FALCOM TANGO55i Guide

THIS DOCUMENT IS AVAILABLE AT HTTP://WWW.FALCOM.DE/
TANGO55/i & 56/i
Hardware description
Version 1.03, 01/12/2005

TANGO55/I & TANGO56/IVERSION 1.03
Table of contents
0INTRODUCTION .........................................................................5
0.1 THE DIFFERENCES BETWEEN TANGO55/I & TANGO56/I MODEMS ............................................ 5
0.2 USED ABBREVIATIONS .............................................................................................................. 7
0.3 RELATED DOCUMENTS ............................................................................................................. 9
1SECURITY ................................................................................10
1.1.1 GENERAL............................................................................................................................ 10
1.1.2 EXPOSURE TO RF ENERGY............................................................................................. 10
1.1.3 EFFICIENT MODEM OPERATION..................................................................................... 10
1.1.4 ANTENNA CARE AND REPLACEMENT............................................................................ 10
1.1.5 DRIVING.............................................................................................................................. 11
1.1.6 ELECTRONIC DEVICES..................................................................................................... 11
1.1.7 VEHICLE ELECTRONIC EQUIPMENT .............................................................................. 11
1.1.8 MEDICAL ELECTRONIC EQUIPMENT.............................................................................. 11
1.1.9 AIRCRAFT........................................................................................................................... 11
1.1.10 CHILDREN........................................................................................................................11
1.1.11 BLASTING AREAS ........................................................................................................... 12
1.1.12 POTENTIALLY EXPLOSIVE ATMOSPHERES................................................................ 12
1.1.13 NON-IONISING RADIATION ............................................................................................ 12
1.2 SAFETY STANDARDS .............................................................................................................. 13
2TECHNICAL DATA ...................................................................14
2.1 TECHNICAL SPECIFICATIONS OF GSM/GPRS ENGINE.............................................................. 14
2.2 POWER CONSUMPTION FOR TANGO55, ONLY ........................................................................ 17
2.3 OPERATING TEMPERATURES................................................................................................... 17
2.4 AIR INTERFACE OF THE TANGO55 GSM/GPRS ENGINE, ONLY............................................... 18
2.5 AIR INTERFACE OF THE TANGO56 GSM/GPRS ENGINE, ONLY............................................... 18
2.6 DETERMINING THE EXTERNAL EQUIPMENT TYPE ..................................................................... 19
3GSM/GPRS APPLICATION INTERFACE ................................20
3.1 DESCRIPTION OF OPERATING MODES ...................................................................................... 20
3.1.1 Normal mode operation ....................................................................................................... 20
3.1.1.1 GSM/GPRS SLEEP ........................................................................................................................ 20
3.1.1.2 GSM IDLE....................................................................................................................................... 20
3.1.1.3 GSM TALK...................................................................................................................................... 20
3.1.1.4 GPRS IDLE..................................................................................................................................... 20
3.1.1.5 GPRS DATA ................................................................................................................................... 20
3.1.2 Power down......................................................................................................................... 21
3.1.3 Alarm mode ......................................................................................................................... 21
4HARDWARE INTERFACES .....................................................22
4.1 INTERFACES ON THE TANGO55/I & TANGO56/I.................................................................... 22
4.1.1 Interface A (4-pin connector, power supply)........................................................................ 22
4.1.2 Interface B (9-pin D-SUB connector)................................................................................... 23
4.1.3 Interface C (8-pin RJ45 connector) ..................................................................................... 23
4.1.4 Interface D (antenna interface)............................................................................................ 24
4.1.5 Interface E (SIM interface)................................................................................................... 24
4.1.6 Interface F (Optical indicator interface) ............................................................................... 25
4.2 FUNCTIONAL DESCRIPTION ..................................................................................................... 25
4.2.1 Ignition line........................................................................................................................... 26
4.2.2 Serial handling..................................................................................................................... 26
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TANGO55/I & TANGO56/IVERSION 1.03
4.2.3 Reset configuration.............................................................................................................. 27
