Multiplex communications – Pathfinding or routing – Through a circuit switch
Patent
1996-09-24
1999-03-16
Patel, Ajit
Multiplex communications
Pathfinding or routing
Through a circuit switch
370429, H04L 1250, H04Q 1100
Patent
active
058838929
ABSTRACT:
In a storage type data communication terminal, a first switch section is connected to a power feeder and turned on/off by an operator. A second switch section is connected in parallel with the first switch section and turned on/off in accordance with a control signal. An external interface section performs connection to an external information processing device. A data storage section temporarily stores data received through the external interface section. An Air interface section sequentially transmits the data stored in the data storage section to a distant station through a communication channel in accordance with a communication sequence, and stores data received from the distant station. A control section switches the second switch section from an OFF state to an ON state at the same time when a connection phase of the communication sequence is completed. When the first switch section is turned off during a communication phase, the control section holds the second switch section in the ON state until reception of an acknowledgement from the distant station with respect to data transmitted immediately before the first switch section is turned off.
REFERENCES:
patent: 4672662 (1987-06-01), Nishino et al.
patent: 5276687 (1994-01-01), Miyamoto
patent: 5293418 (1994-03-01), Fukawa
patent: 5365582 (1994-11-01), Yamada et al.
patent: 5481591 (1996-01-01), Suzuki
NEC Corporation
Patel Ajit
Phunkulh Bob A.
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