Xircom Redhawk II User Manual

Formerly Omnipoint Technologies, Inc.

Redhawk™ II GSM Wireless Terminal

Users Guide

Redhawk II GSM Modem Users Guide Draft: 10/30/00 2 Part Number: 07100020 version 00B

SAFETY PRECAUTIONS

Important Safety Information

Some of the following informat i on may not apply to all devices described in this manual. However, precautions should be observed when handling any electrical device.

Save this manual, it contains important safety information and operating

instructions. Do not expose the Redhawk II product to open flames.

Care should be taken so that liquids do not spill into the devices.

A qualified electrician should perform all primary connections to AC power.

Do not attempt to disassemble the product. Doing so will void the warranty. With

the exception of Subscriber Identification Modules (SIM), this product does not contain consumer ser v ic eabl e com pon e nts.

Guidelines for Limiting RF Exposure

The Redhawk II products are GS M radio transc ei v ers, which operate under the authority of 47 CF R Part 24, Subpart E of t he FCC Rules and Regulations. When installed and o perated in accordance with the in structions provi ded in this manual , these devices comply with current F CC regulations regarding human exposure to radio frequency - electromagnetic fields.

The following installation and operation restrictions apply to all Redhawk II products: These devic es may only be use d i n fixed and mobile applications

Portable appli cations, as defin ed by the FCC, are prohibited

A separation di st ance of at least 20 c m (7 7/8) inches betw een the antenna a nd

body of the user and other person s m ust be maintained at all times In FIXED applications antenna gain* is limited to a maximum of 7 dBi, with a

correspondi ng equivalent isotropic radiated power (EIRP) of 37 dBm / 5 W In MOBILE applications antenna gain* is limited to a maximum of 3 dBi, with a

correspondi ng equivalent isotropic radiated power (EIRP) of 33 dBm / 3 W Desktop and other uses of these devices where t he antenna can easi l y be relocated

are considered by the FCC to be mobil e applications.

* Antenna gain is defined as gain in dBi (dB referenced to an isotropic radiator) minus cabling loss.

NOTE: Additio nal care must be taken by the installer and/or user of the Redhawk IITM products to ensure proper antenna selection a nd installation. Adherence to the above conditions is necessary to comply with FCC requirement s for safe operation regarding exposure to RF radiation.

Redhawk II GSM Modem Users Guide Draft: 10/30/00 3 Part Number: 07100020 version 00B

Disclaimer

The information and instructions contained within this pu blication com pl y w i th all FCC, NRLT, IM EI and other applic able codes in effe ct at the time of publication. Xircom, Inc. disclaims all responsibility for any act, or breach of law, code or reg ul ation, includi ng local or state codes, performe d by a t hi rd party.

Xircom strongly recommends that all installations, hookups, transmissions, etc. be performed by persons who are exp erienced in the fields of radio frequency technologies. Xircom acknowledges that the i nstallation, s et up and transmissi on guidelines contained within this publication are guidelines, and that each inst al l ation may have v ari ables outside of the guidelin es contained herein. Said variables must be taken into consideration when installing or using the product, and Xircom, Inc. sh al l not be responsible for installati ons or transmissions that fall outside of the parameters set forth in this publication.

Xircom shall not be liable for consequential or incidental damages, injury to any person or property, anticipated or lost profits, l oss of time, or oth er losses incurred by Customer or any thir d party in connection with the installation of the Products or Customer's fail ure to comply with t he i nformation and instruction s contained herein.

Beta Release Notes

Data Services

The current soft w are release does not support transpar ent circuit switched data or Group 3 Fax. These services will be added in subsequent versions.

AT Commands

The current software version does not support all AT commands listed in this document. Please reference the at tached Errata sh eet for a list of the nonfunctioning AT commands. These commands will be added in future software versions.

PUK Procedure

The PUK procedure outlined in this document will be changing.