4.2.4 Firmware update.................................................................................................................. 27
4.2.5 Turn off GSM/GPRS engine of the TANGO55/56 modems using AT command................ 27
4.2.6 Maximum number of turn-on/turn-off cycles........................................................................ 28
4.2.7 Automatic GPRS Multislot Class change ............................................................................ 28
5GENERAL GUIDELINES FOR THE USE OF THE
TANGO55/56.............................................................................29
5.1 GETTING STARTED ................................................................................................................. 29
5.2 HARDWARE & SOFTWARE REQUIREMENTS............................................................................... 29
5.2.1 Minimum hardware interface to get started ......................................................................... 29
5.2.1.1 Connecting the external antenna (SMB type) ................................................................................. 29
5.2.1.2 Installing the SIM card..................................................................................................................... 30
5.2.1.3 Mounting the terminal...................................................................................................................... 31
5.2.1.4 Mounting the cradle and placing the terminal.................................................................................. 31
5.2.1.5 Connecting the Modem to external device cable............................................................................. 32
5.2.1.6 Connecting the DC power supply.................................................................................................... 32
5.2.2 Terminal emulator setup...................................................................................................... 33
5.2.2.1 Checking the Modem (using Microsoft Windows™ Hyper Terminal as example) ........................... 33
5.2.3 Getting started to GPRS Network ....................................................................................... 36
5.3 BASIC OPERATION ................................................................................................................. 36
5.3.1 Troubleshooting................................................................................................................... 37
6HOUSING..................................................................................38
6.1 HOUSING OF CRADLE ............................................................................................................. 39
7APPENDIX ................................................................................40
7.1 RECOMMENDATIONS FOR POWER SUPPLY ............................................................................... 40
7.1.1 External cable for power supply .......................................................................................... 40
7.2 POSSIBLE EXTERNAL ANTENNA ............................................................................................... 41
7.3 POSSIBLE EXTERNAL HEADSET ............................................................................................... 41
8HOW TO UPDATE THE NEW FIRMWARE INTO THE
TANGO55/56 MODEMS............................................................42
9RF EXPOSURES ......................................................................45
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TANGO55/I & TANGO56/IVERSION 1.03
Version history:
Version number Author Changes
1.00 F. Beqiri Initial version
1.01 F. Beqiri The GSM LED description in chapter 4.2 updated.
Chapter ” Possible external devices” removed.
1.02 F. Beqiri In chapter 9, the paragraphs "RF Exposure FCC:..." and "Health and Safety
Information FCC:..." removed.
1.03 F. Beqiri Table 5 (chapter 2.5, page 18 ) – The RF Output Power updated with new values.
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TANGO55/I & TANGO56/IVERSION 1.03
Cautions
Information furnished herein “by FALCOM are accurate and reliable. However, no
responsibility is assumed for its use.
Please, read carefully the safety precautions.
If you have any technical questions regarding this document or the product
described in it, please contact your vendor.
General information about FALCOM and its range of products are available at the
following Internet address: http://www.falcom.de/
Trademarks
Some mentioned products are registered trademarks of their respective companies.
Copyright
The TANGO55/56 user’s guide is copyrighted by FALCOM GmbH with all rights
reserved. No part of this documentation may be produced in any form without the
prior written permission of FALCOM GmbH.
FALCOM GmbH.
No patent liability is assumed with respect to the use of the information contained
herein.
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TANGO55/I & TANGO56/IVERSION 1.03
0 INTRODUCTION
TANGO55/i and TANGO56/i are designed for use on any GSM network in the world.
TANGO55/i and TANGO56/i are Tri-Band GSM/GPRS engines that work on three
frequencies GSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz or 850 MHz, DCS 1800
MHz, PCS 1900 MHz, respectively. These full type approved integrated modems
constitute a self contained, fully integrated implementation of the GSM/GPRS.
TANGO55/i and TANGO56/i feature GPRS class B, class 10 (making download at
speeds up to 85 kbps) and support the GPRS coding schemes CS-1, CS-2, CS-3 and
CS-4.
TANGO55/i and TANGO56/i modems incorporate all you need to create high-
performance GSM/GPRS solutions; base band processor, power supply ASIC,
complete radio frequency circuit including a power amplifier, internal and external
SIM interfaces and an antenna interface as well.
The physical interface to the cellular application is made through a RS-232
connector. It consists of 9-pin RS232 interface, required for controlling the unit and
transferring data. They can be directly connected via RS232 interfaces to the serial
port of a desktop or notebook computer. Interfaces for audio signals and applying
power supply are also available.
The external dual band or triple band antenna can directly be connected to the
integrated 50 connector on the modem.
