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OnCell G2100 Series User's Manual
GPRS Overview
GPRS is a packet-switched technology, which means that multiple users share the same
transmission channel. In addition, transmission only occurs when there is outgoing data. This means
that the available bandwidth can be dedicated solely to data communication as needed. In general, a
GPRS network can be viewed as a special IP network that offers IP connectivity to IP terminals.
Devices such as PCs, embedded computers, and PLCs that are PPP-enabled can be easily
connected to the IP network and the Internet.
The OnCell G2100 Series modem is a multi-slot Class 10 device, which means that there are 4 Rx
timeslots plus 1 Tx timeslot, or 3 Rx timeslots plus 1 Tx timeslot. This requires that the provider
support CS-1 to CS-4 coding schemes. GPRS offers no guaranteed data rates or bandwidth. The
value assigned by the provider (coding scheme and timeslots) can change dynamically during a
connection.
In general, for the 1 Tx + 4 Rx combination, the Tx throughput is around 8 to 12 Kbps and the Rx
throughput is around 32 to 48 Kbps.
For the 2 Tx + 3 Rx combination, the Tx throughput is around 8 to 12 Kbps and the Rx throughput
is around 32 to 48 Kbps.
Windows GPRS Access
The OnCell G2100 Series modem can use Windows DUN (Dial-up Networking) to provide Internet
access through the GPRS mobile network. The following pages explain how to configure the modem
and your Windows system for GRPS access.
ATTENTION
The specific steps may vary depending on your version of Windows and your Windows settings.
7-2
GPRS Connection
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