发明名称 |
ATM switching system. |
摘要 |
<p>In the ATM switching system, an ATM speech path is divided into a plurality of functional blocks (101 - 10n, 120; 130, 110). A routing function for distributing cells (packets) each of a fixed length to address outgoing lines and a logical multiplexing function are imparted to a switch (110), while other functions associated with a line typified by a phase synchronizing function and a flow control function are incorporated en bloc in ATM line terminating units (101, 10n) and functions capable of being processed by hardware in common to the lines are assembled in a line common unit (120, 130). The ATM line terminating unit physically terminates transmission lines and performs the processing relevant to header information of the cells each of a fixed length (ATM terminating processing) and includes a cell phase synchronizing circuit (202) for matching the temporal positions of the cells among the lines and a flow control circuit (205) for avoiding overload exceeding the load declared by subscriber terminal. The line common unit serves for processings of call control signals and the calls and includes a signal processing circuit (120) and a control circuit (130). The switch performs cell multiplexing and switching and is constituted by a self-routing switch.</p> |
申请公布号 |
EP0351818(A2) |
申请公布日期 |
1990.01.24 |
申请号 |
EP19890113239 |
申请日期 |
1989.07.19 |
申请人 |
HITACHI, LTD. |
发明人 |
TORII, YUTAKA HITACHI FUKIAGERYO 327;MORI, MAKOTO 52-1-601, NASECHO;GOHARA, SHINOBU;OHTSUKI, KENICHI;SAKURAI, YOSHITO |
分类号 |
H04L12/70;H04L12/931;H04L12/933;H04L12/935;H04L12/937 |
主分类号 |
H04L12/70 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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