Using NAT does not directly affect the operation of the JPS gateways. Special considerations should be made only in the event that multiple RoIP server units will be located behind a NAT router. In that case, each unit will need to be assigned a different VoIP port and the NAT router configured to allow both TCP and UDP traffic for the VoIP ports of all the units behind it. RoIP client units are not affected by NAT and no special considerations need be made.