Quan Li

US Patent:

8254371, Aug 28, 2012

Filed:

Jun 13, 2002

Appl. No.:

10/171026

Inventors:

Saswata Bhattacharya - Sayreville NJ, US
Mahendra Pratap - Cliffwood Beach NJ, US
Harvey S Schultz - Manalapan NJ, US
Quan Li - Edison NJ, US
Serafim Maroulis - Aberdeen NJ, US

Assignee:

Alcatel Lucent - Paris

International Classification:

H04L 12/66

US Classification:

370352, 370389, 370401, 379 8817, 379 9324, 709227

Abstract:

A server, upon receiving a request to complete a call over a packet-switched network, looks up an address on the packet-switched network on a local table. If the local table does not contain a matching address, the server asks a routing server to identify a receiving server address. The routing server identifies a suitable address and sends a message to the originating server containing the address. The routing server may consider such factors as the volume of calls currently being handled by various potential receiving servers in selecting a receiving server. The receiving server then receives, via the packet-switched network, a message requesting a telephone connection to a second telephone device. Before completing the connection to the second telephone device, information in the message representing the address of the device on the packet-switched network that originated the message is identified. The address information is compared to selected predetermined addresses for permitted origins of the message.

US Patent:

20120263172, Oct 18, 2012

Filed:

Jun 11, 2012

Appl. No.:

13/493343

Inventors:

Saswata Bhattacharya - Sayreville NJ, US
Mahendra Pratap - Cliffwood Beach NJ, US
Harvey S. Schultz - Manalapan NJ, US
Quan Li - Edison NJ, US
Serafim Maroulis - Aberdeen NJ, US

International Classification:

H04L 12/66

US Classification:

370352

Abstract:

A server, upon receiving a request to complete a call over a packet-switched network, looks up an address on the packet-switched network on a local table. If the local table does not contain a matching address, the server asks a routing server to identify a receiving server address. The routing server identifies a suitable address and sends a message to the originating server containing the address. The receiving server then receives, via the packet-switched network, a message requesting a telephone connection to a second telephone device. Before completing the connection to the second telephone device, information in the message representing the address of the device on the packet-switched network that originated the message is identified and the address information is compared to selected predetermined addresses for permitted origins of the message.

US Patent:

6353610, Mar 5, 2002

Filed:

Jun 19, 1998

Appl. No.:

09/100627

Inventors:

Saswata Bhattacharya - Sayreville NJ
Mahendra Pratap - Cliffwood Beach NJ
Harvey S. Schultz - Manalapan NJ
Tript P. Singh - Tinton Falls NJ
Quan Li - Edison NJ
Ghassan Z. Qadah - Westbank, IL
Gregory J. DAngelo - Branchburg NJ

Assignee:

Lucent Technologies, Inc. - Murray Hill NJ

International Classification:

H04L 1266

US Classification:

370352, 370353, 370355

Abstract:

A telephone call from first telephone device to a second telephone device is initiated by a call directly from the first telephone device to a first gateway. The first gateway receives dialed digits from the second telephone device, identifies an address on a packet switched network of a second gateway associated with the second telephone device, which identified by the dialed digits. The first gateway contacts the second gateway via the packet-switched network. The second gateway initiates a circuit-switched telephone connection to the second telephone device. When a ringing signal or busy signal is received from the second telephone device by the second gateway, the second gateway provides a signal via the packet-switched network to the first gateway. The first gateway provides the corresponding signal to the first telephone device.