urgent help needed- Call routing

[iptuser]

I have a site with the following
Central site Remote Site
CCM>>>>>>>>GW>>>>>WAN>>>>>GW>>>>>>>>>PABX

I`m now looking to roll out a pilot with a small number of users off the PABX in the remote location but keep the connection to the local PABX via a Q Sig GW


Outgoing calls
All outgoing calls from the pilot users at the remote site will be via a SRST router on site connecting via a Q Sig. to the local PABX. I will set up a route pattern pointing to the local Qsig GW via the PABX so to route calls to the PABX

Inbound

PABX >>>>>>>SRST router

The idea is that if a PABX user dials an IPT pilot user, the PABX is configured to route the call to the local QSig/ SRST GW
The SRST GW has a dial-peer with a destination pattern of the Pilot IPT users pointing to the of the CCM
Call Signalling goes to the CCM
The CCM instructs the call to the local IPT pilot user- - where does the Voice traffic route via ? - local to the router i.e only call control is across the WAN but voice is on the local LAN or via the WAN ? i.e Remote site >>>>Central CCM>>>>>Remote site >>>>>Pilot IPT handsets

thanks