公开(公告)号：FR2721782B1

公开(公告)日：1997-10-03

申请号：FR9506155

申请日：1995-05-19

Applicant: IBM

Inventor： BOGGS ANDREW KENNETH ,  HOANG QUY N ,  JACOBS JOE ,  MULLEN JOHN MARK ,  PURRINGTON CHALLIS ,  WEAVER LAURA A

IPC: H04L12/433 ,  H04L29/00 ,  H04L29/08 ,  H04L29/06 ,  H04L12/24

Abstract: An intelligent multistation access unit is provided having a transmission speed detection circuit for determining the data transmission speed of an attached device attempting to gain access to a node of a multiple transmission rate digital data communications network. The intelligent multistation access unit is comprised of a speed detect circuit, which indicates the data transmission speed of the attached device, a switching circuit which directs the attached device to the speed detect circuit until switched to allow the attached device access to the network node, and a processor that controls the switching circuit and which permits the attached device access to the node depending on the data transmission speed indication.