Hi everybody,<br><br>I have go through the Micosoft Live Communcication Server 2005 technical document. From that I come to know that it support TCP/TLS to SIP. In the current implementation of Asterisk 1.2.0, it supports UDP but not TCP/TLS. These are the following points which talk about the support for TCP to SIP.<br>1. Fast Retrasmit<br>2. Cogestion Control<br>3. Error Handling<br>4. Reliability<br>5. Resolution of NAT and Firewall issues<br>6. SIP over TLS<br><br>Whether SIP over TCP/TLS support is available ??? If not, we need to do it !!!<br><br><br><p> 
        
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