Dual talk path key telephone
AssigneeIPC Communications, Ltd.
InventorsHenry M. Bergen, Sedat Zaimi, Vincenzo Castellano, Irwin Schildkraut
Life of this patent
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Abstract
In a multiple talk path key telephone of the type of having multiple handsets, each handset is coupled to the key field for a predetermined short period of time when it is initially taken "off hook". During this predetermined time period a user can depress a key and connect with a desired telephone line. If the user has the handset "off hook" and desires to connect to another telephone line, he merely depresses an access key and the handset is again reconnected to the key field for the predetermined time period. The present invention eliminates the possibility of one user disconnecting another user's telephone line during a telephone conversation.
Claims3
In a multi-line key telephone system the combination of:
- a key field including a plurality of non-locking pushbutton keys for selected line connections;
- at least two independent audio terminations;
- means for coupling said key field to control line selection for a particular audio termination only for a predetermined interval after a new line request therefor;
- and
- switching means for coupling said audio terminations to a selected line if selected during said predetermined interval following a new line request.
Dependencies are inferred from the claim text.