Hi, I read in LCR doc:
1.4.4. to_gw([group-id]) Checks if in-dialog request goes to a gateway. If an optional group-id is given, only gateways belonging to this group are checked.
I suppose that a gateway uses its scheme:IP:port as "Contact" in 200 OK, so "to_gw()" function matches that scheme:IP:port in RURI and verifies if there is a To tag to match an in-dialog message and deliver it to gateway. Is it?
Thanks for any explanation.