Abstract: A time slot multiplex device for a time division multiplex system having a voice memory for storing data words received on an input multiplex line, and a control memory for controlling the reading of said voice memory to an output multiplex line, incorporates logic circuitry for generating a plurality of associated pairs of addresses, one for said control memory and one for said voice memory, corresponding to a plurality of equally spaced time slots for a multi-channel connection to said output multiplex line of relatively high band width, in response to a single pair of associated addresses furnished by a higher ranking control means and a logic circuit which, in association with a time slot counter, generates the required addresses during cycling of the time slot counter through a single frame of the time division multiplex system.