Osaka MTX-63I User manual

MIX Modem - GSM
User Manual V.1.1 Pag. 1
Subject to change without prior notice
MIX MODEM GSM
TERMINAL
Integrators Manual
Powered b CINTERION (Osaka Solutions) WM Modem TC or GSM65 GSM-GPRS
Wireless Modul
e
Intelligent, powerful,
flexible and simple GSM
Terminal in a box

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User Manual V.1.1 Pag. 2
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1. INTRODUCTION 4
1.1 Description ....................................................................................................................... 4
1.2. ORDERING INFORMATION ................................................................................................ 4
Hardware revision: 1.01 .......................................................................................................... 4
Firmware revision: .................................................................................................................. 4
MTX-63I: 01.100 .................................................................................................................... 4
MTX-65I: 01.1001.2 Highlights ................................................................................................. 4
1.2 Highlights ......................................................................................................................... 5
1.3 MTX-63I/65I Wireless modems in a Communication S stem ................................................... 7
1.4 Main Features and Services ................................................................................................ 7
1.4.1 Types of Mobile Station...........................................................................................................................7
1.4.2 Short Message Service.............................................................................................................................8
1.4.3 Voice Calls ..............................................................................................................................................8
1.4.4 Data.........................................................................................................................................................8
1.4.5 GPRS Multi-Slot Support.........................................................................................................................9
1.4.6 Power Consumption ................................................................................................................................9
1.4.7 SIM Card...............................................................................................................................................11
1.5 Precautions .................................................................................................................... 11
2. MECHANICAL DESCRIPTION...................................................................................................................11
2.1 Overview ....................................................................................................................... 11
2.2. Dimensions ................................................................................................................... 12
3. ELECTRICAL DESCRIPTION.....................................................................................................................13
3.1 Power Connector ............................................................................................................ 13
3.2 Audio Connector ............................................................................................................. 15
3.3 Mini USB Connector ......................................................................................................... 18
3.4 Antenna Connector ......................................................................................................... 19
3.5. SIM card reader ............................................................................................................. 19
3.6 MAIN Serial RS232 Interface Port ASC0 .......................................................................... 19
3.7 Expansion I/O port .......................................................................................................... 21
3.7.1. SECONDARY SERIAL RS232 INTERFACE ASC1 .............................................................................. 23
3.7.2. I2C Serial Control Bus.........................................................................................................................23
3.7.3. SPI Bus ONLY MTX-65I.......................................................................................................................24
3.7.4. General Purpose IO (ONLY MTX-65 V3) ............................................................................................ 25
3.7.5. Analog-to-Digital Converter (ADC......................................................................................................26
3.7.6 Real Time Clock ....................................................................................................................................27
3.8. Software Updates ........................................................................................................... 28
4. OPERATION....................................................................................................................................................29
4.1 Switching On the Modem ................................................................................................. 29
4.2 Switching Off the Modem ................................................................................................. 29
4.3 Operating States/LED ...................................................................................................... 29
5. EMBEDDED APPLICATIONS. ONLY MTX-65I .......................................................................................31
6 SAFETY AND PRODUCT CARE...................................................................................................................32
6.1. Safet instructions .......................................................................................................... 32
6.2. General precautions ....................................................................................................... 32
6.3. SIM card precautions ...................................................................................................... 32
6.4. Antenna precautions ....................................................................................................... 33
6.5. Radio Frequenc (RF) exposure and SAR .......................................................................... 33
6.6. Personal Medical Devices ................................................................................................ 33
7. INSTALLATION OF THE MODEM ............................................................................................................34
7.1 Where to install the modem ............................................................................................. 34
7.1.1 Environmental conditions......................................................................................................................34
7.1.2 Signal strength.......................................................................................................................................34
7.1.3 Connections of components to MTX-63I/65I Terminal .........................................................................34
7.1.4 Network and Subscription .....................................................................................................................34