The TANGO55/56 are mobile stations for transmission of voice, data calls and FAX as
well as short messages (SMS - Short Message Service) in GSM Network.
To control the GSM module there is an advanced set of AT commands according to
GSM ETSI (European Telecommunications Standards Institute) 07.07 and 07.05
implemented.
About GPRS:
GPRS is standard for General Packet Radio Service that is an add-on to the GSM
(Global System for Mobile Communications) cellular network - a type of network
used to provide cellular phone service.
When in regions where GPRS is not available, user can still access their important
information with GSM 14.4 kbps data connections.
Users are advised to quickly proceed to the “Security” chapter and read the hints
carefully.
0.1 The differences between TANGO55/i & TANGO56/i
modems
TANGO55 is a Tri-band GSM/GPRS device that operates on three frequencies
GSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz, and is available to use
in the European and Asian Networks.
TANGO55i is also a Tri-band GSM/GPRS device that operates on three frequencies
GSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz, and is available to use
in the European and Asia Networks. The TANGO55i modem provides a
specific software and hardware (internal TCP/IP stack software with
hardware extension) which has been internally implemented for using
the embedded TCP/IP stack software.
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TANGO55/I & TANGO56/IVERSION 1.03
The integration of TCP/IP stack with hardware extension (a TCP/IP-
module added) into the equipment converts it to a stand-alone client
that can be connected to the internet via GPRS network. The modem
can also send and receive data by GSM (set into Command-Mode)
and GPRS network using TCP/IP stack. It supports SMS, DATA and FAX
calls. The TANGO55i modem can be easily controlled by using TCP and
AT commands. The “TCP Command Set” manual is also issued as
separate document and is available on the distributed CD for the
TANGO55i’s users.
TANGO56 is a Tri-band GSM/GPRS device that operates on three frequencies
GSM 900 MHz, DCS 1800 MHz and PCS 1900 MHz, and is available to use
in the European and Asia Networks.
TANGO56i is also a Tri-band GSM/GPRS device that operates on three frequencies
GSM 850 MHz, DCS 1800 MHz and PCS 1900 MHz, and is available to use
in the American Networks. However, the TANGO56i modem contains
1800 MHz GSM functions that is not operational (not allowed for use) in
U.S. Territories. This filing is only applicable for 850MHz GSM/1900 MHz
PCS operations, whereby only these frequencies (850MHz GSM/1900
MHz PCS) are possible to be used in U.S. Territories. The TANGO56i
modem provides a specific soft- and hardware (internal TCP/IP stack
software with hardware extension) which has been internally
implemented for using the embedded TCP/IP stack software.
The integration of TCP/IP stack with hardware extension (a
TCP/IP-module added) into the equipment converts it to a stand-alone
client that can be connected to the internet through any GSM
850/1800/1900 network. The modem can also send and receive data
by GSM (set into the Command-Mode) and GPRS network using TCP/IP
stack. It supports SMS, DATA and FAX calls. The TANGO56i modem can
be easily controlled by using TCP and AT commands. The “TCP
Command Set” manual is also issued as separate document and is
available on the distributed CD for the TANGO56i’s users.
Regarding the electrical interfaces, mechanical specification (dimension, form etc.)
and electrical specification are the same to all modems.
Please note that, according to your requirement you can choose the desired
device.
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0.2 Used abbreviations
Abbreviation Description
AFC Automatic Frequency Control
AGC Automatic Gain Control
AMP Advanced Power Management
ANSI American National Standards Institute
ARFCN Absolute Radio Frequency Channel Number
ARP Antenna Reference Point
B2B Board-to-board connector
BER Bit Error Rate
BTS Base Transceiver Station
CB or CBM Cell Broadcast Message
CE Conformité Européene (European Conformity)
CHAP Challenge Handshake Authentication Protocol
CPU Central Processing Unit
CS Coding Scheme
CSD Circuit Switched Data
CTS Clear to Send
DAC Digital-to-Analog Converter
DAI Digital Audio Interface
dBW Decibel per Watt
dBm0 Digital level, 3.14 dBm0 corresponds to full scale, see ITU G.711, A-law
DCE Data Communication Equipment (typically modems, e.g. XF55-AVL GSM engine)
DCS 1800 Digital Cellular System, also referred to as PCN
DGPS Differential GPS
DOP Dilution of Precision
DRX Discontinuous Reception
DSP Digital Signal Processor
DSR Data Set Ready
DTE Data Terminal Equipment (typically computer, terminal, printer or, for example, GSM application)
DTR Data Terminal Ready
DTX Discontinuous Transmission
EFR Enhanced Full Rate
EGSM Enhanced GSM
EMC Electromagnetic Compatibility
ESD Electrostatic Discharge
ETS European Telecommunication Standard
FCC Federal Communications Commission (U.S.)
