08488447 is referenced by 40 patents and cites 623 patents.

A system and method for establishing a phone call over a packet network. The process may receive a call request from an originating call device to a termination call device. A determination may be made to determine whether the terminating call device is available. If the terminating call device is determined to be available, transmission path status information between the originating and terminating call devices may be retrieved. Status of the transmission path on the packet network between the originating and terminating call devices may be determined. If the status of the transmission path is determined to be within a first range, a call may be established between the originating and terminating call devices via an encoder/decoder (CODEC) having a first data rate. Otherwise, the call may be established between the originating and terminating call devices via a CODEC having a second, lower data rate.

Title
System and method for adjusting code speed in a transmission path during call set-up due to reduced transmission performance
Application Number
11/809882
Publication Number
8488447 (B2)
Application Date
May 31, 2007
Publication Date
July 16, 2013
Inventor
William L Wiley
Overland Park
KS, US
Robert J Morrill
Overland Park
KS, US
Michael K Bugenhagen
Olathe
KS, US
Agent
Patton Boggs
Assignee
CenturyLink Intellectual Property
CO, US
IPC
H04L 12/66
H04L 1/00
H04L 12/26
View Original Source