asterisk users - Oct 2006 - Setting the H323 Callerid sent by asterisk (using chan_h323)

Successfully hooked up a Cisco CallManager to a local * installation
via H323.  Things are working fine when dialling from CCM to *, but
I'm seeing a callerid of 'root' coming up on the CCM Phone when
dialling into *.  Is there any way of setting this to be something
else?  I'm guessing the name is coming from the ID that * is running
as.

I'm using the chan_h323 driver and have searched for a way of setting
it in the h323.conf file without luck.

Any ideas??

TIA