2.12.6 Local security management........................................................................................................... 17
2.12.7 Call control ..................................................................................................................................... 18
2.14.1 Reset signal ................................................................................................................................... 19
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
DISCLAIMER
The information contained in this document is the proprietary information of Telit Communications
S.p.A. and its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other
than the officers, employees, agents or subcontractors of the owner or licensee of this document,
without the prior written consent of Telit, is strictly prohibited.
Telit makes every effort to ensure the quality of the information it makes available. Notwithstanding the
foregoing, Telit does not make any warranty as to the information contained herein, and does not
accept any liability for any injury, loss or damage of any kind incurred by use of or reliance upon the
information.
Telit disclaims any and all responsibility for the application of the devices characterized in this
document, and notes that the application of the device must comply with the safety standards of the
applicable country, and where applicable, with the relevant wiring rules.
Telit reserves the right to make modifications, additions and deletions to this document due to
typographical errors, inaccurate information, or improvements to programs and/or equipment at any
time and without notice. Such changes will, nevertheless be incorporated into new editions of this
document.
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
1 Overview
The GM862 family consist of the following modules: the GM862-GPS, GM862-QUAD-PY and GM862-QUAD,
which combine the access to digital communication services in GSM 850, 900, DCS 1800, PCS1900
MHz networks with an additional key feature of the integrated GPS receiver (GM862-GPS only).
The Telit GM862-GPS includes a 20 channels GPS receiver. It provides all the features of the GM862-
QUAD version such as Voice, Circuit Switched Data transfer, Phonebook, SMS, four bands GSM
capability, hot removal sensing on board SIM Reader, GPRS Class 10 and battery charger circuitry.
Moreover, the GM862-GPS and GM862-QUAD-PY models, integrate the “EASY SCRIPT “ functionality.
This is a PYTHON engine script interpreter allowing self-controlled operations. With the EASY
SCRIPT feature the GM862-GPS and GM862-QUAD-PY become a finite product, they just need your script
to be run.
The GM862 is specifically designed and developed by Telit for OEM usage and dedicated to portable
data, voice and telematic applications, such as:
Moreover, for the GM862-GPS:
All three models supports the following functionalities:
• Telemetry and Telecontrol
• Security systems
• Vending Machines
• POS terminals
• Phones and Payphones
• Return channel for digital broadcasting
• Applications, where the external application processor can be replaced by the
PYTHON engine provide by GM862-GPS or GM862-QUAD-PY
• JAMMING DETECT & REPORT (detect the presence of disturbing devices
• CMUX
• SAP (SIM Access Profile)
• Multisocket
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
From the interface point of view, the GM862-GPS, GM862-QUAD-PY and GM862-QUAD provide the following
features:
•Full RS232 UART, CMOS level (ASC0) interface for AT commands:
- Auto-bauding from 2.4 up to 57.6 Kbps
- Fixed baud rate up to 115.2 Kbps
• Two wires RS232, CMOS level (ASC1) for PYTHON debug
• SIM card interface, 3 volts and 1.8 volts
• 13 x GPIO ports (max)
• 1 x A/D converters
• 1 x buzzer output
• 1 x led status output indicator
In order to meet the competitive OEM and vertical market stringent requirements, Telit supports its
customers with a dedicated Technical Support Policy with:
• TelitEvaluation Kit EVK2 to help you to develop your application;
• a Website with all updated information available;
• a high level technical support to assist you in your development;
For more updated information concerning product Roadmap and availability, technical characteristics,
commercial and other issues, please check on the Telit website www.telit.com
> Products > Modules.
NOTE: Some of the performances of the Telit GM862 modules depend on the SW version installed on
the module itself.
The Telit GM862 SW group is continuously working in order to add new features and improve the overall
performances.
The Telit GM862 modules are easily upgradeable by the developer using the Telit GM862 module Flash
Programmer.
Furthermore, all the Telit GM862 products have the full conformity assessment against R&TTE.
Telit
GM862 Module Pin-to-Pin Upgrade Policywill enable you to include in your application the new and
future products of the GM862 family, allowing you to save your investments and to successfully
penetrate new markets.
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2 General Product Description
2.1 Dimensions
The Telit GM862-QUAD-PY and GM862-QUAD modules overall dimension are:
• Length: 43.9 mm
• Width: 43.9 mm
• Thickness: 6.9 mm
• Volume: ≅ 13 cm
The layout is shown in the following figure:
3
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r
80272ST10019a Rev. 10 – 18/09/2008
The layout of Telit GM862 GPS module is shown in the following figure:
GM862 Product Description
2.2 Weight
The Telit GM862 Family modules weight is:
product weight (gr)
GM862-QUAD/QUAD-PY 18
GM862-GPS 19
GPS antenna connecto
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2.3 Environmental requirements
The Telit GM862 modules are compliant with the applicable ETSI reference documentation GSM 05.05
Release1999 ETSI EN300910 V8.4.1
2.3.1 Temperature range
Operation
temperature range
Storage and non
Operating
Temperature Range
(*) Functional: the module is able to make and receive voice calls, data calls, SMS and make GPRS traffic
GM862-QUAD /
GM862-QUAD-PY
GM862-GPS Note
–20°C ÷ +55°C –20°C ÷ +55°C
–40°C ÷ +85°C –40°C ÷ +85°C
–40°C ÷ +85°C –40°C ÷ +85°C
The module is fully functional (*) in
all the temperature range, and it
fully meets the ETSI specifications.