Redhawk II GSM Modem Users Guide Draft: 10/30/00 4 Part Number: 07100020 version 00B

DECLARATION OF CONFORMITY

Xircom, Inc. of 2300 Corporat e Ce nt e r Drive, Th ousand Oaks, CA 91360 declares that the Xircom Redhawk™ II GSM Radio Module, model 2110-1300 (900/1800) is in conformance w i th all relevant essential requir ements of the European Council Directives listed below:

1999/5/EC Radio and Telecommunicati on s Terminal Equipment Directive

(Following Annex III of this Directive) 89/336/EEC EMC Directive with Amendme nt 92/ 31/EEC and 93/68/EEC 72/23/EEC Low Voltage Directive wi t h Amendment 93/68/EEC

This declarat ion is made based upon complia nce to the followi ng standards:

EN 60950 (1992 w/ A1, 2, 3, 4) Safety of Information Techn ol ogy Equipment,

Including El ect rical Business Equipment

ETS 300 342-1 Edition 2 (June 1997) Radio Equipment and Syst ems (RES);

Electromagnetic Compatibility (EMC) for European digi t al cellular telecommunications system (GSM 900 MHz and DCS 1800 MHz). Part 1: Mobile and portable radio and ancillary equipment.

TBR 19 Edition 3 (October 1996) European digital cell ular telecommunications

system (Phase 2); Attachment requirements for global system for mobile comm unications (GSM) mobile stations; Access

TBR 31 Edition 2 (March 1998) Digital cellular telecommunications system

(Phase 2); Attachment requirements for mobile stations in the D CS 1800 band and additional GSM 900 band; Access

Xircom further declares that all ess ential radio test suites have been carried out. This declaration is made under our sole responsibility.

Authorized Si gnature: ______ ______________ _____________ Date: __________________

R.W. Bass Vice President, O perations Xircom Europe, Middle East, and Africa Veldkant 31 2550 Kontich, Belgium

Redhawk II GSM Modem Users Guide Draft: 10/30/00 5 Part Number: 07100020 version 00B

TABLE OF CONTENTS

REDHAWK™ II GSM WIRELESS TERMINAL

USERS GUIDE

Safety Precautions......................................................................................... 2

Important Safety Information....................................................................... 2

Guidelines for Limiting RF Exposure.............................................................. 2

Disclaimer................................................................................................. 3

Beta Release Notes .................................................................................... 3

DECLARATION OF CONFORMI TY..................................................................... 4

.............................................................................................. 1

.................................................... 1

TABLE OF CONTENTS ................................................................................... 5

Product Overview .......................................................................................... 7

Model Variation ......................................................................................... 7

General Description.................................................................................... 8

Summary of the Features for the Redhawk II Modem....................................... 9

Front Panel ............................................................................................. 10

GSM Overview........................................................................................ 14

Redhawk II Programming Manual................................................................ 15

Backward Compatibility ............................................................................ 15

Modes of Operat ion.................................................................................. 15

Provisioning the SIM..................................................................................... 19

GSM Services Supported by the Redhawk II Modem...................................... 19

Selecting the Modes of Operation............................................................... 19

Antenna Selection........................................................................................ 20

Connector............................................................................................... 20

Antenna Selection.................................................................................... 20

Antenna Selection: Performance Guidelines.................................................. 20

Modem Antenna Location and Network Communication................................. 21

Installation & Initialization ............................................................................. 23

Guidelines for Limiting RF Exposure............................................................ 23

Installation and Verification ....................................................................... 23

SMS Message Verification......................................................................... 30

Final Verifica ti on...................................................................................... 34

Detailed Specifications.................................................................................. 35

Physical Dimensions and Weight ................................................................ 35

Operating Power...................................................................................... 35

Care and Maintenance.............................................................................. 36

Environmental Specifications ......................................................................... 37

Redhawk II GSM Modem Users Guide Draft: 10/30/00 6 Part Number: 07100020 version 00B

Climatic, Operational................................................................................ 37

Repair and return Policy................................................................................ 39

regulations and Compliance........................................................................... 40

GSM Full Type Ap pr oval (FTA)................................................................... 40

FCC notices............................................................................................ 40

CLASS A................................................................................................ 40

CLASS B ................................................................................................ 41

Human Exposure Compliance..................................................................... 41

NRTL / IMEI Approval............................................................................... 42

EMC/Safety Requirements for the Countries of the European Union (EU) .......... 42

EMC/Safety Requirements for Other Countries.............................................. 43

Electromagnetic Compatibility (EMC) and Safety Requirements....................... 43

Glossary And Acr o nyms................................................................................ 45

Appendix A................................................................................................. 48

Installing the Remote Antenna ................................................................... 48

Contacting XIRCOM..................................................................................... 54

Redhawk II GSM Modem Users Guide Draft: 10/30/00 7 Part Number: 07100020 version 00B

PRODUCT OVERVIEW

The Redhawk II Modem is built around the Eagle II™ Data Terminal , a compact, wireless modem that utilizes the international standard Global System for Mobile communications (GSM). The dat a terminal enables low-cost, application-specific, two-way communication and control. It takes f ull ad vantage of GSM capabilit ies such as Subscri ber Identity Modules (SIM), which are "smart cards" that provides numerous advantages.

Over-the-air communication lets the Redhawk II terminal accomplish tasks that previously required on-site visits and offers innovative new service capabilities never before available. In addition, t e rminal authenti cation and dat a encryption ensures a more confide ntial communic ation link betwe en the terminal us er and the data recipient.

Model Variation

Redhawk II modems are available in two config urations: Redhawk II: This modem is GSM only and supports Short message service (SMS),

unstructured supplementary service data (USSD), voice, and circuit switch ed data (transparent and non-transparent mode) up to 9.6 Kbps.

900 MHz & 1800 MHz: Part # 2110-1300

900 MHz & 1900 MHz: Part # 2110-1500

Redhawk IIG: This modem has the same GSM functionality as the Redhawk II with

the addition that it is GPRS hardware ready. It provides GPRS packet data up to and including Class 10, in addition to Short message service (SMS), unstructured

Figure 1: Redh aw k I I Modem

Redhawk II GSM Modem Users Guide Draft: 10/30/00 8 Part Number: 07100020 version 00B

supplementary service data (USSD), voice, and circuit switched data (transparent and non-transparent mode) up t o 9. 6 Kbps.

900 MHz & 1800 MHz: Part # 2210-1300

900 MHz & 1900 MHz: Part # 2210-1500

General Description

The Redhawk II c ontains the Eagle II radio data modu le and a Carrier Board assembly in a aluminum housing. The Eagl e I I radio module provides the GSM ov er t he air radio link and m odem command f unctions. More det ai led information on the Eagle II can be found in the Ea gle II Technical Manual (part # 07100017). The Carri er Board provides DC to DC conversion and standard interface connections wi th drivers for two serial interfaces, a voice interface, and DC power.

Eagle II Terminal

Carrier Board

Figure 2: Redh aw k I I Modem Breakout

The modem operates under a wide range of DC input p ower. (+5V to +28V) Communication is through an RS-232 physical interface, using t he GSM - AT command set. Other unique AT commands are also a v ai lable, provi ding the opportunity to m onitor and report n etwork conditi ons that may be relev ant to the management of multiple deployed terminals. See the Programmers Manual for details on these unique commands.

Redhawk II GSM Modem Users Guide Draft: 10/30/00 9 Part Number: 07100020 version 00B

Summary of the Features for the Redhawk II Modem

Interface

Power

Radio Features

Regulatory

GSM Functionality

SIM International

Mobile Equipment Identity (IMEI)

Primary serial port V.24 protocol, 3 V (5 V tolerant) levels Secondary serial port Secondary 3 V serial port (Any functions other than SMS

messaging requires the development of custom applications)

Voice Supports three vocoder modes: half-rate, full-rate, and enhanced

full-rate (EFR)

Antenna Female SMA

Command protocol AT command set Subscriber Identification Module

(SIM) Electrical power Fixed DC voltage

Peak currents and average power dissipation

Frequency bands GSM 900, DCS 1800, and PCS 1900 capability, depending on

GSM features supported Provides for all GSM authentication, encryption, and frequency

Agency approvals

Mobile-originated and mobile-terminated SMS messages: up to 140 bytes or up to 160 GSM 7bit ASCII characters. Up to 255 messages may be concatenated.

