Patent ID: 6542599
Filing Date: 2003-04-01
Classification: H04M

Abstract:
A subscriber system transmission apparatus with a line concentrating capability, having a remote terminal connected to a subscriber's terminal and a central terminal to an exchange, said remote terminal being connected to said central terminal in series, comprising:remote terminal line concentrating and connecting means disposed in said remote terminal, for effecting a line concentrating process on a call from the subscriber's terminal to assign the call to a trunk transmission line; bypassing means disposed in said remote terminal, for bypassing said remote terminal line concentrating and connecting means to connect a call from the subscriber's terminal directly to the trunk transmission line; mode selecting means disposed in said remote terminal, for selecting a mode of operation of said remote terminal line concentrating and connecting means when said remote terminal line concentrating and connecting means operates normally and selecting a mode of operation of said bypassing means when said remote terminal line concentrating and connecting means suffers a fault; central terminal line concentrating and connecting means disposed in said central terminal, for effecting a line concentrating process on a call from said remote terminal to assign the call to an exchange transmission line; and selecting means for sending a call from said remote terminal to the exchange transmission line when said remote terminal line concentrating and connecting means operates normally and operating said central terminal line concentrating and connecting means when said remote terminal line concentrating and connecting means suffers a fault.