CIRCUIT AND APPARATUS FOR BRIDGING AND MONITORING

专利名称：CIRCUIT AND APPARATUS FOR BRIDGING

AND MONITORING

发明人：MC NULTY H,US,OATIS M,US申请号：US3786198D申请日：19720217公开号：US3786198A公开日：19740115

摘要：A telephone bridging apparatus which can be utilized with telephoneswitchboards such as those provided by an answering service. The apparatus in partcomprises an insertable module in the switchboard, having internal connections andappropriate switching functions for either a single or a double cord switchboard. Themodule has circuitry which operates cooperatively with a monitoring circuit and theremainder of the apparatus for utilization with either a double or single cord switchboardand comprises in part an audio alert as well as a visual alert to help monitor a call.

申请人：TEL EQUIPMENT CORP,US

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