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7.2 How to install the modem ................................................................................................ 34
7.2.1 Power supply.........................................................................................................................................34
7.2.2 Securing the modem ..............................................................................................................................35
7.3 Antenna ......................................................................................................................... 35
7.3.1 General..................................................................................................................................................35
7.3.2 Antenna type..........................................................................................................................................35
7.3.3 Antenna placement ................................................................................................................................35
7.3.4 The antenna cable..................................................................................................................................35
7.3.5 Possible communications disturbances .................................................................................................36
8. ACCESSORIES................................................................................................................................................37
1. POWER SUPPLY ................................................................................................................ 37
1.1 AC Power Adaptor ...................................................................................................................................37
1.2 DC cable...................................................................................................................................................37
2. ANTENNAS ....................................................................................................................... 38
2.1 Magnetic Dual Band Antenna (900/1800MHz)........................................................................................38
2.2 Right angle short antenna.........................................................................................................................38
2.3 Patch Adhesive Antenna...........................................................................................................................38
3. CABLES ........................................................................................................................... 39
3.1 SERIAL CABLE........................................................................................................................................39
3.2 USB CABLE .............................................................................................................................................39
3.3 Expansion port - RS232 2-way Serial Cable ........................................................................................... 39
4. DEVELOPMENT KITs ......................................................................................................... 40
9, CONFORMITY ASSESSMENT......................................................¡ERROR! MARCADOR NO DEFINIDO.
FCC COMPLIANT AND SAR INFORMATION.............................................................................................41
10. ROHS STATEMENT.....................................................................................................................................42
11. DISPOSAL OF OLD ELECTRICAL & ELECTRONIC EQUIPMENT (WEEE MARK)....................42
12. ABBREVIATIONS.........................................................................................................................................43
13. AT COMMAND SUMMARY.......................................................................................................................44
15. SALES CONTACT .........................................................................¡ERROR! MARCADOR NO DEFINIDO.

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1. INTRODUCTION
1.1 Description
The MTX-63I/65I is an intelligent GSM/GPRS control terminal that encapsulates ever thing ou need
for wireless M2M capabilit in one compact unit.
The MIX MODEM GSM in conjunction with JAVA SDK software package can host and control our
wireless application, minimizing the need for extra components.
Alternativel , it can be used as a powerful standalone GPRS modem with its intrinsic TCP/IP stack.
The MTX-63I/65I is a self contained terminal with its own SIM card reader and 3 standard connectors
interfaces, minimizing the need for further hardware development. This terminal can be used as a
powerful and flexible device that can be used in a wide range of telemetr and telematics applications
that rel on the remote exchange of data, voice, SMS or faxes via the GSM cellular network.
As well as providing a standard RS232 serial communication interface the MTX-63I/65I also has an
audio interface allowing an analogue handset to be connected. Also a USB port is included to allow the
connectivit to all relevant PCs and control boards in office and industrial environments. The MIX
MODEM GSM in their expansion port has a wide and useful range of IOs that can be reconfigured to
add functions and features that make our M2M solution both innovative and cost effective.
The MTX-63I/65I can be used to provide a communications link for a variet of wireless applications
including fleet and asset management, vending, securit and alarm monitoring, e-maintenance and
other telemetr applications.
With quad band 900/1800 MHz and 850/1900 MHz, our applications can be used all over the world.
The MIX MODEM GSM incorporates a Cinterion WM MODEM TC module and the MIX MODEM GSM has
a TC65I inside.
Note! Some of the functions described inside this Technical Description are onl possible when the
SIM-Card is inserted
1.2. ORDERING INFORMATION
MTX-65I: 199801116
MTX-63I: 199801115
Hardware revision: 1.01
Firmware revision:
MTX-63I: 01.100
MTX-65I: 01.100

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1.3 Highlights
Interfaces
• FME M 50 Ohm antenna connector
•Expansion Port: 15-wa HD-Dsub: Only for MTX-65I
4 Digital Input/Output
2 Analog Input
1 x I2C/SPI bus
1 x 2-wires RS232 UART
• RS232 - 9 pin D-sub connector for serial interfaces
(ITU-T V.24 protocol)
•USB mini (2.0 Full-Speed End-Point Compliant)
• Operating status LED
• SIM card interface 3 V, 1.8 V with SIM detection
• Plug-in power suppl and on/off interfaces
• Handset audio interface
•VRTC + Alarm
General Features
• Quad-Band GSM 850/900/1800/1900 MHz
• GPRS multi-slot class 12
• GSM release 99
• Output power:
- Class 4 (2 W) for EGSM850 & EGSM900
- Class 1 (1 W) for GSM1800 & GSM1900
• Control via AT commands (Ha es 3GPP TS 27.007 and 27.005)
• SIM Application Toolkit (release 99)
• TCP/IP stack access via AT commands
• Internet Services: TCP, UDP, HTTP, FTP, SMTP, POP3
• Suppl voltage range: 6 ... 30 V
• Power consumption (at 12 V):
- Power down 0,5 mA
- Sleep mode (registered DRX = 5) 29 mA
- Speech mode (average) 184 mA
- GPRS class 12 [Power reduction = 6dB] (average) 330 mA
• Temperature range
- Operation: -30°C to +70°C
- Storage: -40°C to +85°C
• Dimensions. Excluding connectors:78,1 x 66,8 x 37,2 mm
• Weight: < 190 g
GPRS data transmission
• GPRS class 12
• Mobile station class B
• PBCCH support
• Coding schemes CS 1-4
Multiple simultaneous PDP contexts

