i have a client that wants to use a vg224 with sccp and h323. The sccp so that features can be used on 20 of the ports and 4 remaining ports for T38 FAX using H323, does anybody know if this is a valid configuration when the gateway is specified as sccp in callmanager, will configuring the last 4 ports as H323 have any issues?
This is absolutely valid. When you configure an H323 gateway in CCM you do two things:
Enable inbound H323 calls from that IP address to CUCM
Enable outbound H323 calls to that IP address from CUCM
It's not like MGCP where there is registration and persistent messaging.
There will be no issues as this, as the VG224 is just an IOS gateway. IOS gateways can handle SIP/H323/MGCP/SCCP all on the same gateway without problems.