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MP 555 GPS Software Installation and Configuration Guide
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2130304
arrives at the CDMA network, the network has no way of
identifying the modem for which it is intended and is unable
to route the data appropriately.
Figure 6-2: An MP 555 GPS connected to a network server. In this scenario,
the IP address is “NATed” from 10.95.236.1 to 127.7.6.30. The network server
is only aware of the address 127.7.6.30 but if it sends data to that address, the
/ network cannot route the data to the modem.
Solutions to the NAT problem
If your service provider is using NAT, it is best to work with
the provider in devising a solution. Some service providers
offer, on request, accounts with public IP addresses. (There
may be additional charges for this.)
Another solution is to implement a frame relay connection
between your network and your service provider’s network.
The frame relay connection bypasses the address translation,
and is a method of overcoming NAT issues, encouraged by
some service providers.
NetMotion Wireless, Inc. is a software vendor that develops
client-server applications that operate over wireless LANs
(Local Area Networks) and WANs (Wide Area Networks). The
software attempts to overcome the issues caused by NAT
addressing by assigning its own consistent private IP
addresses. This software offers a potential solution to NAT
issues, but it is untested by Sierra Wireless, and Sierra Wireless
does not provide support for it.
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