Multiplex communications – Wide area network – Packet switching
Patent
1985-12-02
1987-06-09
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701101, 379230, H04J 312
Patent
active
046726039
ABSTRACT:
Common channel interoffice data transfer circuitry is shown for transmitting and receiving both analog and digital CCIS data. This data transfer circuitry is a data terminal equipment control circuit. The terminal equipment control circuit is microprocessor controlled. The terminal equipment control circuit is adaptable to transfer CCIS data to analog interfaces, such as modems. The circuit is also adaptable to transfer CCIS data to and from digital data sources, such as digital trunks or T1 spans. The design of this circuit possesses a high degree of commonality and, therefore, requires a minimal amount of components.
REFERENCES:
patent: 4464748 (1984-08-01), Krikor
patent: 4466062 (1984-08-01), Krikor
patent: 4488004 (1984-12-01), Bogart et al.
patent: 4499336 (1985-02-01), Krikor et al.
Bogacz Frank J.
GTE Communication Systems Corporation
Olms Douglas W.
Rokoff Kenneth I.
Xiarhos Peter
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