Title:
LOOP-TYPE DATA TRANSMISSION DEVICE
Document Type and Number:
Japanese Patent JP3569613
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To simplify constitution and to improve the use efficiency of a line even by a low speed signal by accessing to the multiplex frame signal of an SDH system, selectively extracting a signal from a time slot, demultiplexing it, sending it to a terminal equipment, selectively arranging it to a prescribed time slot, multiplexing it and sending it to a transmission line.
SOLUTION: The signal from the terminal equipment 3 connected to a node device (N1) 2 is converted into a parallel signal by a line interface part 25 in the node device 2 and it is outputted to a demultiplexing bus 26 at timing that a multiplex/demultiplex part 24 controls. The multiplex/demultiplex part 24 holds data outputted to the demultiplexing bus 26 for prescribed time and arranges data and additional information in a time slot on a payload. SOH is added to the multiplexed signal in an STM-1 terminal part 22, is converted into an optical signal and is transmitted to a downstream node device 2.
Inventors:
Toshio Nakatani
Application Number:
JP26571797A
Publication Date:
September 22, 2004
Filing Date:
September 30, 1997
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04B10/556; H04B3/46; H04B10/079; H04B10/275; H04B10/291; H04J3/00; H04L12/42; H04L12/43; (IPC1-7): H04L12/42; H04B3/46; H04B10/00; H04J3/00
Domestic Patent References:
| JP8079288A | ||||
| JP8008943A |
Attorney, Agent or Firm:
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami