Stephen N Walters

US Patent:

20040225733, Nov 11, 2004

Filed:

May 6, 2003

Appl. No.:

10/430140

Inventors:

Kaj Tesink - Fair Haven NJ, US
Joseph Clark - Little Silver NJ, US
Stephen Walters - Holmdel NJ, US

International Classification:

G06F015/173

US Classification:

709/225000

Abstract:

A message is multicast to recipients by correlating the message at a management system to agents, each agent being responsible for a set of the recipients, and by conveying the message over a network to the correlated agents for transmission to the recipients. The management system maintains recipient lists wherein each list is associated with one or more agents, each agent maintaining a portion of its associated lists. The management system chooses a single recipient list and conveys an indication of the list to its associated agents. Each notified agent accesses the indicated list and sends the message to the listed recipients. In a further embodiment, an independent management system interfaces a plurality of management systems, each with a set of agents. The independent management system chooses a recipient list, the list being associated with a management system and its agents, and conveys the message based on the chosen list.

US Patent:

20070121603, May 31, 2007

Filed:

Jan 23, 2007

Appl. No.:

11/541855

Inventors:

Joseph Clark - Little Silver NJ, US
Stephen Walters - Holmdel NJ, US
Kaj Tesink - Fair Haven NJ, US

International Classification:

H04L 12/66

US Classification:

370356000

Abstract:

VoIP Routing Registry (VRR) has been created to allow VoIP Service Providers to direct calls properly over their IP networks. In operation, the VRR translates a 10-digit or 6-digit telephone number into a URI that can be used for routing. The VRR must also take into consideration Local Number Portability (LNP).

US Patent:

46176586, Oct 14, 1986

Filed:

Apr 17, 1985

Appl. No.:

6/724199

Inventors:

Stephen M. Walters - Holmdel NJ

Assignee:

Bell Communications Research, Inc. - Livingston NJ

International Classification:

H04J 316
H04J 300
H04J 312

US Classification:

370 84

Abstract:

In order to multiplex a plurality of various rate subchannels onto a fixed rate channel, a frame structure is defined consisting of j sets of i-tuples for a total of ij bits per frame, the parameters i and j being mathematically determined as a function of the rate of the subchannels and the rate of the fixed channel. For j-l of the i-tuples, i-l bits are used for information and the last bit is set ONE. In one i-tuple all i bits are set ZERO. Framing is detected by monitoring for a ONE followed by i ZEROes, a pattern which cannot occur elsewhere in the frame regardless of the data. An integral number of information bits from each subchannel are distributed in the (i-l)(j-l) information bit positions. In the disclosed embodiment two 6662/3 bps channels and a 4800 bps channel are multiplexed onto an 8000 bps channel using a frame structure consisting of 24 quintets. In the 92 information bit positions, 72 bits are allocated for the 4800 bps channel and 10 bits each are allocated for the 6662/3 bps channels.

US Patent:

46581529, Apr 14, 1987

Filed:

Dec 4, 1985

Appl. No.:

6/804689

Inventors:

Stephen M. Walters - Holmdel NJ

Assignee:

Bell Communications Research, Inc. - Livingston NJ

International Classification:

H04J 322
H04J 300

US Classification:

370 84

Abstract:

A plurality of various rate digital subchannels are multiplexed onto a fixed rate channel by arranging the data bits from the subchannels into a framing structure consisting of j sets of i-tuples for ij bits per frame where the parameters i and j are mathematically determined as a junction of the rates of the subchannels and the rate of the fixed channel. Framing is maintained by setting each bit in the first i-tuple to ZERO and the last bit in each other i-tuple to ONE. A multiplexer-demultiplexer is described which is adaptive to the rates of the subchannels and the fixed channel in this frame structure and which can therefore be employed for any mix of subchannel and fixed channel rates. The multiplexer-demultiplexer includes a memory (204) for storing the bit assignment pattern for a frame structure configured for a particular mix of subchannel rates; plural subchannel interfaces (201-0--201-11) for storing bits directed to and from each channel and for clocking these bits onto and off the subchannels at their subchannel rates; and a kernel (203) which selects bits stored in the subchannel interfaces to form the multiplexed bit streams and distributes bits from the fixed channel to the subchannel interfaces in accordance with the stored bit assignment pattern. When a new bit assignment pattern is stored in the memory derived from a new combination of subchannel and fixed channel rates, the multiplexer-demultiplexer automatically adapts to the new frame structure and channel rates.

