Title:
MULTIPLEXING DEVICE
Document Type and Number:
Japanese Patent JP3952676
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To report alarm information for each terminal to a network node device, when multiplexing data from a plurality of terminals and transmitting the data to a leased line connected to predetermined network.
SOLUTION: An input conversion section 10 terminates data from each terminal for detecting its pulling out of synchronism or data error and generates its alarm bit. An alarm selector circuit 14 selects a corresponding alarm bit, in response of data selected by a data selector circuit 12. The selected corresponding data and the alarm bit are written into the same address as in a buffer memory 16, and are further read simultaneously. The alarm bit is converted into an alarm signal that can be identified in a network side, including the type of its terminal by an alarm conversion table 206. The alarm signal is inserted into the status byte of a frame, corresponding to each terminal of the transmission frame in a multi-frame configuration by a frame generating circuit 226 and is notified to the network.
Inventors:
Yoshihiro Kikukawa
Kenji Takahashi
Kenji Takahashi
Application Number:
JP2000275802A
Publication Date:
August 01, 2007
Filing Date:
September 12, 2000
Export Citation:
Assignee:
Yokogawa Electric Corporation
International Classes:
H04J3/14; H04L69/40; (IPC1-7): H04J3/14; H04L29/14
Domestic Patent References:
| JP9116514A | ||||
| JP2000209337A | ||||
| JP5244203A | ||||
| JP8161201A | ||||
| JP4263530A | ||||
| JP63001225A |
Attorney, Agent or Firm:
Anami Kensaku
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