[Asterisk-Users] HELP: Asterisk - SIP to H.323 translation

[UTRINI at embratel.com.br]

Hi all,
I am new to this list...
Can I use Asterisk as a SIP Proxy and as a SIP to H.323 translator?
I want to implement  PC-to-Phone calls in the following topology (for
signalling):

SIP Softphone --> Asterisk --> Gatekeeper H.323 ---> Gateway H.323 --->
PSTN

The RTP audio packets would go direct through Softphone to gateway.

Does someone have a configuration file example of Asterisk?

Thanks for your help,

Helaine