Hybrid gateways are common. I assume you want caller-id on the FXOs which is the reason you are using H323? There are pros and cons to use one or the other. Some times you just grab some advantages of one gateway type and some of advantages of the other.

we have a little doc with a comparison in case you want to take a look at it:

MGCP and H.323 Voice Gateway Protocol Comparison

http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00806fedbe.shtml

And as mentioned this is a really common scenario in which you mix H323 and MGCP

HTH

javalenc

if this helps, please rate

Yes it is for caller ID support.

But i will have a 4 port fxo card. Ports 0, 1 2 will be h323 controlled , port 3 will be mgcp.

And then I will have a 2 port fxs controlled as mgcp which will only use the fxo controlled port for out bound calls.