Multiplex communications – Wide area network – Packet switching
Patent
1992-05-04
1993-03-23
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04L 1256
Patent
active
051970678
ABSTRACT:
Data flow control applied to a packet communication system including data terminal equipment (DTE), a first MODEM connected to one of the DTEs, a telephone switching nework (TSN) connected to the first MODEM, a packet switching network (PSN) having an assembly and disassembly equipment (PAD) and a second MODEM connected to PAD and provided between PAD and TSN and carried out by using MODEM control signals, logic signal "1" and "0", and control characters, DC1 and DC3, is performed: discriminating a designated response signal, /REL in CONNECT .alpha..beta..gamma..delta./REL. from a header of data transferred through the first and second MODEMs each having a buffer memory used for error correction of the data. In addition the MODEM control signals are made effective and the control characters are made ineffective and are controlled when the designated response signal is detected. The MODEM control signals are made ineffective and the control characters are made effective when no designated response signal is detected at PAD.
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patent: 4975910 (1990-12-01), Onder
Fujimoto Akio
Shirai Nobuo
Fujitsu Limited
Olms Douglas W.
Samuel T.
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