Sierra Wireless AirLink RV50 Series User Manual page 353

Modbus/BSAP Configuration
When you configure Dynamic DNS for the host device, note your device name
and domain setting in ACEmanager in the menu selection Dynamic IP to be used
with the remote devices.
When you use names instead of IP addresses, to ensure your devices are
updated quickly with the correct IP addresses for the names, set the DNS settings
as well.
Configure *DNSUSER to the same IP address as the Dynamic DNS
(*IPMANAGER1). If your devices have dynamic IP addresses and not static (the
IP address can change when it is powered up), configure *DNSUPDATE to a low
interval to allow frequent updates.
Rev 1 Dec. 17 353 41111088