FDMA Frequency Division Multiple Access
FR Full Rate
GGA GPS Fixed Data
GMSK Gaussian Minimum Shift Keying
GPRS General Packet Radio Service
GPS Global Positioning System
GSM Global Standard for Mobile Communications
HiZ High Impedance
HR Half Rate
I/O Input/Output
IC Integrated Circuit
IMEI International Mobile Equipment Identity
ISO International Standards Organization
ITU International Telecommunications Union
kbps kbits per second
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TANGO55/I & TANGO56/IVERSION 1.03
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Page 8
Abbreviation Description
LED Light Emitting Diode
Mbps Mbits per second
MMI Man Machine Interface
MO Mobile Originated
MS Mobile Station (GSM engine), also referred to as TE
MSISDN Mobile Station International ISDN number
MSK Minimum Shift Key
MT Mobile Terminated
NTC Negative Temperature Coefficient
OEM Original Equipment Manufacturer
PA Power Amplifier
PAP Password Authentication Protocol
PBCCH Packet Switched Broadcast Control Channel
PCB Printed Circuit Board
PCL Power Control Level
PCM Pulse Code Modulation
PCN Personal Communications Network, also referred to as DCS 1800
PCS Personal Communication System, also referred to as GSM 1900
PDU Protocol Data Unit
PLL Phase Locked Loop
PPP Point-to-point protocol
PRN Pseudo-Random Noise Number. The identity of GPS satellites
PSU Power Supply Unit
R&TTE Radio and Telecommunication Terminal Equipment
RAM Random Access Memory
RF Radio Frequency
RMS Root Mean Square (value)
ROM Read-only Memory
RP Receive Protocol
RTC Real Time Clock
RTCM Radio Technical Commission for Maritime Services
Rx Receive Direction
SA Selective Availability
SAR Specific Absorption Rate
SELV Safety Extra Low Voltage
SIM Subscriber Identification Module
SMS Short Message Service
SRAM Static Random Access Memory
TA Terminal adapter (e.g. GSM engine)
TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
Tx Transmit Direction
UART Universal asynchronous receiver-transmitter
URC Unsolicited Result Code
USSD Unstructured Supplementary Service Data
VSWR Voltage Standing Wave Ratio
WAAS Wide Area Augmentation System
FD SIM fix dialing phonebook
LD SIM last dialing phonebook (list of numbers most recently dialed)
MC Mobile Equipment list of unanswered MT calls (missed calls)
ME Mobile Equipment phonebook
ON Own numbers (MSISDNs) stored on SIM or ME
RC Mobile Equipment list of received calls
SM SIM phonebook

TANGO55/I & TANGO56/IVERSION 1.03
0.3 Related documents
1. TANGO55/56 AT Command Set
2. gprs_startup_user_guide
3. TANGO55i/56i TCP Command Set
4. ETSI GSM 07.05: “Use of Data Terminal Equipment-Data Circuit
terminating Equipment interface for Short Message Service and Cell
Broadcast Service”
5. ETSI GSM 07.07 “AT command set for GSM Mobile Equipment”
6. ITU-T V.25ter “Serial asynchronous automatic dialling and control”
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TANGO55/I & TANGO56/IVERSION 1.03
1 SECURITY
IMPORTANT FOR THE EFFICIENT AND SAFE OPERATION OF YOUR GSM/GPRS MODEM
READ THIS INFORMATION BEFORE USE !
Your GSM/GPRS modem is one of the most exciting and innovative electronic
products ever developed. With it you can stay in contact with your office, your
home, emergency services, and others, wherever service is provided.
1.1.1 GENERAL
Your modem utilises the GSM standard for cellular technology. GSM is a newer radio
frequency (« RF ») technology than the current FM technology that has been used
for radio communications for decades. The GSM standard has been established for
use in the European community and elsewhere.
