Telephone station set interface circuit

Details Telephone station set interface circuit Telephone station set interface circuit

H - Electricity

04

M

379/33, 379/73

H04M 1/72 (2006.01) H04M 3/42 (2006.01) H04M 3/56 (2006.01) H04M 9/00 (2006.01)

Patent

CA 1089134

TELEPHONE STATION SET INTERFACE CIRCUIT Abstract of the Disclosure A telephone station set interface circuit is disclosed which enables a conventional nonkey telephone station set to be used in place of an electronic key telephone station set for those subscribers in an electronic business communication system requiring only a call origination and a call reception capability. The interface circuit receives control data signals from a key telephone switching system over a data link independent of a speech path and, depending on the hook switch status of the nonkey telephone, a relay in the interface circuit either blocks or retransmits the control signals to the switching system on the data link to indicate the idle or busy status of the telephone.

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