Moxa OnCell G2111 [33/48] Gprs overview

Moxa OnCell G2151I [33/48] Gprs overview
OnCell G2111/G2151I Series GPRS Connection
6-2
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 G2111/G2151I 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 G2111/G2151I 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.
Installing the Modem Driver
1. In the Control Panel, open Phone and Modem Optionsand go to the Modemtab. Click Add to add a new
modem.

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