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CSD data transmission
• Up to 14.4 kbit/s
• V.110
• Non-transparent mode
• USSD support
S ecification for fax
•Group 3, class 1, 2
Voice Features
• Triple-rate codec for HR, FR, and EFR
• Adaptive multi-rate AMR
• Basic hands-free operation
• Echo cancellation
• Noise reduction
Short Message Service (SMS) Features
• Point-to-point MO and MT
• SMS cell broadcast
• Text and PDU mode
Internet Protocols
TCP/UDP/IP protocol stack
Extensive AT command access to TCP/IP stack
Internet Services: TCP, UDP, HTTP, FTP, SMTP, POP3
O en a lication resources (only MTX-65I)
ARM© Core, Blackfin© DSP
• Memor : 400 KB (RAM) and1.7 MB (Flash)
• Improved power-saving modes
Java™ features (only MTX-65I):
• CLDC 1.1 Hl
• J2ME™ profile IMP-NG
• Secure data transmission with HTTPS, SSL and PKI
Over-the-air u date (only MTX-65I)
• Application SW: OTAP
• Firmware: FOTA (OMA compliant)

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1.4 MTX 63I/65I Wireless modems in a Communication System
Figure 1 and Figure 2 illustrate the main blocks of a wireless communication s stem using the wireless
modem. Figure 1 show the communication s stem when a micro-controller is used. The also show the
communication principles of the s stem and the interface between the wireless modem and the
application and Figure 2 shows the communication s stem when the JAVA application is embedded on
the wireless modem. The definitions in the figures, as used elsewhere in this manual, are in
accordance with the recommendations of 3GPP TS 27.007.
The MS (mobile station) represents the wireless modem and SIM card. The wireless modem excluding
SIM card, is known as the ME (mobile equipment).
The DTE (data terminal equipment) is the controlling application. This can be either an external host or
an internal embedded application.
The DCE (data circuit terminating equipment) is the serial communication interface of the MS.
1.5 Main Features and Services
The MTX-63I/65I performs a set of telecom services (TS) according to GSM standard phase 2+, ETSI
and ITU-T. The services and functions of the MTX-63I/65I are implemented b issuing customized
applications embedded on the device, or b AT commands issued internall , or over the RS232 serial
interface.
1.5.1 Ty es of Mobile Station
The MTX-63I/65I is a fully Quad Band capable GSM/GPRS mobile station with the characteristics shown in
the table below.
Figure 1. Main Blocks in a Wireless System (external micro-controller) Figure 2. Main Blocks in a Wireless System (embedded application)

