Access device for an ISDN connecting device of a public terminal

Details Access device for an ISDN connecting device of a public terminal Access device for an ISDN connecting device of a public terminal

1989-12-26

1991-09-03

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

235376, 235379, 235382, 3408253, H04M 100, H04L 900

Patent

active

050458493

ABSTRACT:
An access device at a public communications terminal enables an authorized user to gain access, via a connecting device, to an integrated services digital communications network. The access device includes a connecting device (2) behind a protective member (4) which permits access only after a check of the user's access authorization and a test of the correct functioning of the connecting device.

REFERENCES:
patent: 4006459 (1977-02-01), Baker et al.
patent: 4134537 (1979-01-01), Glaser et al.
patent: 4488011 (1984-12-01), Rogers
patent: 4720849 (1988-01-01), Tayama
Mayr-Stein, Horst: Offentliches Kartentelefonsystem, TN-Nachtrichten 12/1986, H.88.
Haass, Wolf--Dieter: Neue ISDN=Endgerate, TN-Nachtrichten 12/1986, H.89.
Produktschau, ntz.Bd. 40 (12/1987) H.11, p. 800.
Elektronisches Geld, Funkschau 3/1985, pp. 39-41.
R. Martens, "Anschlusse fur vermittelte Kommunikation", Unterrichtsblatter Fernmeldewesen, vol. 41, No. 6, Jun. 10, 1988, pp. 263-277.

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