Your modem is actually a low power radio transmitter and receiver. It sends out and
receives radio frequency energy. When you use Your modem, the cellular system
handling your calls controls both the radio frequency and the power level of your
cellular modem.
1.1.2 EXPOSURE TO RF ENERGY
There has been some public concern about possible health effects of using GSM or
GSM/GPRS modem. Although research on health effects from RF energy has
focused for many years on the current RF technology, scientists have begun
research regarding newer radio technologies, such as GSM. After existing research
had been reviewed, and after compliance to all applicable safety standards had
been tested, it has been concluded that the product is fit for use.
If you are concerned about exposure to RF energy there are things you can do to
minimise exposure. Obviously, limiting the duration of your calls will reduce your
exposure to RF energy. In addition, you can reduce RF exposure by operating your
cellular modem efficiently by following the below guidelines.
1.1.3 EFFICIENT MODEM OPERATION
For Your modem to operate at the lowest power level, consistent with satisfactory
call quality:
If Your modem has an extendible antenna, extend it fully. Some models allow you to
place a call with the antenna retracted. However Your modem operates more
efficiently with the antenna fully extended.
Do not hold the antenna when the modem is « IN USE ». Holding the antenna affects
call quality and may cause the modem to operate at a higher power level than
needed.
1.1.4 ANTENNA CARE AND REPLACEMENT
Do not use the modem with a damaged antenna. If a damaged antenna comes
into contact with the skin, a minor burn may result. Replace a damaged antenna
immediately. Consult your manual to see if you may change the antenna yourself. If
so, use only a manufacturer-approved antenna. Otherwise, have your antenna
repaired by a qualified technician.
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TANGO55/I & TANGO56/IVERSION 1.03
Use only the supplied or approved antenna. Unauthorised antennas, modifications
or attachments could damage the modem and may contravene local RF emission
regulations or invalidate type approval.
1.1.5 DRIVING
Check the laws and regulations on the use of cellular devices in the area where you
drive. Always obey them. Also, when using Your modem while driving, please: give
full attention to driving, pull off the road and park before making or answering a call
if driving conditions so require. When applications are prepared for mobile use they
should fulfil road-safety instructions of the current law!
1.1.6 ELECTRONIC DEVICES
Most electronic equipment, for example in hospitals and motor vehicles is shielded
from RF energy. However RF energy may affect some malfunctioning or improperly
shielded electronic equipment.
1.1.7 VEHICLE ELECTRONIC EQUIPMENT
Check your vehicle manufacturer’s representative to determine if any on board
electronic equipment is adequately shielded from RF energy.
1.1.8 MEDICAL ELECTRONIC EQUIPMENT
Consult the manufacturer of any personal medical devices (such as pacemakers,
hearing aids, etc...) to determine if they are adequately shielded from external RF
energy.
Turn Your modem OFF in health care facilities when any regulations posted in the
area instruct you to do so. Hospitals or health care facilities may be using RF
monitoring equipment.
1.1.9 AIRCRAFT
Turn Your modem OFF before boarding any aircraft.
Use it on the ground only with crew permission.
Do not use in the air.
To prevent possible interference with aircraft systems, Federal Aviation Administration
(FAA) regulations require you to have permission from a crew member to use Your
modem while the plane is on the ground. To prevent interference with cellular
systems, local RF regulations prohibit using Your modem whilst airborne.
1.1.10 CHILDREN
Do not allow children to play with Your modem. It is not a toy. Children could hurt
themselves or others (by poking themselves or others in the eye with the antenna, for
example). Children could damage the modem, or make calls that increase Your
modem bills.
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TANGO55/I & TANGO56/IVERSION 1.03
1.1.11 BLASTING AREAS
To avoid interfering with blasting operations, turn your unit OFF when in a « blasting
area » or in areas posted : « turn off two-way radio ». Construction crew often use
remote control RF devices to set off explosives.
1.1.12 POTENTIALLY EXPLOSIVE ATMOSPHERES
Turn Your modem OFF when in any area with a potentially explosive atmosphere. It is
rare, but Your modem or its accessories could generate sparks. Sparks in such areas
could cause an explosion or fire resulting in bodily injury or even death.
Areas with a potentially explosive atmosphere are often, but not always, clearly
marked. They include fuelling areas such as petrol stations ; below decks on boats ;
fuel or chemical transfer or storage facilities ; and areas where the air contains
chemicals or particles, such as grain, dust, or metal powders.
