Christopher R Moran

US Patent:

6438131, Aug 20, 2002

Filed:

Jul 28, 1998

Appl. No.:

09/123860

Inventors:

Patrick A. Gerber - Hazlet NJ
Christopher B. Moran - Middletown NJ
Richard Szajdecki - Jackson NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 1256

US Classification:

370395, 370469

Abstract:

Information is communicated in an Asynchronous Transfer Mode (ATM) or other packet-based communication system using a service specific convergence layer which associates a holdover indicator with each of a number of packets generated in a voice and telephony service layer. The service specific convergence layer may be a Service Specific Convergence Sublayer (SSCS) of an ATM Adaptation Layer (AAL) Type 2 connection, and the holdover indicator may be a holdover bit in a user-to-user-indication (UUI) field of a Common Part Sublayer (CPS) header of the AAL 2 connection. The holdover indicator may specify, for example, whether a speech detector used for providing silence elimination in the transmitted information is in a holdover mode. The indicator can thus be used by a receiver to determine if a period of silence has begun in the transmitted information, so as to facilitate the generation of comfort noise. The holdover indicators can also be used to provide rate control in a CPS transmitter of an AAL 2 device.

US Patent:

7006511, Feb 28, 2006

Filed:

Jul 17, 2001

Appl. No.:

09/907120

Inventors:

Christopher Lanzafame - West Deal NJ, US
Christopher B. Moran - Middletown NJ, US
Richard Szajdecki - Jackson NJ, US

Assignee:

Avaya Technology Corp. - Basking Ridge NJ

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370412, 370429, 370516, 375371

Abstract:

A variable-size jitter buffer is used to store information associated with a voice signal, facsimile signal or other received signal in a receiver of a packet-based communication system. The receiver determines an appropriate adjustment time for making an adjustment to the size of the buffer based at least in part on a result of a signal detection operation performed on the received signal. For example, in the case of a received voice signal, the determined adjustment time may be a time at which a state machine associated with a speech detector is in a “no speech” state. If the actual buffer size at the determined adjustment time is not within a designated range of a target computed at least in part based on one or more jitter measurements, the buffer size is adjusted at the determined adjustment time, e. g. , by an amount representative of the difference between the actual buffer size and the target. The invention provides low-delay and low-complexity jitter buffering particularly well suited for use in an Internet Protocol (IP) receiver of a voice-over-IP system.

US Patent:

8054171, Nov 8, 2011

Filed:

Mar 16, 2008

Appl. No.:

12/049355

Inventors:

Christopher Lanzafame - Ocean Township NJ, US
Christopher Moran - Middletown NJ, US
Richard Szajdecki - Jackson NJ, US

Assignee:

Avaya Inc. - Basking Ridge NJ

International Classification:

G08B 21/00

US Classification:

340459, 340458, 340534

Abstract:

A method and apparatus for allowing a troubleshooter to reuse existing indicators, such as displays, LEDs, or specialized indicators, for a purpose other than the indicator's usual purpose. In response to an initial occurrence of a problem, the troubleshooter modifies the indicator's behavior to indicate a later occurrence of a fault or a set of faults, which may be the cause of the problem. Upon the later occurrence of the problem, the indicator is monitored for simultaneous notification of occurrence of the fault. After the problem is triaged, the modified indicator is returned to its original use. The notification from the indicator can be sensory, i. e. , auditory, visible, or tactile. The indicator's change in behavior can occur after the fault happens once or an administrable threshold number of times, or intermittently. Alternatively, the change in behavior may become semi-permanent if the fault continues to occur for some administrable number of times.