The CDRs (call detail records) from the Bridge 2200 use POSIX time format (aka Unix time):
Unix time counts in seconds, and 0 was at 00:00:00 (UTC) on 1 January 1970. So, for example from the image above, 1299078760 is (Wednesday) 2nd March 2011 at 15:12:40 GMT.
There are many online converters which can tell you what a POSIX time is in regular time format, for example:
...along with many others.