Does ANYONE know ANYTHING about H.323 and Asterisk?

Googling gets me a ton of very old information and nothing that I can use.

I want to be able to make SIP–>H.323 and H.323–>SIP calls.
I also have the GNUGK in the mix. My problems are configuring
ooh323.conf and extensions.conf.

I also need to know how to configure Asterisk alias for GW registration to

I also posted more detail in the General forum.

This is for my own learning experience. No outside vendors/providers involved.

I appreciate the help.