Do not transport or store flammable gas, liquid, or explosives, in the compartment of
your vehicle which contains Your modem or accessories. Before using Your modem
in a vehicle powered by liquefied petroleum gas (such as propane or butane)
ensure that the vehicle complies with the relevant fire and safety regulations of the
country in which the vehicle is to be used.
1.1.13 NON-IONISING RADIATION
As with other mobile radio transmitting equipment, users are advised that for
satisfactory operation and for the safety of personnel, it is recommended that no
part of the human body be allowed to come too close to the antenna during
operation of the equipment.
The radio equipment shall be connected to the antenna via a non-radiating 50Ohm
coaxial cable.
The antenna shall be mounted in such a position that no part of the human body will
normally rest close to any part of the antenna. It is also recommended to use the
equipment not close to medical devices as for example hearing aids and
pacemakers.
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TANGO55/I & TANGO56/IVERSION 1.03
1.2 Safety standards
THIS CELLULAR MODEM COMPLIES WITH ALL APPLICABLE RF SAFETY STANDARDS.
This cellular modem meets the standards and recommendations for the protection
of public exposure to RF electromagnetic energy established by governmental
bodies and other qualified organisations, such as the following :
Directives of the European Community, Directorate General V in Matters of Radio
Frequency Electromagnetic Energy.
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TANGO55/I & TANGO56/IVERSION 1.03
2 TECHNICAL DATA
2.1 Technical specifications of GSM/GPRS engine
 Power supply:
 Supply voltage 10.8 ... 31.2 V DC ±5 % (see
chapter 2.2 for further details)
 Power saving (GSM):
 Minimizes power consumption in SLEEP mode to
13 mA
 Temperature range:
 Normal operation: - 20 °C to + 55 °C (see
chapter 2.3 for further details)
 Physical characteristics:
 Size: 115.0 ± 0.15 mm x 52.0 ± 0.15 mm x 26.6 ±
0.15 mm (for more details see chapter 6
“Housing”)
 Weight: 82.6 ±2 g (with SMB connector)
88.0 g (with FME connector)
 Dimension of cradle:
 Size: 119.4mm x 66.7mm x 31.8mm(L x B x H)
 Weight: 21 gr
 through 2 screw holes on the cradle
 Mounting:
 Through 2 screw holes on the cradle
 Frequency bands:
 Tri-band (TANGO55/i): EGSM 900, GSM 1800,
GSM 1900
 Tri-band (TANGO56/i): GSM 850, GSM 1800, GSM
1900
 Compliant to GSM Phase 2/2+
 GSM class:
 Small MS
 Transmit power:
 Class 4 (2 W) at EGSM900 (TANGO55/i) GSM 850
(TANGO56/i)
 Class 1 (1 W) at GSM 1800 and GSM 1900
 GPRS connectivity:
 GPRS multi-slot class 10
 GPRS mobile station class B
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TANGO55/I & TANGO56/IVERSION 1.03
 DATA:
GPRS ⇒
 GPRS data downlink transfer: max. 85.6 kbps (see
table 3).
 GPRS data uplink transfer: max. 42.8 kbps (see
table 3).
 Coding scheme: CS-1, CS-2, CS-3 and CS-4.
 TANGO55/56 supports two protocols PAP
(Password Authentication Protocol) and CHAP
(Challenge Handshake Authentication Protocol)
commonly used for PPP connections.
 Support of Packet Switched Broadcast Control
Channel (PBCCH) allows you to benefit from
enhanced GPRS performance when offered by
the network operators.
CSD ⇒
 CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps,
non-transparent, V.110.
 Unstructured Supplementary Services Data
(USSD) support.
WAP ⇒
 WAP compliant.
 SMS:
 MT, MO, CB, Text and PDU mode
 SMS storage: SIM card plus 25 SMS locations in
the mobile equipment
 Transmission of SMS alternatively over CSD or
GPRS. Preferred mode can be user-defined.