US Patent:

45162417, May 7, 1985

Filed:

Jul 11, 1983

Appl. No.:

6/512329

Inventors:

Robert L. Farah - Brooklyn NY
Stephen M. Walters - Aberdeen NJ

Assignee:

AT&T Bell Laboratories - Murry Hill NJ

International Classification:

H04J 300

US Classification:

3701101

Abstract:

A bit compression coding circuit incorporates signaling bit insertion. An input signal sample(s) representing, for example, PCM encoded speech or voiceband data, is delivered to a difference circuit (31) where a predicted signal (s. sub. e) is subtracted from it. The predicted signal is an estimate of the input sample derived from a predictor (32). The resultant difference signal is coupled to the input of an adaptive quantizer (34) which provides at its output a bit compressed quantized differential PCM version of the difference signal. A multiplexer (37) receives the output of the quantizer and serves to periodically preempt the least significant bit of the bit compressed PCM signal and substitute a signaling bit therefor. The output of the multiplexer is coupled to the input of an adder (38) wherein it is added to the predicted signal. The result of this addition is coupled to the input of the predictor, which in response thereto serves to generate the next predicted signal for comparison with the next input signal sample.

US Patent:

54327857, Jul 11, 1995

Filed:

Feb 7, 1994

Appl. No.:

8/192763

Inventors:

Masuma Ahmed - Middletown NJ
Stephen M. Walters - Holmdel NJ

Assignee:

Bell Communications Research, Inc. - Livingston NJ

International Classification:

H04J 324
H04Q 1104

US Classification:

370 601

Abstract:

A system and method for operating a Broadband ISDN to support a viable virtual private network (VPN) service are attained by establishing a plurality of virtual path links connecting customer locations and broadband switching systems, by cross-connecting virtual channel links at the broadband switching systems to establish end-to-end virtual channel connections, and by policing both the input and output traffic only on the virtual path links. An egress policing processor is included at each output port on broadband switches to police the traffic on each virtual path link which contains one customer's multiplexed virtual channel connection traffic.

US Patent:

45190739, May 21, 1985

Filed:

Jun 20, 1983

Appl. No.:

6/505926

Inventors:

Guido Bertocci - Neptune NJ
Stephen M. Walters - Aberdeen NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H04J 316

US Classification:

370118

Abstract:

A bit compression multiplexer (FIG. 2) for a pair of time division multiplexed digital bit streams each one of which includes a plurality of PCM encoded signals deposited in separate and distinct channels of a repetitive frame and signaling bits multiplexed therewith. The PCM encoded signals of successive frames are normally bit compressed (23) into n-bit signals, but periodically the encoded signals of a frame are bit compressed into n-1 bit signals. The bit compressed signals of the pair of bit streams are time division multiplexed (24) with each other, with the multiplexed compressed signals occupying separate and distinct channels of a repetitive frame. The signaling bits are extracted (21) from the pair of digital bit streams and are inserted (24) into predetermined n-1 bit channels of the last-recited repetitive frame. The signaling bits that are placed in a given channel are related to the encoded message signal of that channel.

US Patent:

44082720, Oct 4, 1983

Filed:

Nov 3, 1980

Appl. No.:

6/203794

Inventors:

Stephen M. Walters - Aberdeen NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

G06F 304

US Classification:

364200

Abstract:

A data control circuit (18) for an input/output arrangement is arranged for controlling the transfer of a data word through a shift register (20 or 120) to or from a peripheral device (22 or 122). The circuit (18) provides for selection between internal clock generation at one of several rates or application of an external clock and for selection of the length and format of the data words to be transferred. Selection is accomplished by an interval counter (38), format data stored in a control register (37), two gating circuits (30 and 40) and a selection circuit (35).