Multiplex communications – Wide area network – Packet switching
Patent
1989-07-07
1990-10-02
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701101, 379100, 358442, H04N 100
Patent
active
049611852
ABSTRACT:
A terminal equipment and a method for controlling a subject terminal equipment coupled to an ISDN. First, it is discerned whether a message supplied from the ISDN is received. Next, each time the message is received, it is determined whether the message includes information on whether a different terminal to be communicated with by the subject terminal is a terminal coupled to either an ISDN or an analog network. Then, it is checked whether the different terminal is a terminal coupled to the ISDN or an analog network by referring to the information included in the message. When the different terminal is determined to be a terminal coupled to the ISDN, a group 4 facsimile transmission protocol is selected and executed. On the other hand, when the other different terminal is determined to be a terminal coupled to the analog network, a group 3 facsimile transmission protocol is selected and exectuted.
REFERENCES:
patent: 4689789 (1987-08-01), Herger
patent: 4746986 (1988-05-01), Tanigawa
patent: 4792800 (1988-12-01), Fujioka et al.
ntz, vol. 37 (1984), No. 9, pp. 578-586.
CCITT, Sixth Plenary Assembly, Orange Book, vol. VII, Geneva, pp. 175-203.
Hsu Alpus H.
Olms Douglas W.
Ricoh & Company, Ltd.
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