Multitech MT-SMI-DK Development Manual
Universal Socket
MT-SMI-DK Developer Guide
LEGAL NOTICES AND CONTACT INFORMATION
Universal Socket Developer Guide
2
Universal SocketModem Developer Guide
Cellular SocketModems
MTSMC-G2
MTSMC-G3
MTSMC-H5
MTSMC-C1
MTSMC-C2
MTSMC-LEU1
MTSMC-H3
MTSMC-EV3
MTSMC-LAT1
MTSMC-EV2
MTSMC-E1
MTSMC-LVW2
Analog SocketModems
MT9234SMI
MT5692SMI
MT2492SMI
Embedded Device Servers
MT100SEM-IP
MTS2BTSMI
S000342, Version V
Use Rev S for all builds of the following devices. Consult model specific Device Guides for build options. If you have a older SocketModem, contact
Multi-Tech for documentation.
Copyright
This publication may not be reproduced, in whole or in part, without the specific and express prior written permission signed by an executive officer of
Multi-Tech Systems, Inc. All rights reserved. Copyright © 2017 by Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties, whether express, implied or by estoppels, with respect to the content, information,
material and recommendations herein and specifically disclaims any implied warranties of merchantability, fitness for any particular purpose and noninfringement.
Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of
Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.
Trademarks
Multi Tech, SocketModem, SocketWireless, Universal IP, SocketEthernet IP and the Multi-Tech logo are registered trademarks of Multi-Tech Systems, Inc.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Legal Notices
The Multi-Tech products are not designed, manufactured or intended for use, and should not be used, or sold or re-sold for use, in connection with
applications requiring fail-safe performance or in applications where the failure of the products would reasonably be expected to result in personal injury
or death, significant property damage, or serious physical or environmental damage. Examples of such use include life support machines or other life
preserving medical devices or systems, air traffic control or aircraft navigation or communications systems, control equipment for nuclear facilities, or
missile, nuclear, biological or chemical weapons or other military applications (“Restricted Applications”). Use of the products in such Restricted
Applications is at the user’s sole risk and liability.
MULTI-TECH DOES NOT WARRANT THAT THE TRANSMISSION OF DATA BY A PRODUCT OVER A CELLULAR COMMUNICATIONS NETWORK WILL BE
UNINTERRUPTED, TIMELY, SECURE OR ERROR FREE, NOR DOES MULTI-TECH WARRANT ANY CONNECTION OR ACCESSIBILITY TO ANY CELLULAR
COMMUNICATIONS NETWORK. MULTI-TECH WILL HAVE NO LIABILITY FOR ANY LOSSES, DAMAGES, OBLIGATIONS, PENALTIES, DEFICIENCIES, LIABILITIES,
COSTS OR EXPENSES (INCLUDING WITHOUT LIMITATION REASONABLE ATTORNEYS FEES) RELATED TO TEMPORARY INABILITY TO ACCESS A CELLULAR
COMMUNICATIONS NETWORK USING THE PRODUCTS.
The Multi-Tech products and the final application of the Multi-Tech products should be thoroughly tested to ensure the functionality of the Multi-Tech
products as used in the final application. The designer, manufacturer and reseller has the sole responsibility of ensuring that any end user product into
which the Multi-Tech product is integrated operates as intended and meets its requirements or the requirements of its direct or indirect customers. MultiTech has no responsibility whatsoever for the integration, configuration, testing, validation, verification, installation, upgrade, support or maintenance of
such end user product, or for any liabilities, damages, costs or expenses associated therewith, except to the extent agreed upon in a signed written
document. To the extent Multi-Tech provides any comments or suggested changes related to the application of its products, such comments or suggested
changes is performed only as a courtesy and without any representation or warranty whatsoever.
LEGAL NOTICES AND CONTACT INFORMATION
3
Universal Socket Developer Guide
Country
By Email
By Phone
Europe, Middle East, Africa:
support@multitech.co.uk
+(44) 118 959 7774
U.S., Canada, all others:
support@multitech.com
(800) 972-2439 or (763) 717-5863
Contacting Multi-Tech
Knowledge Base
The Knowledge Base provides immediate access to support information and resolutions for all Multi-Tech products. Visit
http://www.multitech.com/kb.go.
