I've created a Freeswitch integration via the Signalwire dashboard.  It is working fine.  My question is how can we make this failover to a secondary Freeswitch server in the event that the one my integration is built to goes down?  For example, phone number 555-555-1234 is configured to accept incoming calls as voice calls, utilizing the Freeswitch Connector FS1.  If FS1 goes down I'd like to re-route the call to FS2.  Is this possible with the integration or would I be better off handling the call via a SIP GW instead of using the integration?