Showing papers on "High-bit-rate digital subscriber line published in 1985"

Integrated services telecommunications system for narrow band services

Abstract: In a narrow-band ISDN with subscriber stations connected to an exchange via optical waveguide lines, in each case a number of subscriber stations are connected in each case via their own optical waveguide subscriber line to a common optical branching element which is connected via an optical waveguide line specific to the branching element, to a multiplex line circuit of the exchange. The signal transmission from the exchange is effected in an ISDN basic interface multiplex frame; the signal transmission from the subscriber stations is effected in each case in the time channel allotted to the particular subscriber station in bursts of defined length and time slot.

Method and circuit arrangement for establishing connections and transmitting communication signals between subscriber's stations or line groups in a communications exchange, in particular a data exchange, having a loop arrangement

Abstract: The connection between two subscriber stations or line groups (TG1...TGm) in a communications exchange, in which the individual subscriber stations or line groups (TG1...TGm) are connected together with computers (SB1...SBn) via a loop arrangement (BUS 0, BUS 1), is established by employing two computers in each case, one of which manages or operates the calling subscriber station or line group, while the other computer manages or operates the respective called subscriber station or line group. Communication signals are transmitted between the subscriber stations or line groups involved in a connection only via one of the computers previously used. … …