Asynchronous duplex data communication for requesting services

Details Asynchronous duplex data communication for requesting services Asynchronous duplex data communication for requesting services

1989-01-13

1990-12-11

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 79, H04L 514

Patent

active

049775553

ABSTRACT:
A method of asynchronous duplex data communication between a pair of stations, a PABX and a telephone management system (TMS) relating to specific services to be performed by one of the two stations, the one station requesting, by means of an initialization request, a specific service and the number of times that this service is to be performed simultaneously, and the other station, depending on its capacity, allocating, by means of an initialization response, a number of times that the service can be performed simultaneously, which number is equal to or smaller than the requested number. After the number is allocated, it is possible to proceed by means of transaction messages to the actual performing of the services. These services for example apply to specific applications of a telephone system in a hotel.

REFERENCES:
patent: 3934093 (1976-01-01), Thyselius
patent: 4432089 (1984-02-01), Wurzburg et al.
patent: 4445213 (1984-04-01), Baugh et al.
patent: 4580261 (1986-04-01), Pelotte
patent: 4633489 (1986-12-01), Morishita
patent: 4644525 (1987-02-01), Ellis et al.
patent: 4740957 (1988-04-01), Cassidy et al.
patent: 4750169 (1988-06-01), Carse et al.
C. M. Smits, "Telephone Management Functions", Philips Telecommunication Review, vol. 43, No. 2, Jun., 1985, pp. 172-181.

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