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1.5.2 Short Message Service
The wireless modem supports the following SMS ser ices:
• Sending; MO (mobile-originated) with both PDU (protocol data unit) and text mode supported
• Recei ing; MT (mobile-terminated) with both PDU and text mode supported
• CBM (cell broadcast message); a ser ice in which a message is sent to all subscribers located in one or
more specific cells in the GSM network (for example, traffic reports)
• SMS status report according to 3GPP TS 23.40
The maximum length of a text mode SMS message is 160 characters using 7-bit encoding. The wireless
modem supports up to six concatenated messages to extend this function. Concatenation is performed by
the host application.
1.5.3 Voice Calls
The wireless modem offers the capability of MO (mobile originated) and MT (mobile terminated) oice calls,
as well as supporting emergency calls. Multi-party, call waiting and call di ert features are a ailable. Some
of these features are network operator specific.
For the inter-connection of audio, the wireless modem offers balanced analogue input and output lines. The
wireless modems support HR, FR, EFR and AMR ocoders.
1.5.4 Data
The wireless modem supports the following data protocols:
• GPRS (General Packet Radio Ser ice)
The wireless modem is a Class B terminal. The wireless modem is GPRS multi-slot class10 (4+2)
enabled, capable of recei ing at a maximum of four timeslots per frame (down link), and
transmitting in two timeslots per frame (up link). See section 1.4.5 for multi-slot allocation by class.
• CSD (Circuit Switched Data)
The MTX-63I/65I wireless modem is capable of establishing a CSD communication at 9.6 kbps and
14,4 kbps o er the air.
Feature GSM850 E-GSM900 GSM1800 GSM1900
Frequenc
range (MHz)
Tx 824-849 880-915 1710-1785 1850-1910
Rx 869-894 925-960 1805-1880 1930-1990
RF power @ARP with
50Ω load (t p) 33dBm 33dBm 30dBm 30dBm
Channel spacing 200kHz 200kHz 200kHz 200kHz
Number of channels 124 174 374 299
Number of TD slots 8 8 8 8
Duplex spacing 45MHz 45MHz 95MHz 80MHz
GSM power class 4 (2W) 4 (2W) 1 (1W) 1 (1W)
Modulation GMSK
Receive sensitivit <-102dBm at antenna connector
GPRS multi-slot class Class 12

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1.5.5 GPRS Multi-Slot Su ort
GSM Multi-slot classes supported by MTX-63I/65I
1.5.6 Power Consum tion
The table below briefl summarizes the various operating modes referred to in the following chapters.
Normal operation
GSM / GPRS SLEEP
Various power save modes set with AT+C UN command. Software is active
to minimum extent. If the Terminal was registered to the GSM network in
IDLE mode, it is registered and paging with the BTS in SLEEP mode, too.
Power saving can be chosen at different levels: The NON-CYCLIC SLEEP
mode (AT+C UN=0) disables the AT interface. The CYCLIC SLEEP modes
AT+C UN=7 and 9 alternately activate and deactivate the AT interfaces to
allow permanent access to all AT commands.
GSM IDLE Software is active. Once registered to the GSM network paging with BTS is
carried out. The Terminal is ready to send and receive.
GSM TALK
Connection between two subscribers is in progress. Power consumption
depends on network coverage individual settings, such as DTX off/on,
R/E R/HR, hopping sequences, antenna.
GPRS IDLE
Terminal is ready for GPRS data transfer, but no data is currently sent or
received. Power consumption depends on network settings and GPRS
configuration (e.g. multislot settings).
GPRS DATA
GPRS data transfer in progress. Power consumption depends on network
settings (e.g. power control level), uplink / downlink data rates, GPRS
configuration (e.g. used multislot settings) and reduction of maximum
output power.
POWER DOWN
Normal shutdown after sending the AT^SMSO command, after pressing the ON/O key or after the
activation of the ONO line. The RTC works continuously, but the software is not active. Interfaces are
not accessible.
Airplane mode
Airplane mode shuts down the radio part, causes the Terminal to log off from the GSM/GPRS network
and disables all AT commands whose execution requires a radio connection. Airplane mode can be
controlled by the AT commands AT^SC G and AT+CALA: With AT^SC G= MEopMode/Airplane/OnStart
the Terminal can be configured to enter the Airplane mode each time when switched on or reset. The
parameter AT^SC G=MEopMode/Airplane can be used to switch back and forth between Normal mode
and Airplane mode any time during operation. Setting an alarm time with AT+CALA followed by
AT^SMSO wakes the module up into Airplane mode at the scheduled time.
Multislot
Class
Maximum slot allocation Allowable
Configuration Max data rate
Downlink Uplink Active
8 4 1 5 1 up; 4 down
8-12Kbps Send
32-48Kbps Receive
10 4 2 5
1 up; 4 down
8-12Kbps Send
32-48Kbps Receive
2 up; 3 down
16-24Kbps Send
24-36Kbps Receive
12 4 4 5
1 up 4 down
2 up 3 down
3 up 2 down
4 up 1 down
8-12kpbs per slot

