Can an AC/CL 4490 talk to an AC/CL 4790?

Answer

The AC/CL 4490 and AC/CL 4790 share the same hardware but they have different firmware loaded to them making them operate under two different RF architectures. The 4490 is a Server/Client architecture where the Clients stay in sync with the Server through Server beacons that are sent out at the beginning of every hop. The 4790 is a masterless architecture where the radios are normally out of sync and only sync up when there is a message to be transmitted.  An AC/CL 4490 will not talk to an AC/CL 4790.