Keyboard security for a telephone attendant set.

摘要

An attendant console for use with an electronic private automatic branch exchange (EPABX) includes a jack (21) for removably connecting an attendant headset or handset (20) to the console. A switch array (11) in the console provides indications of attendant control action and logic circuitry (10) connected to the switch array registers the indications. Gates (23, 24) are connected in series with the switch array for prevening registration of the indications in response to the attendant set being disconnected, such that control actions as may be indicated at the switch array while the attendant is away from the console are of no consequence.