Patent ID: 7724883
Filing Date: 2010-05-25
Classification: H04M

Abstract:
1. A telephone system communicating though a plurality of external telephone lines, comprising: a plurality of single-line telephone base units, each telephone base unit having a telephone circuit providing telephone functions including establishing connection with a respective telephone line and producing ringing sounds in response to a calling request, and having a line jack for plugging in a respective said telephone line; and a communication path for connecting said plurality of telephone base units so as to allow communication between them, each telephone base unit having a connector, that is separate from the line jack, for connection to the communication path; wherein each of said plurality of single-line telephone base units further includes a multiple-line adaptation unit for communicating with at least one other of said multiple-line adaptation units over said communication path in order to establish communication though said plurality of telephone lines, and a single-line adaptation unit for establishing communication though said telephone line connected to the terminal itself, without using said communication path, and wherein a single-line telephone base unit of said plurality of single-line telephone base units selectively performing one of: