Communications: electrical – Continuously variable indicating – With meter reading
Patent
1993-10-15
1996-04-30
Horabik, Michael
Communications: electrical
Continuously variable indicating
With meter reading
34082547, 379 59, 455 331, H04L 1222
Patent
active
055128858
ABSTRACT:
A method for supervising and controlling the information transfer between two or more categories of users of a data network with closed user groups. Users, belonging to a first category of users, constitute, together with a number of users belonging to other categories, a special closed user group. Within this group, the users belonging to the first category are given a certain first identity, whilst users, belonging to other categories of users, are given a certain second identity, different from the first identity. Transfer of information is only allowed firstly between users with the first identity and users with the second identity and secondly between users who belong to the same closed user group.
REFERENCES:
patent: 4093819 (1978-06-01), Saito et al.
patent: 5323446 (1994-06-01), Kojima et al.
CCITT, Data Communication Networks; Services and Facilities, Interfaces vol. VIII; Nov. 1988.
S. Brutzkus et al., "An Evaluation of Schemes for Implementing Closed User Groups in Public Data Networks," Proceedings of the Pacific Telecommunications Conference, pp. 2A-1 to 2A-10, Honolulu, HI (Jan. 8-9, 1979).
Agestam Lennart
g.ang.rdh Hans
Hellered Henry
Horabik Michael
Telefonaktiebolaget L M Ericsson
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