Title:
DATA SET
Document Type and Number:
Japanese Patent JPS5794897
Kind Code:
A
Abstract:
A voiceband data set network includes a control data set (10), a plurality of tributary data sets (4a, 4b . . . 4n) and a diagnostic control device (5). User-provided data is communicated between the control data set and the tributary data sets via a primary channel within a four-wire private telephone line (11, 12). Diagnostic and control information is communicated between the control data set and the tributaries via a secondary channel within the private line. Diagnostic and control information is communicated between the diagnostic control device and the control data set, with which it is co-located, via a control channel. Each data set includes a data set diagnostic unit (50), or DDU, via which it transmits and receives the diagnostic and control information. Communications among the DCD, DDUs, and primary controllers within the data sets, are carried out on a link-by-link basis, with the DDUs serving as message switching nodes and with communications over each link being principally comprised of requests and reads. The DCD, DDUs and primary controllers communicate in a hierarchy in which requests and reads are always directed downstream. The tributary data sets are provided, however, with a way of directing request-type message texts upstream.
Inventors:
YONNEON HENRII WAN
SUTEBUAN JIYON ZAIYAA
BONII AN ZUIMAA
SUTEBUAN JIYON ZAIYAA
BONII AN ZUIMAA
Application Number:
JP16035381A
Publication Date:
June 12, 1982
Filing Date:
October 09, 1981
Export Citation:
Assignee:
WESTERN ELECTRIC CO
International Classes:
H04M11/06; G08C15/06; G08C25/02; H04L1/24; H04M11/00; (IPC1-7): A61B5/00; G08C19/00; G08C25/00; H04M11/00
Domestic Patent References:
| JPS5483304A | 1979-07-03 | |||
| JPS53120309A | 1978-10-20 |