If there has been a history of devices going off line in the pure Metasys environment it is a sign that something is wrong.
It could be bad wiring,
it could be too many N2 devices on the bus,
it could be EMF,
it could be a bad transmitter on a N2 device,
it could be multiple masters accidentally installed on the bus.
Determine the issue and correct it before proceeding with the integration.