 MMS:
 MMS compliant
 FAX:
 Group 3: class 1, class 2
 SIM interface:
 Supported SIM card: 3 V
 Integrated SIM card slot (for small SIM card, only)
 Casing:
 Fully shield (Chromium-plate ABS)
 Temperature control and auto switch-off:
 Constant temperature control prevents damage
to TANGO55/i and TANGO56/i when the
specified temperature is exceeded. When an
emergency call is in progress the automatic
temperature shutdown functionality is
deactivated. (see chapter 2.3 for further details)
 External antenna:
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TANGO55/I & TANGO56/IVERSION 1.03
 Single antenna interface SMB or FME antenna
connector.
 Audio interfaces:
 An analogue audio interface
 Audio features:
 RJ45 serial link (microphone and speaker)
Speech code modes:
 Half Rate (ETS 06.20)
 Full Rate (ETS 06.10)
 Enhanced Full Rate (ETS 06.50/06.60/06.80)
 Adaptive Multi Rate (AMR)
Handsfree operation
 Echo cancellation
 Noise reduction
 One serial interface (RS-232C):
 2.65V level, bi-directional bus for AT commands
and data
 Serial linkfull-featured 8-wire serial interface.
Supports RTS0/CTS0 hardware handshake and
software XON/XOFF flow control. Multiplex ability
according to GSM 07.10 Multiplexer Protocol.
 Baud rate: 300 bps ... 230 kbps on ASC0
 Autobauding detects 1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200, 230400 bps
 Phonebook management:
 Supported phonebook types: SM, FD, LD, MC,
RC, ON, ME
 Ringing tones:
 Offers a choice of 7 different ringing
tones/melodies, easily selectable with AT
command
 Real time clock:
 Implemented
 Timer function:
 Programmable via AT command
 Support of TTY/CTM:
 To benefit from TTY communication via GSM,
CTM equipment can be connected to the audio
interface.
 Software for TANGO55i/56i, only:
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
Page 16
 TCP/IP stack (Internet protocols stack which
handles the Internet's link, network, transport and
application layers). The embedded software

TANGO55/I & TANGO56/IVERSION 1.03
interface that runs on TANGO55i/56i modems for
establishing internet connectivity using IP
commands. TCP/IP software description is also
available, see related documents [3].
Coding scheme 1 Timeslot 2 Timeslots 4 Timeslots
CS-1: 9.05 kbps 18.1 kbps 36.2 kbps
CS-2: 13.4 kbps 26.8 kbps 53.6 kbps
CS-3: 15.6 kbps 31.2 kbps 62.4 kbps
CS-4: 21.4 kbps 42.8 kbps 85.6 kbps
Table 2: Coding schemes and maximum net data rates over air interface
Please note that the values listed above are the maximum ratings which, in practice,
are influenced by a great variety of factors, primarily, for example, traffic variations
and network coverage.
2.2 Power consumption for TANGO55, only
POWER CONSUMPTION
Min Typ. Max Unit Description
GSM/GPRS engine
Supply voltage 10.8 12 31.2 V Voltage must stay within the min/max values, including
voltage drop, ripple and spikes.
Average supply current
60 µA POWER DOWN mode
9 mA SLEEP mode @ DRX = 6
MODE BAND (TANGO55/i, only)
15 mA IDLE mode EGSM 900
15 GSM 1800/1900
250 EGSM 900*)
GSM
170 mA TALK mode GSM 1800/1900**)
15 EGSM 900
15 mA IDLE GPRS GSM 1800/1900
290 EGSM 900*)
220 mA DATA mode GPRS,
(4 Rx, 1 Tx) GSM 1800/1900**)
440 EGSM 900*)
GPRS
310 mA DATA mode GPRS,
(3 Rx, 2 Tx) GSM 1800/1900**)
Peak supply current. 1,6 A Power control level*)
During transmission slot every 4.6 ms.
Table 3: Power supply
*) Power Control Level (PCL 5).
**) Power Control Level (PCL 0).
2.3 Operating temperatures
Parameter Min Typ. Max Unit
Ambient temperature (according to GSM 11.10) -20 25 50 °C
Restricted operation *) -25 to -20 55 to 70 °C
Automatic shutdown
TANGO55/i and TANGO56/i board temperature -29 °C
>70 °C °C
Table 4: Operating temperature
*) TANGO55/i and TANGO56/i work, but deviations from the GSM specification may occur.
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
Page 17

TANGO55/I & TANGO56/IVERSION 1.03
2.4 Air interface of the TANGO55 GSM/GPRS engine, only
Test conditions:
All measurements have been performed at Tamb = 25 °C, VVIN typ. = 12 V DC.