Support Portal
To create an account and submit a support case directly to our technical support team, visit: https://support.multitech.com
Support
Business Hours: M-F, 9am to 5pm CT
World Headquarters
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
Phone: 763-785-3500 or 800-328-9717
Fax: 763-785-9874
Warranty
To read the warranty statement for your product, please visit: http://www.multitech.com/warranty.go.
CONTENTS
Universal Socket Developer Guide
4
Contents
Chapter 1 – Embedded Solutions ................................................................................................................................7
Universal Socket Connectivity Features .............................................................................................................................. 7
Universal IP ......................................................................................................................................................................... 7
Developer Documentation .................................................................................................................................................. 7
The Universal Socket Design ............................................................................................................................................... 8
Embedded Modem and Device Servers .............................................................................................................................. 9
Embedded Cellular Modems........................................................................................................................................... 9
Embedded Analog Modems ............................................................................................................................................ 9
Embedded Device Servers .............................................................................................................................................. 9
Universal Developer Kit Contents ..................................................................................................................................... 10
Attaching Power Supply Blades ........................................................................................................................................ 10
Chapter 2 – Universal Socket Pinout ......................................................................................................................... 12
Pinout Diagrams ................................................................................................................................................................ 12
Universal SocketModem Pinout........................................................................................................................................ 12
Chapter 3 – Universal Design Considerations ............................................................................................................ 16
Noise Suppression Design Considerations ........................................................................................................................ 16
PC Board Layout Guidelines .............................................................................................................................................. 16
User accessible areas .................................................................................................................................................... 16
Electromagnetic Interference (EMI) Considerations ........................................................................................................ 17
Electrostatic Discharge Control ......................................................................................................................................... 17
USB Design Considerations ............................................................................................................................................... 18
Phone Line Warning Statement for the Developer Board ................................................................................................ 18
Mounting Hardware and Tooling Holes ............................................................................................................................ 18
Soldering ........................................................................................................................................................................... 18
Chapter 4 – Developer Board and Schematics ........................................................................................................... 19
SocketModem Developer Board ....................................................................................................................................... 19
SocketModem Developer Board Block Diagram ............................................................................................................... 21
Developer Board Schematics ............................................................................................................................................ 22
Board Components ........................................................................................................................................................... 29
Installing a Universal Socket Communications Device onto the Board ............................................................................ 30
Installing a SIM Card in a Device ....................................................................................................................................... 30
Chapter 5 – Safety Notices and Warnings .................................................................................................................. 31
Cellular Safety ................................................................................................................................................................... 31
RF Safety ....................................................................................................................................................................... 31
Interference with Pacemakers and Other Medical Devices ......................................................................................... 32
Vehicle Safety ................................................................................................................................................................ 32
Device Maintenance ..................................................................................................................................................... 33
CONTENTS
5
Universal Socket Developer Guide
User Responsibility ........................................................................................................................................................ 33
Analog Telecom Safety Warnings ..................................................................................................................................... 33
Chapter 6 – Labeling Requirements .......................................................................................................................... 34
Cellular Approvals and Labeling Requirements ................................................................................................................ 34
Approvals and Certification .......................................................................................................................................... 34
Analog Labeling Requirements ......................................................................................................................................... 36
United States Labeling Requirements (for Dial-Up Modems) ...................................................................................... 36
Canadian Labeling Requirements (for Dial-Up Modems) ............................................................................................. 37
Chinese Labeling Requirement ......................................................................................................................................... 40
Chapter 7 – Regulatory Information.......................................................................................................................... 41
Telecom Approvals for Analog Modems ........................................................................................................................... 41
Country/Region-Specific Statements ................................................................................................................................ 41
EMC, Safety, and R&TTE Directive Compliance ............................................................................................................ 41
International Modem Restrictions ................................................................................................................................ 42
47 CFR Part 15 Regulation Class B Devices ................................................................................................................... 42
EMC Requirements for Industry Canada ...................................................................................................................... 42
47 CFR Part 68 Telecom ................................................................................................................................................ 43
South African Statement ............................................................................................................................................... 44
Thailand Approval for MT9234SMI and MT5692SMI ................................................................................................... 44
New Zealand Telecom Warning Notice ........................................................................................................................ 44
