asterisk users - Oct 2003 - newbie question: 1 or 2 servers

Hi!

I have an H.323 network. I am trying to do a SIP-H.323 gateway to be able to
accept all the calls that come from other networks (SIP).

I have some questions:

- Must I use IAX? If so, how? I have not SIP servers, I only have a H.323
gatekeeper.

- If not, where is that I say that one call that come from SIP must be
translated to H.323 and vice-versa?

Thanks a lot for all your help.

Mireia