Parameter Min Typ. Max Unit
GSM 900 880 915 MHz
GSM 1800 1710 1785 MHz
Frequency range
Uplink (MS →BTS) GSM 1900 1850 1910 MHz
GSM 900 925 960 MHz
GSM 1800 1805 1880 MHz
Frequency range
Downlink (BTS →MS)
GSM 1900 1930 1990 MHz
GSM 900 31 33 35 dBm
GSM 1800 28 30 32 dBm
RF power @ ARP with 50 Ωload
GSM 1900 28 30 32 dBm
GSM 900 174
GSM 1800 374
Number of carriers
GSM 1900 299 dBm
GSM 900 45 MHz
GSM 1800 95 MHz
Duplex spacing
GSM 1900 80 MHz
Carrier spacing 200 kHz
Multiplex, Duplex TDMA/FTDMA, FDD
Time slots per TDMA frame 8
Frame duration 4.615 ms
Time slot duration 577 µs
GMSK
GSM 900 -102 -107 dBm
GSM 1800 -102 -106 dBm
Modulation
Receiver input sensitivity @ ARP
BER Class II < 2.4 %
GSM 1900 -102 -105.5 dBm
Table 5: Air Interface
2.5 Air interface of the TANGO56 GSM/GPRS engine, only
Test conditions:
All measurements have been performed at Tamb = 25 °C, VVIN typ. = 12 V DC.
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
Page 18
Parameter Frequency
Channel Min Typ. Max Unit
GSM 850 824 849 MHz
GSM 1800 1710 1785 MHz
Frequency range
Uplink (MS →BTS) GSM 1900 1850 1910 MHz
GSM 850 869 894 MHz
GSM 1800 1805 1880 MHz
Frequency range
Downlink (BTS →MS)
GSM 1900 1930 1990 MHz
128 - - 31.51 dBm
188 - - 31.69 dBm
GSM 850
251 - - 31.82 dBm
GSM 1800 - - - - -
512 - - 27.43 dBm
661 - - 27.57 dBm
RF power @ ARP with 50 Ω
load
PCS 1900
810 - - 28.16 dBm
GSM 850 124
GSM 1800 374
Number of carriers
PCS 1900 299 dBm
GSM 850 45 MHz
GSM 1800 95 MHz
Duplex spacing
PCS 1900 80 MHz
Carrier spacing 200 kHz

TANGO55/I & TANGO56/IVERSION 1.03
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
Page 19
Multiplex, Duplex TDMA/FTDMA, FDD
Time slots per TDMA frame 8
Frame duration 4.615 ms
Time slot duration 577 µs
GMSK
GSM 850 -102 -107 dBm
GSM 1800 -102 -106 dBm
Modulation
Receiver input sensitivity @ ARP
BER Class II < 2.4 %
PCS 1900 -102 -105.5 dBm
Table 6: Air Interface
2.6 Determining the External Equipment Type
Before you connect the DB9 serial port connectors on the aforementioned terminals
(DCE units) to external equipment, you need to determine if the external hardware
serial ports are configured as DTE or DCE.
The terms DTE (Data Terminal Equipment) and DCE (Data Communications
Equipment) are typically used to describe serial ports on devices. Computers (PCs)
generally use DTE connectors and communication devices such as modems and
DSU/CSU devices generally use DCE connectors. As a general rule, DTE ports
connect to DCE ports via straight through pinned cables. In other words, a DTE port
never connects directly to another DTE port. Similarly, a DCE port never connects
directly to another DCE port. The signalling definitions were written from the
perspective of the DTE device; therefore, a Receive Data signal becomes an input
to DTE but an output from DCE.
TANGO55/i and TANGO56/i are designed for use as a DCE unit. Based on the
aforementioned conventions for DCE-DTE connections it communicates with the
customer application (DTE) using the following signals:
TANGO55/i and TANGO56/i
Terminal (DCE) to Application (DTE)
TxD ◄----------------------- TXD
RxD -----------------------►RXD
RTS ◄----------------------- RTS
CTS -----------------------►CTS
DTR ◄----------------------- DTR
DSR -----------------------►DSR
DCD -----------------------►DCD
RING -----------------------►RING
Table 7: The signaling definitions between DTE and DCE.