Sierra Wireless 2170042 - Manual (Page 9)

IP Manager
9 2170042
Note: The IP Manager service from Sierra Wireless is currently not a
guaranteed service though every effort is made to keep it operational
24/7.
When using the IP Manager servers of Sierra Wireless, since
there are many modems using the service, it is even more
imperative to have a unique name for your modem.
DNS: Using Names Instead of
IP addresses
The modem has the ability to query DNS servers in order to
translate domain names into IP addresses. This allows you to
use domain names in place of IP addresses for most of the
configuration options requiring IP addresses. This is
important if your modem will need to contact another modem
or other device that has a domain name but an unknown or
dynamic IP address (such as another remote modem using IP
Manager).
Configuring DNS
Generally, when your modem receives its IP address from
your cellular provider, as part of the connection process, it will
also receive your cellular provider’s DNS servers to use for
resolving (or translating) names to IP addresses which it will
automatically configure in the modem settings. Unless your
modem will be used on a network with other modems or
devices which have names internal to the local network or
frequently changing IP addresses, the DNS servers provided
by your cellular provider should be all you need.
If the modem will be communicating with a device that has a
domain name but changes its IP address frequently (such as
another AirLink modem using IP Manager) or is on a network
where devices are accessed by names rather than IP addresses,
you will want to put in an alternate DNS (*DNSUSER) where
that domain is updated, such as the IP Manager server the
remote modem is using or the listing of IP addresses to names
is kept.