06970451 is referenced by 12 patents and cites 18 patents.

A system and method of routing communication signals is provided. A first technique uses a packet switched device that operates using Internet Protocol, the packet switched device determines one or more commands based on a routing request to establish, maintain, restore or breakdown one or more communication paths and a circuit switched device that provides physical switching between a plurality of ports based on the one or more commands from the packet switched device. A second technique for expediting error condition information is also provided. As various error conditions are recognized, information relating to the error conditions is provided directly to the packet switched device to enable the packet switched device to restore communications with minimal delay.

Title
Smart routers-simple optics: network architecture for IP over WDM
Application Number
9/685953
Publication Number
6970451 (B1)
Application Date
October 12, 2000
Publication Date
November 29, 2005
Inventor
Gisli Hjalmtysson
Gillette
NJ, US
Jennifer Yates
Madison
NJ, US
Albert Gordon Greenberg
Summit
NJ, US
Agent
Michael Haynes
Assignee
AT&T
NY, US
IPC
H04J 001/16
H04J 003/14
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