Brazil Approval for the MT9234SMI.............................................................................................................................. 45
Russian Statement ........................................................................................................................................................ 45
Korea Class B Statement ............................................................................................................................................... 46
Japan Requirements ..................................................................................................................................................... 46
Other Countries ............................................................................................................................................................ 46
Waste Electrical and Electronic Equipment Statement .................................................................................................... 47
WEEE Directive .............................................................................................................................................................. 47
Instructions for Disposal of WEEE by Users in the European Union ............................................................................. 47
REACH Statement .............................................................................................................................................................. 48
Registration of Substances ............................................................................................................................................ 48
Substances of Very High Concern (SVHC) ..................................................................................................................... 48
Restriction of the Use of Hazardous Substances (RoHS) .................................................................................................. 49
Information on HS/TS Substances According to Chinese Standards ................................................................................ 50
Information on HS/TS Substances According to Chinese Standards (in Chinese) ............................................................ 51
依照中国标准的有毒有害物质信息 ........................................................................................................................... 51
Chapter 8 – Antennas, Cables, and GPS ..................................................................................................................... 52
Antenna System for Cellular Devices ................................................................................................................................ 52
PTCRB Antenna Requirements...................................................................................................................................... 52
Authorized Antennas .................................................................................................................................................... 52
CONTENTS
Universal Socket Developer Guide
6
HSPA / UMTS Antenna Requirements/Specifications .................................................................................................. 52
EV-DO and CDMA Antenna Requirements/Specifications ........................................................................................... 53
GSM Antenna Requirements/Specifications ................................................................................................................ 53
GPS Antenna Requirements/Specifications .................................................................................................................. 53
Bluetooth Antenna Requirements/Specifications ........................................................................................................ 53
Antennas Available from Multi-Tech ............................................................................................................................ 54
Additional Sources of Bluetooth Antennas ................................................................................................................... 55
Coaxial Cable Specifications .............................................................................................................................................. 55
SMA-to-UFL and RSMA-to-UFL Coax Cables ................................................................................................................. 55
SMA-to-MMCX and RSMA-to-MMCX Coax Cable ......................................................................................................... 55
SMA-to-MMCX Connector ............................................................................................................................................ 56
OEM Integration ................................................................................................................................................................ 57
FCC Notes ...................................................................................................................................................................... 57
Host Labeling ................................................................................................................................................................. 58
Antenna Diversity .............................................................................................................................................................. 58
Using Antenna Diversity ................................................................................................................................................ 59
Placing External Antennas ............................................................................................................................................ 59
Placing GPS Antennas ................................................................................................................................................... 59
Selecting Antennas ....................................................................................................................................................... 59
Antenna Approvals and Safety Considerations ............................................................................................................ 59
Diversity and Power Draw ............................................................................................................................................ 59
Global Positioning System (GPS) ....................................................................................................................................... 60
Technical Specifications ................................................................................................................................................ 60
Features ........................................................................................................................................................................ 60
Underwriters Laboratories Required Global Positioning System (GPS) Statement ...................................................... 60
Chapter 9 – Upgrading Modem Firmware ................................................................................................................. 62
Upgrading with the Flash Wizard ...................................................................................................................................... 62
Chapter 10 – Cellular SocketModems ....................................................................................................................... 63
Models and Documentation ............................................................................................................................................. 63
Account Activation for Cellular Devices ............................................................................................................................ 63
Chapter 11 – Analog SocketModems ........................................................................................................................ 64
Models and Documentation ............................................................................................................................................. 64
Recommended Parts for Analog SocketModems ............................................................................................................. 64
Telecom ......................................................................................................................................................................... 65
Chapter 12 – Embedded Device Servers .................................................................................................................... 66
Models and Documentation ............................................................................................................................................. 66
Index ....................................................................................................................................................................... 67
CHAPTER 1 – EMBEDDED SOLUTIONS
7
Universal Socket Developer Guide
Chapter 1 – Embedded Solutions
Universal Socket Connectivity Features
Get to market quickly with Multi-Tech's pre-approved and ready-to-integrate embedded device networking
solutions with Universal Socket connectivity and Universal IP. Once deployed, your initial design and host
application can quickly adjust to new technologies, essentially future-proofing your solution.
Multi-Tech's Universal Socket offers a flexible architecture that allows you to use one system design and populate
it with your connectivity module of choice.
