Inventor
SCHAFER R MICHAEL
US3 patents
Patents
3 patentsUS6208618B1Mar 27, 2001
Method and apparatus for replacing lost PSTN data in a packet network
TELLABS OPERATIONS INC47 citations90
US7003000B1Feb 21, 2006
Method and apparatus for replacing lost PSTN data in a packet network
TELLABS OPERATIONS INC4 citations60
US7940747B2May 10, 2011
Method and apparatus for replacing lost PSTN data in a packet network
TELLABS OPERATIONS INC1 citations49