Pulse or digital communications – Transceivers – Transmission interface between two stations or terminals
Patent
1996-11-04
1999-06-01
Chin, Stephen
Pulse or digital communications
Transceivers
Transmission interface between two stations or terminals
375220, 375219, 375221, 375222, 370276, 370295, 370464, 370480, 455 73, H04B 138, H04B 156, H04L 514, H04L 516
Patent
active
059094630
ABSTRACT:
A transceiver (5) for an asymmetric communication system such as asymmetric digital subscriber line (ADSL) includes a configuration register (71) defining operation at either a central office (CO) or a remote terminal (RT). The configuration register (71) includes a control bit (72) for selecting either CO or RT mode. The transceiver (5) includes a signal processing module (70) configured according to the state of the control bit (72). For example, a digital interface (70) converts transmit data into transmit symbols and converts received symbols into receive data. The digital interface (70) uses a large memory (158) as a buffer in the transmit path and a small memory (160) as a buffer in the receive path in CO mode. In RT mode, the digital interface (70) uses the small memory (160) in the transmit path and the large memory (158) in the receive path. The selective configuration allows a single integrated circuit to be used in both CO and RT equipment.
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Alliance for Telecommunications Industry Solutions, "Asymmetric Digital Subscriber Line (ADSL) Metallic Interface", Draft American National Standard for Telecommunications, Network and Customer Installation Interfaces, T1E1.4/94-007R7, pp. i-xii and pp. 2-171.
Everett Jody
Gleason Jeffrey P.
Greaves Carlos A.
Johnson Terence L.
Levin Howard E.
Chin Stephen
Maddox Michael W.
Motorola Inc.
Polansky Paul J.
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