Interchangeable socket device
Provides cellular, Ethernet, PSTN or Bluetooth network access
Global approvals
Quick-to-market
Easy migration to future technologies, simply upgrade your connectivity module and keep your product
current and design intact
Universal IP
Multi-Tech’s Universal IP stack consists of a common set of TCP/IP networking protocols and M2M applications
implemented using a standard AT command interface. Universal IP provides developers a common programming
interface effectively future proofing their application as new cellular technologies are introduced.
Developer Documentation
Download the documentation from www.multitech.com/support.go. Search on your model to access
documentation for that device.
Universal Socket Developer Guide – This document. Provides an overview, safety and regulatory
information, design considerations, schematics, and general device information.
Device Guides – Provides model-specific specifications and developer information.
AT Command Guides – Device specific AT command reference guides.
USB Driver Installation Guide – Provides steps for installing USB drivers.
Fax Commands – Class 1 and Class 2 commands are supported by some analog modems. Consult the Device
Guide to determine which command set is supported by your device.
CHAPTER 1 – EMBEDDED SOLUTIONS
Universal Socket Developer Guide
8
The Universal Socket Design
Each pin on a SocketModem corresponds to a particular function. The universal socket design provides a universal
location for each pin. This allows each SocketModem to be used in a common board. Refer to Universal Socket
Pinout for pinout details.
CHAPTER 1 – EMBEDDED SOLUTIONS
9
Universal Socket Developer Guide
SocketModem iCell
Complete, ready-to-integrate 2G and 3G, GSM and CDMA intelligent cellular modems
using Multi-Tech's Universal Socket design and Universal IP stack for
automatic/persistent connectivity and enhanced M2M (machine-to-machine)
functionality. Models available with GPS tracking capability.
SocketModem Cell
Complete, ready-to-integrate 2G and 3G, GSM, CDMA, and LTE embedded cellular
modem’s using Multi-Tech's Universal Socket design.
SocketModem EDGE
A complete, ready-to-integrate EDGE Class 12 embedded cellular modem using MultiTech's Universal Socket design.
SocketModem
Complete, ready-to-integrate data/fax analog embedded modems using MultiTech's Universal Socket design and telecom approved in more than 50 countries.
SocketModem IP
A complete, V.92 intelligent modem that creates Internet-ready devices by
integrating modem functionality and a complete TCP/IP protocol stack into a single
Universal Socket design.
SocketEthernet IP
Intelligent serial-to-Ethernet device server connects serial devices to an IP network
via a 10/100BaseT Ethernet interface to enable IP networking into virtually any
device allowing remote monitoring, control and configuration. Models available with
medical and high voltage isolation.
SocketWireless
Bluetooth
Complete, ready-to-integrate embedded serial-to-Bluetooth® device server provides
secure wireless connections between a host and peripheral device. Supports pointto-point and multi-point communications allowing wireless data transfers up to 100
meters.
Embedded Modem and Device Servers
Embedded Cellular Modems
Refer to Cellular SocketModems for details about specific models and related documentation.
Embedded Analog Modems
Refer to Analog SocketModems for details about specific models and related documentation.
Embedded Device Servers
Refer to Embedded Device Servers for details about specific models and related documentation.
CHAPTER 1 – EMBEDDED SOLUTIONS
Universal Socket Developer Guide
10
Universal Developer Kit Contents
Developer Board
One MTSMI-UDK Developer Board
Power Supply
One 100-240V 9V-1.7A power supply with removable blades
One US blade/plug
One EURO blade/plug
One UK blade/plug
Cables
One RS-232 DB9F-DB25M serial cable
One RJ-11 phone cable
One RJ-45 Ethernet cable
One USB cable
Antennas
Two hepta band antenna for cellular modems
One 2.4GHz, ½ WAVE antenna with reverse polarity for Bluetooth devices
One GPS antenna
Antenna Cables
One SMA-to-MMCX antenna cable for cellular antennas
Three SMA-to-UFL antenna cables one for select cellular antennas
One for GPS antennas
One RSMA-to-MMCX antenna cable for Bluetooth antennas
Customer Notices
Modem activation notice
Additional
One promotional screwdriver
Power Supply No Blades
Power Supply with EU blade
Power Supply with NAM blade
Power Supply with UK blade
Your Universal Developer Kit (MTSMI-UDK) includes the following:
Attaching Power Supply Blades
Power Supply and Blades
To attach a power supply blade:
1. Remove the power supply cover (not shown). To do this, slide the lock down and hold it while you lift off
the cover.
