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.
www.ipc2u.ru
www.moxa.pro
