专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2000349730A MULTIPLEX EXTENSION UNIT 失效
公开(公告)号：JP2000349730A
公开(公告)日：2000-12-15
申请号：JP15596399
申请日：1999-06-03
申请人： FUJITSU DENSO
发明人： KAKI HIROKI
IPC分类号： H04J3/26
摘要： PROBLEM TO BE SOLVED: To allow a master station side multiplex extension unit to optionally set or revise assignment of a multiplexed channel to a slave station side channel with respect to the multiplex extension unit that multiplexes a plurality of channels of the master station side and simply extends the result to the remote slave station side. SOLUTION: A master station side multiplex extension unit 1-1 multiplexes master station side channels A, B, C that are an extension source into a multiplexed channel 1-2, transmits the result and transfers multiplex information denoting assignment to the multiplexed channel 1-2 to a slave station side multiplex extension unit 1-3 being an extension destination by using part or an overhead part of the multiplexed channel 1-2. The slave station side multiplex extension unit 1-3 being an extension destination has a configuration that demultiplexes the multiplexed channel 1-2 and assigns each time slot of the multiplexed channel 1-2 to each of slave station side channels A', B', C' on the basis of the transferred multiplex information.

2. 发明专利

JPH0955759A MULTI-STATION COMMUNICATION DEVICE USING RING TRANSMISSION LINE 失效
公开(公告)号：JPH0955759A
公开(公告)日：1997-02-25
申请号：JP20629295
申请日：1995-08-11
申请人： FUJITSU DENSO
发明人： ARAI TOMOHARU , KAKI HIROKI
IPC分类号： H04L12/437
摘要： PROBLEM TO BE SOLVED: To actualize nearly the same signal transmission state as an ordinary state by incorporating a means which sends a signal indicating a sent signal break in a monitor means and a means which sends out an emergency signal in a transmitting means. SOLUTION: A means 14 which takes a local-station arrival channel signal from a stand-by transmission line 22 when detecting a break of a sent signal or characteristic deterioration of a transmission line and the means 15 which informs a transmitting means 12 of a signal indicating the break of the sent signal are incorporated in the monitor means 14 for the sent signal, and the means 16 which sends the emergency signal to all channels except the local- station arrival channel is incorporated in the transmitting means 12. If the transmission line or device gets out order on a ring-shaped in-use transmission line 21, respective stations informed of that are switched to reception from a stand-by transmission line 22. Therefore, a normal communication wherein the transmission of signals is not delayed is always maintained.

你已经成功收藏专利！

检索式保存成功!

IPRDB