Thales Z-Max Operation And Application Manual page 190

Cellular Modems
Cellular communications is a relatively new option for RTK surveying. It is a
system that operates using commercial cellular infrastructure and is independent
of distance. Cellular communications are rarely affected by any kind of
interference or movement and are robust for RTK systems. Cellular data links for
RTK do have some disadvantages. In most cases, cellular RTK is limited to point-
to-point operation which means that only one rover can operate from each RTK
base. Cellular data links for RTK cost more per use than other systems, since the
user must have be actively connected to the other side of the link while
performing RTK. The phone call between RTK receivers can last for many hours
a day. Cellular links work the best where there is extensive geographic coverage
and flat-rate, unlimited air-time rate structures are available. When cellular data
links are used for RTK surveying, base and rover receivers must use the same
type of Communication Module.
When using cellular devices, the user is required to set up an account with a
service provider. The service provider will supply the phone number and other
information needed to access the cellular service
System Components 167