Patent ID: 6330235
Filing Date: 2001-12-11
Classification: H04L,H04M

Abstract:
A telecommunications system, comprising:a concentrator coupled between a host system and a first telephone line of a public switched telephone network (PSTN), the first telephone line coupling together the PSTN switch and a remote telephone, the concentrator coupled to the first telephone line between the PSTN switch and the remote telephone, said concentrator comprising:a multiplexer coupled to a plurality of telephone lines including the first telephone line;a plurality of modem channels coupled to the multiplexer;a network engine coupled to the plurality of modem channels and to the host system, the network engine converting data transferred between the modem channels and the host system; anda supervisor coupled to the PSTN switch through a second telephone line, to the network engine, to the plurality of modem channels and to the multiplexer, the supervisor controlling the multiplexer to couple the first telephone line to one of the plurality of modem channels in response to the PSTN switch;a remote modem coupled between a client system and the first telephone line such that data communications are established between the host system and the client system over at least a portion of the first telephone line through the concentrator and the remote modem, the data communications bypassing the PSTN switch; anda detection circuit coupled to the first telephone line, the data communications occurring between the host and client systems during an on-hook condition on the first telephone line detected by the detection circuit, the telecommunications system suspending the data communications between the host and client systems in response to an on-hook to off-hook transition on the first telephone line detected by the detection circuit.