Voip in java

i need some informations about coding transmision protocol of voice over ip: SIP and h323. what classses do i need to code rtp, rtps. where do i find it? Please, help me.
[177 byte] By [kynyoua] at [2007-11-27 1:02:29]
# 1
hey just visit http://javasoft.blogspot.com http://javasolution.blogspot.com/2007/04/rtp-using-java.html
Arunssofta at 2007-7-11 23:37:28 > top of Java-index,Security,Cryptography...