sipX 3.8 was released last week, and as such I have updated the Exchange UM guide with instructions on setting up version 3.8. This resolves the random timeout issue in version 3.6 that I described in an earlier post.
The VM that we used previously was quite old. It was based on Centos 4 and sipX 3.0, and contained a lot of other useless junk.
In the new instructions we use a bare-bones Centos 5 Virtual Machine, and install sipX 3.8 ourselves. This results in a faster more efficient VM.
Because the last VM was so dodgy, I'm not going to provide instructions for upgrading your old 3.0/3.6 servers to 3.8. You can perform a yum update if you really want, but I strongly recommend dropping that old VM and starting again. It will only take a short amount of time, and will be well worth it in the long run.
If anyone has had any experience with the SIP/TCP patch for Asterisk, please get in contact with me. I would like to hear about your results.