2. Insert the latch on the blade into the notch on the power supply.
3. Slide the lock down and hold it while you press the blade in place.
CHAPTER 1 – EMBEDDED SOLUTIONS
11
Universal Socket Developer Guide
Latch Notch
Sliding Lock
CHAPTER 2 – UNIVERSAL SOCKET PINOUT
Universal Socket Developer Guide
12
Chapter 2 – Universal Socket Pinout
Pin
Signal Name
In/Out
Description
1
Tip
I/O
Tip Signal from Telco. Tip connection to the phone line (RJ-11 Pin 4). The
SocketModem is Tip/Ring polarity insensitive.
2
Ring
I/O
Ring Signal from Telco. Ring connection to the phone line (RJ-11 Pin 3). The
SocketModem is Tip/Ring polarity insensitive.
3
Safety Void
N/A
Safety Clearance. 2.5 mm is required between TNV circuits and SELV circuits.
4
TX+ O Transmit Outputs (TX+ and TX-). Differential transmit outputs for Ethernet.
5
TX- O Transmit Outputs (TX+ and TX-). Differential transmit outputs for Ethernet.
6
RX- I Receive Inputs. Differential receive input pins for Ethernet. Dummy pin for
MT810SWM-IP.
7
RX+ I Receive Inputs. Differential receive input pins for Ethernet.
8
Safety Void
N/A
Safety Clearance. 2.5 31mm is required between TNV circuits and SELV circuits.
9
Dummy
Dummy pin for EDGE.
Pinout Diagrams
Universal SocketModem Pinout
Note:
Some modems do not include all the pins shown above. Refer to your model’s Device Guide for model
specific pinout information.
CHAPTER 2 – UNIVERSAL SOCKET PINOUT
13
Universal Socket Developer Guide
Pin
Signal Name
In/Out
Description
10
Unused
N/A
Reserved for future use.
11
Unused
N/A
Reserved for future use.
12
Unused
N/A
Reserved for future use.
13
Unused
N/A
Reserved for future use.
14
Unused
N/A
Reserved for future use.
15
GPS-SDI
I
GPS Data In.
16
GPS-SDO
O
GPS Data Out.
17
GPS-PPS
GPS Pulse per Second.
18
SPI_CLK
Serial Peripheral Interface custom factory option.
19
SPI_MISO
O
Serial Peripheral Interface custom factory option.
20
SPI_MOSI
I
Serial Peripheral Interface custom factory option.
21
SPI_CS0
Serial Peripheral Interface custom factory option.
22
MIC+
I
Microphone positive input. See individual Device Guides for microphone details.
23
MIC-
I
Microphone negative input. See individual Device Guides for microphone details.
24
-RESET*
I
Device Reset (with pull-up). The active low –RESET input resets the device logic
and returns the configuration of the device to the original factory default values or
"stored values" in the NVRAM. –RESET is tied to VCC through a time-constant
circuit for “Power-on-Reset” functionality. See individual Device Guides for
timings.
A Design Consideration
Allowing the host processor to control the SocketModem’s RESET line allows the
host to reset the device if it fails to respond normally. Resetting the SocketModem
returns it to a known functional state.
25
USB_VBUS
I
USB Voltage Sense. Senses the voltage level of the USB to determine if the bus is
available.
26
GND
GND
Logic Ground.
27
USB_DP
I/O
USB Data Positive. Positive pin of the USB data pair.
28
USB_DN
I/O
USB Data Negative. Negative pin of the USB data pair.
29
LED DCD
O
DCD (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): When lit, indicates a connection. No
series resistor.
30
LED RX
O
RX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
31
LED DTR
O
DTR (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
32
LED TX
O
TX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
33
–RTS
I
Request to Send (Active Low). –RTS is controlled by the DTE to indicate whether
or not the DTE is ready to receive data. –RTS ON (low) indicates that the DTE is
ready to receive data from the modem on RXD. –RTS OFF indicates to the
SocketModem that it should not transfer data on the RXD.
Note: When the –RTS pin is not in use, it should be tied low.