The module is fully functional (*) in
all the temperature range.
Temperatures outside the range -
20°C ÷ +55°C, might slightly
deviate from ETSI specifications.
.
2.3.2 Vibration Test (non functional)
• 10 ÷12Hz ASD = 1.92m 2 /s 3
• 12 ÷ 150Hz –3dB/oct
2.3.3 RoHS compliance
The GM862-QUAD /QUAD-PY and GM862-GPS are fully RoHS compliant to EU regulation.
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2.4 Operating Frequency
The operating frequencies in GSM, DCS, PCS modes are conform to the GSM specifications.
The Telit GM862 modules in GSM–850 / 900 operating mode are of class 4 in accordance with the
specification which determine the nominal 2W peak RF power (+33dBm) on 50 Ohm.
DCS–1800 / PCS–1900
The Telit GM862 modules in DCS–1800/PCS–1900 operating mode are of class 1 in accordance with
the specifications, which determine the nominal 1W peak RF power (+30dBm) on 50 Ohm.
2.6 Reference sensitivity
GSM–850 / 900
The sensitivity of the Telit GM862 modules according to the specifications for the class 4 GSM–850/900
portable terminals is –107 dBm typical in normal operating conditions.
DCS–1800 / PCS-1900
The sensitivity of the Telit GM862 modules according to the specifications for the class 1 portable
terminals DCS-1800 / PCS-1900 is –106 dBm typical in normal operating conditions.
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2.7 Antennas
GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2.7.1 GSM Antenna
The antenna that the customer chooses to use, should fulfill the following requirements:
Frequency range
Bandwidth
For further information please refer to the GM862 Hardware User Guide.
Depending by frequency band(s) provided by the network
operator, the customer shall use the most suitable antenna
for that/those band(s)
80 MHz in EGSM 900, 70 MHz if GSM 850, 170 MHz in DCS,
140 MHz PCS band
2.7.2 GPS Antenna1
The Telit GM862-GPS Transceiver module includes a 50 Ohm MMCX connector for the GPS antenna.
Frequency range
Bandwidth
For further information please refer to the GM862 Hardware User Guide.
GPS L1 (1575.42 MHz)
+-1.023 MHz
1
GM862-GPS only
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2.8 GPS Module features
The GM862-GPS includes a SiRFstarIII™ single chip GPS receiver, that supports real-time location in
urban area and wherever a high sensitivity acquisition is needed. As main features of such GPS
receiver, we can mention:
• High sensitivity for indoor reception, up to -159dBm (with active antenna)
• Extremely fast TTFF’s at low signal levels
• Hot starts < 3 seconds
• 200,000+ effective correlators
• Supports 20-Channel GPS L1 1575.42 MHz
• Accuracy < 2.5m
• Extremely fast TTFF’s at low signal levels
• GPS NMEA 0183 output format
• Date WGS-84
• Dedicated GPS AT commands
• SBAS (WAAS and EGNOS) support
4
•Low power consumption
2
2.8.1 GPS Specifications
2.8.1.1 GPS Sensitivity
Time to first fix
Hot start
Warm start
Cold start
Tracking
2.8.1.2 GPS Average Power Consumption
The typical current consumption of the GPS part of the Telit GM862-GPS modules is:
2
Available for the P/N: 3 990 250 689
3
NOTE: sensitivity is affected by the type of active GPS antenna used in the application.
Autonomous <3s
Autonomous <35s
Autonomous <35s
Sensitivity3
up to -159 dBm
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
GM862-GPS (3990250657) GM862-GPS4 (3990250689)
Operating current
70 mA ±20%, including 50 mA
for the GPS hardware and 20
mA for the antenna LNA
55mA, including 35mA GPS for
the GPS hardware and 20 mA
for the antenna LNA
2.8.1.3 GPS Driving
The GPS functions are driven from the GSM BB processor trough a dedicated AT command set
available in a separately specification.
2.8.1.4 GPS NMEA
The GPS data stream (NMEA 0183 format) is also available on the connector (pins 35 and 41 :
TX_GPS and RX_GPS) in RS232 format 8N1, 4800 bps (9600, 19200, 38400, and 57600 bps are
available too).
