Sony Ericsson GTR-64 manual Main Features and Services, Types of Mobile Station, Gmsk, Voice Calls

GTR64 http://www.matrix.es/GTR64

1.4 Main Features and Services

The GTR64 performs a set of telecom services (TS) according to GSM standard phase 2+, ETSI and ITU- T. The services and functions of the GTR64 are implemented by issuing customised applications embedded on the device, or by AT commands issued internally, or over the RS232 serial interface.

1.4.1 Types of Mobile Station

The GTR64 is a a fully Quad Band capable GSM/GPRS mobile station with the characteristics shown in the table below.

Feature		GSM850	E-GSM900	GSM1800	GSM1900
Frequency	Tx	824-849	880-915	1710-1785	1850-1910
range (MHz)	Rx	869-894	925-960	1805-1880	1930-1990
Channel spacing		200kHz	200kHz	200kHz	200kHz
Number of channels		124	174	374	299
Number of TD slots		8	8	8	8
Duplex spacing		45MHz	45MHz	95MHz	80MHz
GSM power class		4 (2W)	4 (2W)	1 (1W)	1 (1W)
Modulation			GMSK
Receive sensitivity			<-102dBm at antenna connector
GPRS multi-slot class			Class 10

1.4.2 Short Message Service

The wireless modem supports the following SMS services:

•Sending; MO (mobile-originated) with both PDU (protocol data unit) and textvmode supported

•Receiving; MT (mobile-terminated) with both PDU and text mode supported

•CBM (cell broadcast message); a service in which a message is sent to all subscribers located in one or more specific cells in the GSM network (for example, traffic reports)

•SMS status report according to 3GPP TS 23.40

The maximum length of a text mode SMS message is 160 characters using 7-bit encoding. The wireless modem supports up to six concatenated messages to extend this function. Concatenation is performed by the host application.

1.4.3 Voice Calls

The wireless modem offers the capability of MO (mobile originated) and MT (mobile terminated) voice calls, as well as supporting emergency calls. Multi-party, call waiting and call divert features are available. Some of these features are network operator specific.

For the inter-connection of audio, the wireless modem offers balanced analogue input and output lines. The wireless modems support HR, FR, EFR and AMR vocoders.

GTR64 Integrators Manual V.1.2 Pag. 9 Preliminary. Subject to change without prior notice