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Average power consumption
Parameter Description Conditions Min Typ Max Unit
POWER Operating oltage for one minute
6 12 30
36
IPOWER
Average supply current (average time 3 min.)
@25°C @ worst case: GSM 900 max power
level
Power Down mode
@8
mA
@12 TBD
@30
SLEEP mode
@8
mA @12 TBD
@30
IDLE mode
@8
mA @12 TBD
@30
TALK mode
@8
mA @12 TBD
@30
Data GPRS 1Tx / 4Rx
@8
mA @12 TBD
@30
Data GPRS 2Tx / 3Rx
(Power reduction = 3dB)
@8
mA @12 TBD
@30
Data GPRS 4Tx / 1Rx
(Power reduction = 6dB)
@8
mA @12 TBD
@30
IPOWER_P
(6)
Peak supply current
during transmission slot
(577µs * No. of Tx every
4.6ms)
Power control level for
Pout max
@8
mA @12 TBD
@30
The power consumption figures shown represent typical a erage current and making different multi-slot
configurations, the worst case being that of two uplink and three downlink slots.
(6) Typical values measured with antenna impedance = 50 Ohm (return loss >20dB)

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1.4.7 SIM Card
The MTX-63I/65I supports an external SIM card through the integrated SIM holder. Both 3V and 1.8V
SIM technolog is supported. Older, 5V SIM technolog is not supported
1.5 Precautions
The MTX-63I/65I as a standalone item is designed for indoor use onl . To use outdoors it must be
integrated into a weatherproof enclosure. Do not exceed the environmental and electrical limits
specified.
2. MECHANICAL DESCRIPTION
2.1 Overview
The pictures below show the mechanical design of the module along with the positions of the different
connectors and mounting holes. The module case is made of durable PC/ABS plastic.
Figure 3. MTX-63I/65IModule viewed from the right side
Figure 4. MTX-63i/65iModule viewed from the left side

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2.2. Dimensions
Figure 5. Dimensions of the MTX-63I/65I terminal in mm

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3. ELECTRICAL DESCRIPTION
All electrical connections to the module are protected in compliance with the standard air and contact
Electrostatic Discharge (ESD).
The module uses the following industr standard connectors:
•D-Sub 9 pin female (Main RS232 serial port)
•High densit 15 pin D-Sub(Secondar RS232 UART and extended I/O interface)
•RJ12 6-wa (power suppl connector)
•RJ12 4-wa (handset connector)
•SIM card reader
•FME male coaxial jack (antenna connector)
3.1 Power Connector
An RJ12 6-wa connector, as shown and described below, serves means of suppl ing and controlling
d.c. power to the modem.
The suppl voltage, VCC, required b the modem is in the range 6-32V d.c. The power suppl has to
be a single voltage source capable of providing a peak during an active transmission. The uplink burst
causes strong ripples (drop) on the power lines.
Application of the suppl voltage does switch the modem on.
Automatic restart after shutdown:
This allow to an application to be alwa s switched on resp. to be able to restart b itself.
The terminal will not need external ignition to be powered up.
The terminal will be powered up 100% time if power is applied. The onl wa to shut down the
terminal is appl ing continuousl positive signal in pin 3 of J1 RJ11 power connector.
The powered up with a RTS Pulse has been removed.
An active-high control signal, TURN_OFF, can be used to switch modem off when continuousl applied,
or can be used to perform hardware reset when applied for > 3.5s.

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Note. VCC and GND are reverse polarit and overvoltage protected.
PIN: ignal Dir Limits Description
1 V Input 6-32 V D Positive power input
2 Not connected -
3 TURN_OFF Input 5 – V
Active high control line used to switch off or
reset the modem
VIH > 5V, VIL < 2V
Power off: ontinuosly
4 TURN_ON Input 5 – V
Internally not connected. Terminal will switch on
automatically.
5 VDDLP I/O Vmax 4,3 V Backup the RT from an external capacitor or a
battery (rechargeable or non-chargeable ).
6 GND Input Negative power (ground)

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3.2 Audio Connector
A 6-wa 4-poles RJ connector, as shown below, allows a telephone handset to be plugged into the
modem, giving access to the microphone and earpiece signals. The connector ma also be used to
drive other analogue audio sub-s stems or devices.
The audio interface provides one analog input for a microphone and one analog output for an
earpiece.
• The microphone input and the earpiece output are balanced.
• For electret microphones a suppl source is implemented.
• The MTX-63I/65I is pre-configured to work with a range of handsets, the audio interface is flexible
and its performance can be configured, using AT commands, to match a particular handset or audio
subs stem.
•Earpiece outputs are short-circuit protected.
Audio handset connection.
Audio signal descriptions are listed below:
Pin Signal Dir Description
0 Not connected
1 MICN I Microphone negative
input
2 EPN O Earpiece negative
output
3 EPP O Earpiece positive
output
4 MICP I Microphone positive
input
5 Not connected

