Integrator's Manual GR47/GR48

2. GR47/GR48 RADIO DEVICES

LZT 123 7589 R1A

2. GR47/GR48 Radio Devices

2.1 About the GR47/GR48 Family

Two radio devices make up the family; GR47 and GR48, for use in the

E-GSM900/GSM1800 and GSM850/GSM1900 bands respectively.

1RWH This manual refers to the GR47 and GR48 as radio devices. If there is a

difference in the functionality of the radio devices the GR47 and GR48

information will be listed separately.

The products belong to a new generation of Sony Ericsson radio devices,

and are intended to be used in machine-to-machine applications and man-

to-machine applications. They are used when there is a need to send and

receive data (by SMS, CSD, HSCSD, or GPRS), and make voice calls over

the GSM network.

The radio devices can either have applications embedded onto them or they

can be used as the engine in an application created by the customer. The

radio device can send and receive data when a script is executed, the script

can be run internally from the radio device itself or from a micro-controller.

A typical application, involves a micro-controller and a radio device, in

which the micro-controller sends AT commands to the radio device via an

RS232 communications link.

2.2 Radio Devices in a Communication System

Figures 2.1 and 2.2 illustrate the main blocks of a wireless communication

system using the radio device. Figure 2.1 shows the communication system

when the script is embedded on the radio device and figure 2.2 shows the

communication system when a micro-controller is used. They also show the

communication principles of the system and the interface between the

radio device and the application. The definitions in the figures, as used

elsewhere in this manual, are in accordance with the recommendations of

GSM 07.07.

• The MS (mobile station) represents the radio device and SIM card. The

radio device excluding SIM card, is known as the ME (mobile

equipment).

• The DTE (data terminal equipment) is the controlling application. This

can be either an external host or an internal embedded application.

• The DCE (data circuit terminating equipment) is the serial

communication interface of the MS.