What product can be used to connect more than one DF1 master device to one or more DF1 slave devices?

The 5202-DFNT-DFCM4 or the 5202-MNET-DFCM4 gateways are capable of allowing multiple masters to communicate with 1 or more DF1 slave devices.
This gateway has 4 configurable DF1 serial ports that facilitates the exchange of data between the devices attached to the gateway.