Reception of Cell Broadcast Message

SMS Receipt acknowledgement

Circuit Switched Data (Transparent & Non-transparent fixed at 9.6 Kbps

Voice

Group 3 Fax

Supports GSM Phase 2+

Supports Unstructured Supplementary Service Data (USSD) Not all GSM operators support USSD. For more information, contact Customer Support for the GSM operator.

Redhawk IIG hardware is capable of supporting General Packet Radio Services (GPRS) when configured with optional memory. (GPRS Class B, Multislot Class 10 software will be available at a later date.)

3 V Mini-Subscriber Identity Module (SIM) carrier and interface on board The IMEI allows defective or stolen equipment to be barred from using the GSM network.

The IMEI number is unique to each Redhawk II modem. It reveals the manufacturer, the country of production, and the type approval facility. When the Redhawk II modem is powered on and tries to register with the GSM network, the network pr ovider checks the IMEI. If the IMEI is valid and has not been barred, the Redhawk II modem is allowed to register with the network.

3 V mini-SIM carrier and interface on board

Refer to the Operatin g Power table in the Techn i cal Specifications section for peak currents and average power dissipation for various modes of operation.

the product.

hopping algorithms.

GSM Type Approval

FCC Certification (Part 24)

CE (European Community Certification)

IC (Industry Canada) available

Table 1: Summary of Features

Redhawk II GSM Modem Users Guide Draft: 10/30/00 10 Part Number: 07100020 version 00B

Front Panel

ANT

STATUS

SERIAL 1

Antenna Connector (ANT)

The Redhawk II modem is designed to support interchangeable antenna types, provided that each antenna h as 5 0 -ohm impeda nce and has been t uned to the frequency band intended. It comes standard with a female SMA-type connector.

DC Power (PWR)

The Redhawk II modem requires an inp ut voltage of 5.0 VDC to 28.0 VDC. The input source v oltage ripple should be less than 20% of the average supply voltage peak-to-peak under normal operating conditions.

SIM

MIC/SPKRCTLPW R

Figure 3: Redh aw k I I F ront Panel

The power cable m at i ng connector is a Molex part #43025-0200 (shell ) and #43030-0009 (bag of pins) or #43030-0003 (reel of pins).

PWR

+V (VIN)

-V (GND)

Figure 4: Input Power Connector

Redhawk II GSM Modem Users Guide Draft: 10/30/00 11 Part Number: 07100020 version 00B

Number

1 VIN From CPE Electrical power input to Redhawk II modem:

2 GND From CPE Electrical power return for digital and analog

Signal Name

Direction Functionality

5.0 VDC to 28.0 VDC

grounds.

Table 2: Power C on nector Pin Out

Primary Serial Interface (SERIAL 1)

This serial I/O interface (RS-232) uses a DB-9 connector and supports auto baud capability from 300 bps to 19200 bps with hardware handshake flow control.

Number

1 DCD0_DS To CPE Data Carrier Detec t 0. DCE Output sign al . Active low. Main

Signal Name

Direction Functionality Voltage

3 V serial interface data carrier detect signal. Connects to a DTE, CD, Carrier Detect pin.

Level

2 RX0_DS To CPE Receive data 0. DCE Output s i gnal. Main serial interface

transmit data signal. During idle or reset, signal will be a logic

1. Connects to a DTE, RX, receive data pin.

3 TX0_DS From CPE Transmit data 0. DCE Input signal. Active low. Main serial

interface receive data signal. During idle o r reset, signal will be a logic 1. Connects to a DTE, TX, transmit data pin.

4 DTR0_DS From CPE Data Terminal Ready 0. DCE Input signal. Active low. Main

serial interface data terminal ready signal. Connects to a DTE, DTR, Data Terminal Ready pin.

