Michael A Aronson

US Patent:

6700970, Mar 2, 2004

Filed:

Jul 17, 2000

Appl. No.:

09/617777

Inventors:

Michael Aronson - Lexington MA
Thomas Joseph Schmidt - Milford NH

Assignee:

AOX Incorporated - Bedford MA

International Classification:

H04M 700

US Classification:

379225, 37939501

Abstract:

In a telephone system employing a PBX server to communicate with local telephones over a local area network, fallback adapters are provided to automatically respond to a power failure and also respond to the failure of the PBX server to automatically connect the telephones directly to a telephone line. This automatic connection enables the telephones to be used as analog phones and make and receive calls directly without using the PBX server. Power failure is detected by relays which default to a position to connect the telephones directly to the telephone line. The fallback detectors have controller logic which detects the presence of a ringing signal on the telephone line and the failure of the PBX to respond to the ringing signal. In addition, the fallback detectors detect the failure of the PBX to respond when a telephone is used to attempt to make an outgoing call or a call to another one of the local telephones. When the controller logic detects a failure of the PBX server to respond, the controller logic actuates the relays to their default positions.

US Patent:

61286737, Oct 3, 2000

Filed:

Nov 14, 1997

Appl. No.:

8/970736

Inventors:

Michael D. Aronson - Lexington MA
Joel Silverman - Mt. View CA

International Classification:

G06F 1328

US Classification:

710 22

Abstract:

A digital protocol translator including a first protocol circuitry having a first I/O port adapted to communicate using a first digital protocol, the first protocol circuitry including a first controller. The translator further includes a second protocol circuitry having a second I/O port communicating using a second digital protocol different from the first digital protocol, the second protocol circuitry including a second controller in communication with the first controller, such that communications between the first I/O port and the second I/O port are translated between the first protocol and the second protocol. Preferably, the translator further includes a microprocessor and digital memory, where the microprocessor operates under the control of a program stored in the memory. Also preferably, the first controller includes a first state machine, a first plurality of registers, and a first DMA interface, and the second controller includes a second state machine, a second plurality of registers, and a second DMA interface.