User's Manual

Eagle II GSM Radio Module Technical Manual Preliminary Draft: 08/31/00 21

Part Number: 07100017 version 00.04

All trademarks and copyrights are the property of Xircom, Inc.

SMS: Short Message Services

Short Message Services (SMS) is a feature-rich GSM service. The Eagle II module can

perform the following tasks:

Sending and receiving text messages of up to 160 characters (7-bit characters)

Sending and receiving binary messages of up to 140 bytes (8-bit data)

Submitting a SMS Protocol Data Unit (PDU) to a SMSC (Short Message Service

Center) and storing a copy of the PDU until either a report arrives from the network or

a timer expires

Receiving a SMS PDU from a SMSC

Returning a delivery report to the network for a previously received message

Receiving a report from the network

Notifying the network when the module has sufficient memory capacity available to

receive one or more SMS messages (after the module had previously rejected a

message because its memory capacity was exceeded)

SMS Features Supported by the Eagle II Module

The following list details the key characteristics and assumptions regarding the form of

SMS supported in the Eagle II module.

Supports both mobile-originated (MO) and mobile-terminated (MT) SMS

Delivers the message to a telephone

Supports 8-bit data

Supports Message Class 1

Supports the concatenation of up to 255 messages

Provides a status report indicator

Supports the More Messages to Send (MMS) feature

Allows the definition of a validity period

Provides the Service Center Time Stamp

Alerts the SMSC

Supports Priority

Supports Message Waiting

GPRS (Future/Optional)

General Packet Radio Service (GPRS)

GPRS is the next step in GSM data services: a fully packet-based protocol service with

direct access to the Internet. By bringing the best features of messaging, circuit-switched

services, and packet data into harmony, GPRS promises to make new applications even

more practical and affordable. Future releases of the Eagle II module will support GPRS

mode. Currently, the Eagle II module is hardware-ready for GPRS, if the optional memory

upgrade is installed.