I'm currently trying to set up a new freeswitch box and consistently run in a problem with pri-line initialization (I think).

Basically I get "T316 timed out" for all but a very few channels, which get "Channel not opened, proceeding anyway" and become available.

This does not seem to happen when using openzap instead of freetdm.

The log file looks like this:
2013-06-27 08:25:17.560815 [WARNING] ftmod_libpri.c:1997 [s1c1][1:1] -- T316 timed out, resending RESTART request
.. for all channels
2013-06-27 08:25:22.600817 [WARNING] ftdm_io.c:3013 [s1c1][1:1] Channel not opened, proceeding anyway
2013-06-27 08:25:47.560814 [WARNING] ftmod_libpri.c:1997 [s1c2][1:2] -- T316 timed out, resending RESTART request
.. for all channels but the first
2013-06-27 08:26:22.600778 [WARNING] ftdm_io.c:3013 [s1c3][1:3] Channel not opened, proceeding anyway
2013-06-27 08:26:47.560815 [ERR] ftmod_libpri.c:1993 [s1c4][1:4] -- T316 timed out, channel reached restart attempt limit '3' and is suspended
2013-06-27 08:26:47.560815 [ERR] ftmod_libpri.c:1993 [s1c5][1:5] -- T316 timed out, channel reached restart attempt limit '3' and is suspended
.. for all channels but the first three or so

Eventually the first 3 or so channels are available.