Leica GPS1200 Series Technical Reference Manual page 583

Next step
Config...\Interfaces... - Controlling Devices
GSM Global System for Mobile Communications is a more efficient version of
CDMA technology that uses smaller time slots but faster data transfer rates.
It is the world's most commonly used digital network.
IF using a digital
cellular phone of
technology
GSM
CDMA
THEN
Refer to "24.1.2 Configuring a GSM Connection".
Refer to "24.1.3 Configuring a CDMA Connection".
GPS1200 583