Chapter 3: Setup and Configuration
GSM Functionality
This section provides advanced GSM information that requires connection to a PC running
either Hemisphere GNSS’ PocketMax utility or a terminal program such as HyperTerminal.
This section covers the following topics:
GSM overview
GSM modes
Configuring GSM for NTRIP
SMS messaging
AT&T 2G Network
Due to a recent change to the AT&T 2G data network, the S320 internal GSM modem will no
longer operate on the AT&T data network in the United States. This change, known as the
“AT&T 2G Sunset”, was implemented on January 1st, 2017. S320 users who require the use of
the S320 with a data network connection will need to use one of the following three options to
establish a connection.
1. Replace your current AT&T SIM card with a SIM Card from T-Mobile. This will allow the
use of the S320 internal GSM modem.
2. Use the “Data Collector Internet” option in Carlson SurvCE software to establish a
network connection using the internal modem inside of the data collector. In that case
the AT&T network can still be used.
3. Tether the data collector in use with the S320 to a Wi-Fi hotspot to gain access to a data
network using the “Data Collector Internet” option in the Carlson SurvCE software. In
that case the user must have an external internet hotspot available, created with a
mobile phone.
GSM Overview
Global System for Mobile Communications (GSM) is a network technology for mobile phone
communications. The GSM modem in the S320 is what allows you to connect to a GSM carrier.
The Access Point Name (APN) is a protocol that allows the S320 to access the internet using the
mobile phone network. It is a configurable network identifier used when connecting to a GSM
carrier. The default APNCFG value is "internet.com". The specific APN required by the S320 depends
on your mobile carrier. Check with your mobile provider for details.
GSM Modes
The GSM module operates in four modes:
IDLE - Default mode for the module. In this state, the GSM module only attempts to
register on the network.
DIRECT IP - For users who have direct access to a server providing differential
corrections.
LINK - For users to establish a link between two S320 modules directly, where the
BASE has a dynamic IP address. You should only use this mode on the rover in a base
station / rover setup (use IDLE mode for the base station).
NTRIP - Used to provide differential correction information to the GPS receiver.
To Next Page
Loading...