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The electrical characteristics of the voiceband part var with the audio mode. Specifications are listed
in following table. To suit several t pes of audio equipment, three audio modes given b default can be
selected b the AT command AT^SNFS.
The audio mode 1 are optimized for the reference handset (t pe Votronic) connected to the MTX-
63I/65I Terminal, and to ensure that the reference parameters are alwa s within the limits demanded
b the standards the cannot be changed b AT command. Furthermore, the reference parameters are
set as factor default.
In audio mode 4 and 5, the gain in the microphone, earpiece and the side tone path can be adjusted
from the cellular device application b using further AT commands.
Please note that the 2nd audio interface of the MODEM TC/65I module is not connected in the MTX-
63I/65I Terminal. Audio modes 2, 3 and 6 can be selected b setting AT^SAIC=2,1,1,
Mode No AT^ NF = 1 (Default settings,
not adjustable) 4 5
Name Default Handset User Handset Plain odec 1
Purpose Recommended
handset
User provided
handset
Direct access to
speech coder
Gains programmable via AT command NO YES YES
Sidetone YES YES YES
Volume control NO YES YES
Echo control (send) ancellation and
suppression
ancellation and
suppression NO
Noise suppression YES YES NO
MI input signal for 0dBm0 @ 1024 Hz
(at default gain settings) 12.5 mV 12.5 mV 400 mV
Earpiece output signal in mV eff. @
0dBm0, 1024 Hz, no load (at default gain
settings); @ 3.14 dBm0
475 mV 475 mV (default @
max volume) 1.5 V 6.0 Vpp
Sidetone gain (at default settings) 24.9 dB 24.9 dB -∞ dB

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The electrical characteristics are given in the table below.
Function Signal
name
IO Parameter Min. Typ. Max. Unit
Microphone MICP,
MICN
I DC (no load) at MICP 5.3 5.4 5.6 V
DC at MICP in POWER DOWN 0V V
DC (no load) at MICN 0 V
DC Resistance differential MICN, MICP
(balanced)
4.6 4.7 4.8 kOhm
Impedance Zi (balanced) 3.9 4.0 4.1 kOhm
Input level Uimax 0.6 VPP
Restricted Input level Uires 7 1.6 VPP
Gain range 6 dB steps 0 42 dB
Frequenc Range 200 3900 Hz
fine scaling b DSP (inCalibrate) -∞ 0 dB
Earpiece EPP,
EPN
O Impedance (balanced) 8 Ohm
AC output level UO Gain = 0dB @ 3.14
dBm0 no load
5.97 VPP
Gain range -18 0 dB
Gain accurac 0.8 dB
Frequenc area 200 3900 Hz
DC Offset (balanced) 100 mV
Attenuation distortion for 200...3900Hz 1 dB
Out-of-band discrimination 70 dB
LEAudio Length of Audio (Handset) cable 3 m
Unless otherwise stated, all specified values are valid for gain setting (gs) 0dB and 1kHz test signal.
gs = 0dB means audio mode = 5, inBbcGain= 0, inCalibrate = 32767, outBbcGain = 0, OutCalibrate =
16384, sideTone = 0.
The electrical characteristics of the voiceband part depend on the current audio mode selected b the
AT command AT^SNFS. See Table 9: Audio modes.
The audio modes 4 and 5 can be adjusted b parameters. Each audio mode is assigned a separate
parameter set.