2.8.1.5 NMEA sentences
The following GPS sentences are available:
GGA - Global positioning system fix data (provides 3D location and accuracy data)
– Course over ground and ground speed
VTG
GSA
- GPS DOP and active satellites
RMC
- Recommended Minimum Specific GPS Data
GLL
- Geographic Latitude and Longitude
2.9 Supply voltage
The external power supply must be connected to VBATT signal (see Hardware User Guide) and must
fulfil the following requirements:
POWER SUPPLY
Nominal Supply Voltage 3.8 V 3.8 V
Max Supply Voltage 4.2 V 4.5 V
Supply voltage range 3.4 V - 4.2 V 3.22 V – 4.5 V
4
Operating current consumption has decreased for 30%
SW rel. 7.02.xx4 or
older
SW rel. 7.03.x00 or
newer
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
NOTE: Operating voltage range must never be exceeded; min/max voltage requirements and peak
current supply should be fulfilled.
2.10 GSM Power consumption
The typical current consumption of the Telit GM862 Family modules are:
Power off current (typical)
< 26 μA;
Stand–by current (GSM Idle)
Operating current in voice channel
Operating current in GPRS class 10
The total power consumption of GM862-GPS is the sum of the consumptions of GSM and GPS part.
< 17 mA (< 4 mA using command AT+CFUN)
< 200 mA @ worst network conditions
< 370 mA @ worst network conditions
2.11 Embodied Battery Charger
The battery charger is suited for 3.7V Li-Ion rechargeable battery (suggested capacity 500-1000mAH).
The Charger needs only a CURRENT LIMITED power source input and charges the battery directly
through VBATT connector pins.
Battery charger input pin
Battery pins
Battery charger input voltage min
Battery charger input voltage typical
Battery charger input voltage max
Battery charger input current max
Battery type
NOTE: If embodied battery charger is used, then a LOW ESR capacitor of at least 100μF must be
mounted in parallel to VBATT pin.
NOTE: when power is supplied to the CHARGE pin, a battery must always be connected to the
VBATT pins.
CHARGE
VBATT, GND
5.0 V
5.5 V
7.0 V
400mA
Li-Ion rechargeable
2.12 User Interface
The user interface is managed by AT commands specified on the ITU-T V.250, GSM 07.07 and 07.05
specification.
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2.12.1 Speech Coding
The Telit GM862 voice codec supports the following rates:
• Half Rate.
• Full rate,
• Enhanced Full Rate
• Adaptive Multi Rate
2.12.2 SIM Reader
The Telit GM862-QUAD, GM862-QUAD-PY and GM862-GPS support phase 2 GSM11.14 - SIM 1.8V and 3V.
For 5V SIM operation an external level translator can be added.
The Telit GM862-QUAD,QUAD-PY and GPS have an internal built-in SIM card reader that allows also hot
removal of the SIM sensing. Therefore, the SIM can be extracted and reinserted while the module is
still on, so there's no need for an external SIM housing.
NOTE: the hot removal of the SIM sensing is not supported during power saving mode (+CFUN: 5).
2.12.3 SMS
The Telit GM862 Family modules supports the following SMS types:
• Mobile Terminated (MT) class 0 – 3 with signalling of new incoming SMS, SIM full, SMS read
• Mobile Originated class 0 – 3 with writing, memorize in SIM and sending
• Cell Broadcast compatible with CB DRX with signalling of new incoming SMS.
2.12.4 Real Time Clock and Alarm
The Telit GM862 Family modules supports the Real Time Clock and Alarm functions through AT
commands, furthermore an alarm output pin (GPIO6) can be configured to indicate the alarm with a
hardware line output.
2.12.5 Data/fax transmission
As for the data and fax capabilities, the GM862-QUAD,QUAD-PY and GPS support the following:
GPRS Class 8, MS Class 8
GPRS Class 10, MS Class 8.
CSD up to 14.4 Kbps
Fax service, Class 1 Group 3
GM862-QUAD GM862-QUAD-PY GM862-GPS
• • •
• • •
• • •
• • •
2.12.6 Local security management
With lock of Subscriber Identity module (SIM), and security code request at power–up.
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GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
2.12.7 Call control
Call cost control function.
2.12.8 Phonebook
Function available to store the telephone numbers in SIM memory.
Capability depends on SIM version/memory
2.12.9 Characters management
The GM862 supports the IRA characters set (International Reference Alphabet), in TEXT and PDU
mode.
2.12.10 SIM related functions
The activation and deactivation of the numbers stored in phone book are supported, FDN, ADN and
PINs too. The extension at the PIN2 for the PUK2 insertion capability for lock condition is supported
too.
2.12.11 Call status indication
The call status indication by AT commands is supported.
2.12.12 Automatic answer (Voice, Data or FAX)
After a specified number of rings, the module will automatically answer. The user can set the number
of rings by means of the command ATS0=<n>.
2.12.13 Supplementary services (SS)
• Call Barring,
• Call Forwarding,
• Calling Line Identification Presentation (CLIP),
• Calling Line Identification Restriction (CLIR),
• Call Waiting, other party call Waiting Indication,
• Call Hold, other party Hold / Retrieved Indication,
• Closed User Group supplementary service (CUG),
• Advice of Charge,
• Unstructured SS Mobile Originated (MO)
2.12.14 Acoustic signaling
The acoustic signalling of the GM862 on the selected acoustic device are the following:
• Call waiting;
• Ringing tone;
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