Multi site DECT roaming

I’m planning the extensions for the Asterisk pbx to a new site of my company. What I want is to share the pbx instance (connected via VPN) between the sites and allow DECT user mobility.
My DECT hardware is a Gigaset N720. My idea is to install another N720 manager with two bases on the new plant and register a second base on the phones.
Is this a supported configuration?

The roaming phones will be phisically connected to only one manager at time, but will be registered on two dect manager.

Thank you.