You use more than 200 IP addresses?

Can you communicate with both networks with a laptop?

Usually a device that is on a network can not communicate with devices that are on another network unless there is a router between the networks and it this case the solution should be quite trivial.

The router works as a gateway, that handles teh transition between the two networks. The pronto should not care how many networks are there around it is the same fot it, it just calls an ip address if it doesn't fint it on it's own network it handles the address to the router that does the work. Because otherwise the pronto would not be able to surf the web.