Communications: electrical – Continuously variable indicating – With meter reading
Patent
1988-03-15
1989-03-14
Safourek, Benedict V.
Communications: electrical
Continuously variable indicating
With meter reading
3408252, 34082521, 370103, 370100, 375107, G08B 536, H04L 710
Patent
active
048128392
ABSTRACT:
A digital subscriber line formed by terminal equipment, a network control device including a plurality of the terminal equipment, and an exchange terminal. In a waiting state of the digital subscriber line, the network control device is placed in a state which can only receive a signal. A sending portion of the network control device is driven when, at a call from the terminal equipment, the terminal control device receives a line activation signal from the exchange equipment and when, at an incoming state from the state from the exchange terminal, the terminal control device receives a line activation from the exchange equipment. The synchronization pattern signal is sent from the sending portion to the exchange terminal so that the synchronization of the exchange terminal is established.
REFERENCES:
patent: 4553235 (1985-11-01), Svensson
patent: 4562573 (1985-12-01), Murano et al.
patent: 4574376 (1986-03-01), Dahlqvist
patent: 4581733 (1986-04-01), Sarson et al.
patent: 4592047 (1986-05-01), Fundneider
patent: 4592051 (1986-05-01), Frizlen
CCITT Document AP VIII-97-E, Jun., 1984, pp. 150-195.
Hatano Takashi
Kawato Yutaka
Nara Takashi
Ogawa Yasunori
Okada Sumie
Fujitsu Limited
Safourek Benedict V.
Smith Ralph E.
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