5 GND_IN From CPE Electrical power return for digital and analog grounds. 6 DSR0_DS To CPE Data Set Ready 0. DCE Output signal. Active low. Main serial

interface data set ready signal. Connects to a DTE, DSR, Data Set Ready pin.

7 RTS0_DS From CPE Request-To-Send 0. DCE Input signal. Active low. Main serial

interface request to send signal. Connects to a DTE, RTS, Request-To-Send pin.

8 CTS0_DS To CPE Clear-To-Send 0. DCE Output signal. Active low. Main serial

interface clear to send s i gnal. Connects to a DTE, CTS, Clear to send pin.

9 RI0_DS To CPE Ring Indicator 0. DCE Output signal. Active low. Main serial

interface ring indicator signal. Connects to a DTE, RI, Ring Indicator pin.

3 V

5 V or

3 V

5 V or

3 V

5 V or

3 V

NOTE: The maximum length for the Primary Serial cable is 50 feet.

Table 3: Primary Serial Connector Pin Out

Redhawk II GSM Modem Users Guide Draft: 10/30/00 12 Part Number: 07100020 version 00B

Secondary Serial Control Interface (CTL)

This serial I/O interfaces (RS-232) that support auto baud capability from 300 bps to 19200 bps.

Connector:

Number

1 GPIO2_RJ To/From CPE General purpose I/O. Used as a general purpose input or output

2 GPIO1_RJ To/From CPE General purpose I/O. Used as general a purpose input or output

3 RX_D From CPE Receive Data 1. DTE Input signal. Secondary serial-interface

4 TX_D To CPE Transmit Data 1. DTE Output signal. Secondary serial-interface

5 GND _RJ To CPE Electrical power return for digital and analog grounds. 6 GPIO0_RJ To/From CPE General purpose I/O. Used as general a purpose input or output

RJ-11

Signal Name

Direction Functionality Voltage

line for monitoring or control of external devices. Requires customized stack softwar e to implement. Leave sig nals disconnected if function is not used.

receive data signal. Used as a debug interface for test purposes. Leave signal disconnected if function is not used.

transmit data signal. Used as a debug interface for test purposes. Leave signal disconnected if function is not used.

line for monitoring or control of external devices. Requires customized stack softwar e to implement. Leave sig nals disconnected if function is not used.

Level

3 V

5 V or

3 V

Table 4: Secondary Seri al Connector Pin Out

NOTE: The maximum length for the Secondary Serial cable is 50 feet .

Voice interface (MIC/SPKR)

Uses an RJ-9 connector and prov i des differential m i crophone inputs and speaker outputs.

Redhawk II GSM Modem Users Guide Draft: 10/30/00 13 Part Number: 07100020 version 00B

Number

1 MIC0N From CPE Microphone Negative. Negative input pin from an electret-type

2 SPK0N To CPE Speaker Negative. Negative output pin. Low side of a push-pull

3 SPK0P To CPE Speaker Positive. Positive output pin. High side of a push-pull

4 MIC0P From CPE Microphone Positive. Positive input pin from an electret-type

Signal Name

Direction Functionality Voltage

microphone. Nominal microphone differential voltage should be

2.0 volts. Impedance not less th an 900 ohms. Leave signal disconnected if function is not used.

amplifier. Speaker impedance 15 oh ms, minimum. Speaker capacitance of 700 pF, maximum. Driver voltage is 4.5 V peak-to-peak. Leave signal disconnected if function is not used.

microphone. Nominal microphone differential voltage should be

2.0 volts. Impedance not less th an 900 ohms. Leave signal disconnected if function is not used.

Table 5: Voice Con n ector Pin Out

Subscriber Interface Module (SIM)

Level

The SIM, an inte gral part of any GSM terminal device, i s programmed with subscriber information. The SIM is not provided with the Redhawk II unit and m ust be provided by t he GSM service subscriber. Care must be taken to prote ct the SIM. A GSM terminal will not operate without the SIM installed.

