[cisco-voip] SIP to H.323 interworking

[Danny Halle]

Hi, I'm new to the list.
I've been playing with a 3660 loaded with a "voice ip to ip" IOS.
H.323 to H.323 and SIP to SIP calls work great, but I couldn't make SIP 
to H.323 or H.323 to SIP calls work.
They ring but at the time the receiving party picks up, it keeps ringing 
and never connects.
I've been looking for documentation but couldn't find any examples.
I'm using Version 12.4(4)T (c3660-jk9s2-mz.124-4.T.bin) on a 3660 with 
128Mb System Memory and 64Mb flash.
Any suggestions ?
Thanks !