Pulse or digital communications – Repeaters – Testing
Patent
1983-05-12
1985-02-05
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 10, 371 15, 179 2DP, H03K 1332
Patent
active
044981864
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.
REFERENCES:
patent: Re30037 (1979-06-01), Bass
patent: 3743938 (1973-07-01), Davis
patent: 3787810 (1974-01-01), Wiggins et al.
patent: 3910322 (1975-10-01), Hardesty, Jr. et al.
patent: 3914743 (1975-10-01), Fitch et al.
patent: 4046964 (1977-09-01), Daugherty et al.
patent: 4055808 (1977-10-01), Holsinger et al.
patent: 4245342 (1981-01-01), Entenman
patent: 4273955 (1981-06-01), Armstrong
patent: 4311882 (1982-01-01), Johner et al.
patent: 4317207 (1982-02-01), Fujimura et al.
patent: 4351059 (1982-09-01), Gregoire et al.
patent: 4398297 (1983-08-01), Hwang et al.
Hwang Jong-Yeong H.
Thayer Stevan J.
Zimmer Bonnie A.
AT&T Bell Laboratories
Chin Stephen
Griffin Robert L.
Slusky Ronald D.
LandOfFree
Data set diagnostic system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data set diagnostic system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data set diagnostic system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2085745