Charles E Small

US Patent:

8305881, Nov 6, 2012

Filed:

Aug 17, 2004

Appl. No.:

10/919618

Inventors:

Robert S. Harby - Fair Haven NJ, US
David S. Levy - Bedminster NJ, US
Dat D. Ngo - Howell NJ, US
James Dorian Sandoz - Keyport NJ, US
Charles Small - Freehold NJ, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04B 10/17
H04B 10/08
H04B 10/12
H04J 14/02

US Classification:

370223, 398 5, 398 7

Abstract:

A method and system for maximizing wavelength reuse in an optically protected wavelength-division-multiplexed (WDM) network, the WDM network supporting a plurality of service connections, includes associating service connections supported by non-overlapping paths to form respective service channel groups, and for each service channel group, assigning at least one common wavelength channel for establishing the service connections. In addition, for each of said groups, at least one common wavelength channel is assigned for establishing a shared protection path for the service connections of each of said groups. In addition, the wavelength channels assigned for establishing the shared protection paths for each of the groups may be used for providing service connections for the WDM network when not in use as shared protection paths. However such provisional service connections are dropped when the wavelength channels are needed to establish shared protection paths. Such provisional service connections may be offered at reduced cost.

US Patent:

44801785, Oct 30, 1984

Filed:

Apr 4, 1983

Appl. No.:

6/481832

Inventors:

Robert R. Miller - Convent Station NJ
Charles Small - Freehold NJ
John H. Stothoff - Plainsboro NJ

Assignee:

AT&T Information Systems - Holmdel NJ

International Classification:

G06K 500

US Classification:

235380

Abstract:

A circuit for maximizing power transfer from a station to an interactive memory card via a capacitive interface. A reader system in the station generates an ac signal which provides operating power that is transferred to the card through the capacitive interface formed when the card is placed against a window on the station. The ac signal from the station is directed through a series resonant circuit to the card. The capacitive interface between the station and card make up the capacitive element of the resonance circuit while the series combination of the secondary of a transformer and an electrically variable inductor form the inductive element. Use of the variable inductor allows the station to tune the circuit to resonance and cancel the capacitive element, thereby maintaining maximum power transfer to the card.