The user information consists of an identity (IMEI n umber) registered w i th the GSM provider, and a n encryption Ki (pronounced key). T he S I M consists of a microprocess or chip and memory, installed on a pl ast ic card. Redhawk II uses the "mini-SIM" or pl ug in configuration. The SIM, which is removable, slips into a slot on the front of the modem.

The SIM card performs authentication. To gain access to the GSM network, the network must recognize the IMEI number and the term inal must be abl e to properly decrypt the data sent by the network. The SIM also serves as a buffer for Incom ing and Stored SMS m essages, or when a radio link is not available, store an outgoing message unti l a network link is established.

Power must be off w hen installing or re m oving a SIM card.

Status Indication (STATUS)

The Redhawk II m odem provides a mult i -color LED that in di cates the current l i nk status and sig nal quality.

Note:

The LED illuminates any time power is applied to the Redhawk II modem.

Redhawk II GSM Modem Users Guide Draft: 10/30/00 14 Part Number: 07100020 version 00B

LED Color Link Status Signal Quality

Green

Orange

Solid Red

Flashing

GSM Overview

The GSM communications stan dard, already wi del y deployed in Eur ope, Asia, and North America, overcomes many of the drawback s found in other wireless telemetry approaches. The GSM communications network was designed from the ground up, for reliable and inexpensive di gi tal data transfers.

The GSM network (Figure 4) employs integrated data and data-friendly capabilities such as short mes sage services, circuit switched dat a and, soon, GPRS, w hich brings the best of wireless and packet data into harmony and will make new services even more practical and affordable. In many countries around the world, especially in Western Euro pe, GSM-based networks are the onl y digital networks deployed.

Red

Modem is attached to the network

Modem is in Start-up mode or is not attached to the network

Link signal is optimal

Link is less than optimal but is acceptable

Link is unacceptable

Figure 5: Redhawk II terminal deployment in a GSM network

Redhawk II GSM Modem Users Guide Draft: 10/30/00 15 Part Number: 07100020 version 00B

The Redhawk II modem leverages existing public GSM networks, as opposed to other systems that require the utility to build, operate, and maintain expensive private wirele ss networks.

Redhawk II Programming Manual

For greater flexibility that enhances the usability of the Redhawk II Modems, Xircom has provided an AT Command s - Prog rammers Manual. Part #07100014-00A. This manual goes into greater detail, in an easy to read format, on the enhanced programming capabilities specific to the Redhawk II system.

Backward Compatibility

GSM functionality is forever evolving. Subsequently, in order to maintain the highest standards, the Redhawk II modems will be backward compatible with new GSM functionality such as General Packet Radio Service (GPRS). Applications supported with early current versions of the modem will continue to be supported, as GSM technology e v ol ves to GPRS, and then on to third generation tec hnologies, which are now in the process of standardi zation and development.

Modes of Operation

Redhawk II offers several mod es of operation t o address a variety of application requirements.

Circuit Switched Data

Circuit switched data is the most widespread and traditional means of data and voice transmi ssion available today. A circuit switched connect i on occupies one network line for the entire length of data transmission and duri ng this time, no other user may access t his network line. A circuit switched connection i s the optimal means for transmi tting any cont i nuous amount of data, such as vide o transmission or voice.

A common exam pl e of a circuit switched network is the public tele phone system. When person A pi cks up the telepho ne and dials the number of person B, the network determ ines and assigns a path for that transmission. The signal travels through each assigned circuit switch to complete the connection.

Once the signal has reached perso n B, a continuous two-way transmission path has been establi shed. On a long dist ance call, for ex ample, many circuits would nee d to be connected together to make the call possibl e. These circuits are dedicated to the call for the duration of the transm i ssion and cannot be shared by oth er users. This requires substantial network resources to be allocated per user.

Transparent and Non Transparent Transmissions

GSM provides two connection modes of transmission: trans parent and nontransparent. All Redhawk II models support both modes. The transparent data mode delivers a service with a variable error rate, with a guar anteed throughp ut and delay, whereas the non-transparent mode delivers a constantly low forwar d error correction rate, but with a n on-guaranteed throughput or delay.

