3com 4500g switch – link state logging?

I’m trying to run a survey of the site in order to determine which ports are utilized across about 15 of our switches here.

I’ve already enabled a syslog server, and configured one of the switches to send logs to that machine. So far the commands I’ve discovered are these:

info-center enable
-Turns on logging
info-center loghost x.x.x.x
-Sends log to syslog server, x.x.x.x

Both of these work, however the level of logging isn’t useful to me. How can I turn on extended logging to tell when a switch port goes up or down?

Thanks.