Sony Ericsson TT4031 (SE-GM29) CSD (Circuit Switched Data), GPRS (General Packet Radio Service), SMS STATUS REPORT according to GSM 03.40. SMS COMMAND according to GSM

GSM network (for example, traffic reports). This feature is network dependent.SMS STATUS REPORT according to GSM 03.40. SMS COMMAND according to GSM 03.40.

The maximum length of an SMS message is 160 characters when using 7- bit encoding. For 8-bit data, the maximum length is 140 characters. The modem supports up to 6 concatenated messages to extend this function.

2.4.3Voice Calls

The TT4031 (SE-GM29) offers the capability of mobile originated and mobile terminated voice calls, as well as supporting emergency calls. Multiparty, call waiting and call deflection features are available. Some of these features are network-operator specific.

For the inter-connection of audio, the modem offers a balanced 4-wire analogue interface.

DTMF (Dual Tone Multi Frequency) is supported.

2.4.4Data

The modem supports the following data protocols:

GPRS (General Packet Radio Service).

Modems are Class B terminals, which provide simultaneous activation and attachment of GPRS and GSM services. TT4031 (SE-GM29) modems are GPRS class 8 (4+1) enabled devices, which are capable of transmitting in one timeslot per frame (up link), and receiving at a maximum of four timeslots per frame (down link).

CSD (Circuit Switched Data).

TT4031 (SE-GM29) modems are capable of establishing a CSD communication at 9.6 kbps.

HSCSD (High Speed Circuit Switched Data). TT4031 (SE-GM29) supports HSCSD class 2 (2+1) communication, with one timeslot per frame capacity in the up link and two timeslots per frame capacity in the down link.

Owner’s Manual Rev 1.0 Page 19 of 19