[Sip-implementors] tcp call flow

[Srinivasa R Mettu]

Hi     I am trying to implement SIP User Agent. I am using Ubiquity SIP User Agent software for testing. i am using TCP as transport protocol. When i receive an INVITE request from Ubiquity User Agent, i am sending the provisional(1XX) and final(200 OK) responses. It seems ubiquity user agent is not receiving my responses because i can see Request Timeout message in ubiquity user agent. i tried to send these responses through the initial connection and by opening an other connection to the address specified in Via header in INVITE method. any comments on this is appreciated... thanks mettu South Dakota State University, Brookings, SD