ER75s
5.5
Description of individual components of the router
5.5.1
GSM/GPRS/EDGE module
Cinterion module is used for GSM network wireless communication. It is integrated into
the printed circuit board. The slide-out SIM card reader is accessible from the front panel. The
FME antenna connector is accessible from the rear panel.
GSM/GPRS/EDGE module is equipped with a USB 2.0 Full Speed interface which is
brought to the USB-B connector marked USB. The module is connected to the control mi-
crocomputer via the high-speed serial interface RS232.
GSM/GPRS/EDGE module
•
Communicates in four GSM bands (850 MHz, 900 MHz, 1800 MHz a 1900 MHz).
•
In the GPRS mode it is able to transmit in three "Time Slots" and receive in two (GPRS
multi-slot class 10 – the maximum bit rate of reception is 42.8 kb/s) or transmit in one
"Time Slot" and receive in four (GPRS multi-slot class 12 – the maximum bit rate of
reception is 85.6 kb/s).
•
In the EDGE mode it is able to transmit in three "Time Slots" and receive in two (EDGE
multi-slot class 10 – the maximum bit rate of reception is 118.4 kb/s) or transmit in one
"Time Slot" and receive in four (GPRS multi-slot class 12 – the maximum bit rate of
reception is 236.8 kb/s).
•
Supports coding schemes CS1 to CS4 and MCS1 to MCS9.
Attention!
The transmitting and receiving in timeslots depends on the operator networks
possibilities.
5.5.2
Control microcomputer
The core of the ER75s router is a 32-bit microprocessor with 16 MB RAM, 4 MB FLASH
EEPROM, serial interface RS232 and an Ethernet interface 10/100 Mbit/s. The microcomputer
is connected to the MC75i OEM module through the serial interface and controls the commu-
nication via GSM/GPRS. Towards to the user it is connected on the Ethernet interface.
•
The software is built on the uClinux operating system.
•
The router supports services such as DHCP, NAT, GRE, IPSec tunnels, etc.
•
The router settings are saved in the FLASH EEPROM memory. All configuration of the
modem can be done through a web interface (HTTP) which is security password con-
trolled.
10
Summary of Contents for ER75s
Page 1: ...EDGE router ER75s USER MANUAL ...
Page 40: ...ER75s Figure 24 Topology of example LAN configuration 1 32 ...
Page 54: ...ER75s Figure 33 Mobile WAN configuration 46 ...
Page 59: ...ER75s Figure 38 Firewall configuration 51 ...
Page 76: ...ER75s Figure 49 IPsec tunnels configuration 68 ...
Page 78: ...ER75s Figure 53 Topology of GRE tunnel configuration 70 ...