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Audio Parameters Adjustable b AT Commands
Parameter
Influence to
Range
Gain
range
Calculation
inBbcGain MICP/MICN analog amplifier
gain of baseband controller
before ADC
0...7 0...42dB 6dB steps
inCalibrate digital attenuation of input
signal after ADC
0...32767 -∞...0dB 20 * log
(inCalibrate/
32768)
outBbcGain EPP/EPN analog output gain of
baseband controller after DAC
0...3 0...-18dB 6dB steps
outCalibrate[n]
n = 0...4
Digital attenuation of output
signal after speech decoder,
before summation of sidetone
and DAC present for each
volume step[n]
0...32767 -∞...+6dB 20 * log (2 *
outCalibrate[n]/
32768)
sideTone Digital attenuation of sidetone is
corrected internall b
outBbcGain to obtain a constant
sidetone independentl to
output volume
0...32767 -∞...0dB 20 * log
(sideTone/
32768)
3.3 Mini USB Connector
TC65 supports a USB 2.0 Full Speed (12Mbit/s) device interface. The USB interface is primaril
intended for use as command and data interface and for downloading firmware. The USB I/O pins are
capable of driving the signal at min 3.0V. The are 5V I/O compliant.
The USB port has different functions depending on whether or not Java is running. Under Java, the
lines ma be used for debugging purposes (see [16] for further detail). If Java is not used, the USB
interface is available as a command and data interface and for downloading firmware.
The USB I/O-pins are capable of driving the signal at min 3.0V. The are 5V I/O compliant. To properl
connect the module’s USB interface to the host a USB 2.0 compatible connector is required.
Furthermore, the USB modem driver delivered with MIX MODEM GSM must be installed as described
below.
The USB host is responsible for suppl ing, across the VUSB_IN line, power to the module’s USB
interface, and all the other MTX-65i interfaces. This is because MTX-65i is designed as a self powered
device compliant with the “Universal Serial Bus Specification Revision 2.0”

MIX Modem - GSM
User Manual V.1.1 Pag. 19
Subject to change without prior notice
3.4 Antenna Connector
The antenna connector allows transmission of radio frequenc (RF) signals between the modem and
an external customer-supplied antenna. The modem is fitted with a 50Ω, FME male coaxial jack.
The external antenna must be matched properl to achieve best performance regarding radiated
power, DC-power consumption, modulation accurac and harmonic suppression.
3.5. SIM card reader
The MTX-63I/65I Terminal is fitted with a SIM card reader designed for 1.8V and 3V SIM cards. It is
the flip-up t pe which is lockable in the horizontal position and is accessed through a removable panel
as shown below.
The card holder is a five wire interface according to GSM 11.11. A sixth pin has been added to detect
whether or not the SIM card drawer is inserted.
Removing and inserting the SIM card during operation requires the software to be reinitialized.
Therefore, alter reinserting the SIM card it is necessar to restart MTX65I Terminal.
The full operation of the MTX-63I/65I relies on a SIM card being inserted. Some MTX-63I/65I
functionalit ma be lost if ou tr to operate the control terminal without a SIM card
3.6 MAIN Serial RS232 Interface Port ASC0
The modem supports a standard RS232 serial interface (EIA/TIA 574) via its 9 pin Sub-D connector,
shown below.

MIX Modem - GSM
User Manual V.1.1 Pag. 20
Subject to change without prior notice
MTX-63I/65I Terminal is designed for use as a DCE. (data circuit-terminating equipment) based on the
conventions for DCE-DTE connections it communicates with the customer application (DTE- data
terminating equipment) using the following signals:
• Port TxD @ application sends data to TXD of MTX-63I/65I Terminal
• Port RxD @ application receives data from RXD of MTX-63I/65I Terminal
The RS-232 interface is implemented as a serial as nchronous transmitter and receiver conforming to
ITU-T V.24 Interchange Circuits DCE. It is configured for 8 data bits, no parit and 1 stop bit and can
be operated at fixed bit rates from 300bps to 460,800bps.
Autobauding supports bit rates from 1,2bps to 460,800bps. Hardware handshake using the /RTS and
/CTS signals and XON/XOFF software flow control are supported.
In addition the modem control signals DTR, DSR, DCD and RING are available. The MODEM control
signal RING (Ring Indication) can be used to indicate, to the cellular device application, that a call or
Unsolicited Result Code (URC) is received.
The electrical characteristics of the serial port signals are shown below:
Note: Outputs at 3kOhm load
Pin Signal Dir Voltage
levels
Description
1 DCD O Min ±5V Data carrier detect
2 RD 0 O Min ±5V Received data
3 TD 0 I
VILmax = 0.6V
VIHmin = 2.4V
VImax = ±25V
Transmitted data
4 DTR I
VILmax = 0.6V
VIHmin = 2.4V
VImax = ±25V
Data terminal read
5 GND - 0V Ground connection
6 DSR O Min ±5V Data set read
7 RTS I
VILmax = 0.6V
VIHmin = 2.4V
VImax = ±25V
Request to send
8 CTS O Min ±5V Clear to send
9 RI O Min ±5V Ring indicator