ISDN terminal equipment operating with circuit switching mode an

Details ISDN terminal equipment operating with circuit switching mode an ISDN terminal equipment operating with circuit switching mode an

1990-11-16

1993-05-04

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, 370 942, H04J 324

Patent

active

052088065

ABSTRACT:
ISDN terminal equipment containing: a circuit switching communication unit, a packet communication unit, a manual starting unit, an unsuccessful try detecting unit, and a retrying unit. The manual starting unit starts an operation of a setting up of a call using a predetermined one of the circuit switching communication unit and the packet communication unit when receiving a manual start input. The unsuccessful try detecting unit detects that data communication has not been successfully begun by the operation of the manual starting unit. The retrying unit starts an operation of a setting up of a call using the other of the circuit switching communication unit and the packet communication unit when the unsuccessful try detecting unit detects that the data communication has not been successfully begun by the operation of the manual starting unit.

REFERENCES:
patent: 4592048 (1986-05-01), Beckner
patent: 4608685 (1986-08-01), Jain et al.
patent: 4761781 (1988-08-01), Calvignac
patent: 4763321 (1988-08-01), Calvignac
patent: 4821259 (1989-04-01), DeBruler
patent: 4961186 (1990-10-01), Chandramouli
patent: 4999832 (1991-03-01), Chen et al.
patent: 5023868 (1991-06-01), Davidson
Falek et al., "Standards Makers Cementing ISDN Subnetwork Layers", Data Communications, pp. 237-255, Oct. 1987 No. 11.
Peel, "International Extension of ISDN and Terminal Implications", Data Communications, pp. 171-176, Aug. 1988 No. 4.
O'Toole, "ISDN Terminals Simplify Data Transmissions", Electrical Design News, pp. 167-174, Jan. 22, 1987 No. 2.

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