Patent 07460520 - Apparatus and method for using multiple call controllers of voice-band calls > Summary
US Patent
Patent Application No. US 07460520
Published on Dec 2, 2008
Application No. 10/463964
Field on Jun 18, 2003
Classification
International:
H04L 12/66
National:
370/352
370/356;
Field of Search
370/352
370/356;
370/395.1;
370/524;
370/401;