We have a customer with remote sites connected via wireless. I want to setup the ESI-Link between the sites using their existing network. Is this possible?

Site A (ESI100) 10.10.10.201
Site B (ESI50) 10.10.10.202
Site C (ESI50) 10.10.10.203

Gateway 10.10.10.1
Subnet 255.255.255.0