Redhawk II GSM Modem Users Guide Draft: 10/30/00 16 Part Number: 07100020 version 00B

The non-trans parent service deli v ers the most reli abl e performance a nd is closest to using a modem over a fixed telep hone line. Not all GSM service provid ers support transparent mode. In those cases, the unit switches automatically to non-transparent mode.

Short Message Service

To accommodate smaller messages, GSM uses short message service (SMS) for efficient and timely data transmission and data retrieval. SMS is a point-to-point, storage and fo rw arding, message service that is used in data transmissions such as paging, notification, news flashes, and inf ormation retrieval .

Short messages can carry up to 140 8-bit c ha racters. (160, 7-bit character s available – See Programmers Manual f or configuration)

Short Messages can be sent and received simultaneously with a voice or data call and are sent above the voice or data in the overhead-signaling p ath (Traffic & Bearer).

Although simil ar in concept to tra di tional paging, t he primary differe nce is that SMS is not geographically restricte d a s paging systems are. Moreover, the GSM network stores and resends the message if the receiver’s handset is turned off (In some cases, if a pager is t urned off, the me ssage is simply lost).

Listed below are the essential characteristics and assumptions regarding the form of SMS supported by the Redhawk II family of modems.

Support of both mobile origin ated and mobile t erm inated SMS.

Delivery of message to either designated telephone numbers.

8-bit data

Message Class 1

Message concatenation up to 255 messages (Verify with s ervice provider that

support for this capability is available) Up to 140 ASCII Character per message using 8-bit data mode. ( 160 characters

if 7bit GSM ASCII used) Status report in di cator not sent to SME

More Messages to Send (MMS) configuration.

Validity Period

Service Center Time Stamp

Alert SMS-SC

Priority and Message Waiting

Message Waiting

In addition to t he above, the following importa nt SMS functions are supported:

Redhawk II GSM Modem Users Guide Draft: 10/30/00 17 Part Number: 07100020 version 00B

Submit a SMS TPDU to an SMS-SC, and store a copy of it until either a report arrives from the network or from the network, or a timer expires

Receive a SMS TPDU from an SMS-SC

Return a deliver y report to the network for a previously received message

Receive a report f r o m the network

Notify the network when it has memory capacity available to receive one or

more SMS messa ges after it has previously rejecte d a m essage because i ts memory capacit y w as exceeded

Support for Unstructured Supplementary Services Data

Unstructured S upplementary Services Data (USSD ) is a supplementary service to allow for custom features by GSM ser v i ce providers. Th e m ain distinctio n bet ween USSD and SMS is that the originator is guaranteed a real-time response and acknowledg em ent in USSD, whereas SMS provides no such guar antee.

Put simply, USSD allows the transmission of strings o f characters between the terminal and network in a tran sparent fashion. Both mobile-ini tiated and net w orkinitiated USSD transactions have been standardized in the GSM specifications. Such transactions are normally in the form of a request character string followed by a response charact er strin g.

Voice

In the case of GSM handsets, a valid USSD string is keyed into the handset (e.g., *#1446#) and the SEND key is pres sed.

The characters of the request string are restricted to i nt egers (0-9), has h ( # ) and

star (*). The characters of the response stri ng can be numeric or alphabet character.

USSD may be more appropriate for potential applications where a real-time response is required, su ch as point of sales. The Redhawk II modem supports all forms of USSD, both mobile and network initiated. P l ease note that (U SSD is a GSM supplementary service requiri ng subscription. )

The Redhawk II modem has full voice capabilities, provided the necessary connections have been made for the speaker and microphone pins on the 60-pin I/O connector. The AT commands and their r esponses allow th e user to enter and receive information from the Redhawk II modem. These functions include the ability for dialing, f or providing on-h ook or off-hook, and for controlling other aspects of the voice call interface.

The Redhawk II modem supports three vocoder compression algorithms for voice communication: half-rate, full-rate, and enhanced full-rate (EFR)

+ 37 hidden pages

Xircom Redhawk II User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual