A telephone call-diverter system for interconnecting an incoming telephone line to an outgoing telephone line so that an incoming telephone call can be transferred to a predetermined remote telephone station. A DC conducting channel is established between the call-diverter system and the incoming telephone line subsequent to the detection of the incoming telephone call, the transmission of dialing signals from the call-diverter system over the outgoing telephone line and a remote station answer condition provided on the outgoing telephone line. In one embodiment, a voice frequency transmission channel is provided in the incoming telephone line connection so that voice frequency communication between the incoming and outgoing telephone lines is provided independent of the completion of the DC connection. Hence, voice frequency signals can be communicated even before the DC connection is established.