserted into a corresponding line jack unit comprises a locking means (23) including a shank member (13) of a suitable length and size to be accommodated in the socket of a line jack unit in substitution for a telephone plug proper. The shank member (13) has a movable locking member (25) mounted thereon which is arranged to be in use moved by the locking means (23) to engage a part of the line jack unit socket to prevent removal of the telephone lock from the line jack unit. <IMAGE></p> |