CHAPTER 2 – UNIVERSAL SOCKET PINOUT
Universal Socket Developer Guide
14
Pin
Signal Name
In/Out
Description
34
–RXD
O
Received Data. The SocketModem uses the RXD line to send data to the DTE and
to send SocketModem responses to the DTE. In command mode, –RXD data
presents the SocketModem responses to the DTE. SocketModem responses take
priority over incoming data when the two signals are in competition for –RXD.
When no data is transmitted, the signal is held in mark condition.
35
–TXD
I
Transmitted Data. The DTE uses the –TXD line to send data to the SocketModem
for transmission or to transmit commands to the SocketModem. The DTE holds
this circuit in mark state when no data is being transmitted or during intervals
between characters.
36
–RI
O
RING (Active Low). Incoming ring signal from phone.
Ring Indicate. –RI output ON (low) indicates the presence of an ON segment of a
ring signal on the telephone line. The modem will not go off-hook when –RI is
active; the modem waits for –RI to go inactive before going off-hook.
SocketWireless Bluetooth (MTS2BTSMI): Strobes 1/sec for slave indication.
37
–DSR
O
Data Set Ready (Active Low). –DSR indicates SocketModem status to the DTE. –
DSR OFF (high) indicates that the DTE is to disregard all signals appearing on the
interchange circuits except Ring Indicator (–RI). It reflects the status of the local
data set and does not indicate an actual link with any remote data equipment.
38
–CTS
O
Clear to Send (Active Low). –CTS is controlled by the SocketModem to indicate
whether or not the SocketModem is ready to transmit data. –CTS ON indicates to
the DTE that signals on TXD will be transmitted. –CTS OFF indicates to the DTE that
it should not transfer data on TXD.
39
–DCD
O
Data Carrier Detect (Active Low). –DCD output is ON (low) when a data
connection is established and the SocketModem is ready to send/receive data.
40
–DTR
I
Data Terminal Ready (Active Low). The –DTR input is turned ON (low) when the
DTE is ready to communicate. –DTR ON prepares the modem to be connected,
and, once connected, maintains the connection. –DTR OFF places the modem in
the disconnect state under control of the &Dn and &Qn commands.
Note: When the –DTR pin is not in use, it should be tied low.
41
GND
GND
Logic Ground.
42
SPK-
O
Cellular GPRS, CDMA, and EDGE. Negative analog speaker output.
43
SPK+
O
Cellular GPRS, CDMA, and EDGE. Positive analog speaker output.
44
PCM_DO
O
Digital voice custom factory option.
45
PCM_DI
I
Digital voice custom factory option.
46
PCM_FS
O
Digital voice custom factory option.
47
PCM_CLK
O
Digital voice custom factory option.
48
GPIO1
I/O
General Purpose Input/Output. User-configurable input or output pin. 2
49
GPIO1
I/O
General Purpose Input/Output. User-configurable input or output pin. 2
50
GPIO1
I/O
General Purpose Input/Output. User-configurable input or output pin. 2
51
GPIO1
I/O
General Purpose Input/Output. User-configurable input or output pin. 2
52
DBTX/GPIO
O
Not currently used.
53
DBRX/GPIO
I
Not currently used.
54
GPIO
N/A
Reserved for future use.
55
Heartbeat
N/A
Reserved for future use.
CHAPTER 2 – UNIVERSAL SOCKET PINOUT
15
Universal Socket Developer Guide
Pin
Signal Name
In/Out
Description
56
–LED FDX
O
LED Full Duplex (Active Low). LED Output. During normal operation, this pin lights
the FDX LED to indicate a full duplex mode.
57
–LED ACT
O
LED Active (Active Low). LED Output. During normal operation, this pin lights the
Activity LED when transmitting or receiving. It flashes at a rate of 50ms high and
50ms low when active.
58
–LEDLINK
O
LED LINK (Active Low). LED Output. During normal operation, this pin lights the
LINK LED to indicate a good link is detected.
Refer the individual Device Guide for PIN 58 LED Mode details.
59
–LEDCOL
O
LED Collision (Active Low). LED Output. During normal operation, this pin lights
the COL LED to indicate a collision. It flashes at 50ms high and 50ms low when
active.
60
–LEDSPD
O
LED Speed (Active Low). LED Output. During normal operation, this pin lights the
SPEED LED to indicate 100Mbps is selected.
61
VCC
PWR
DC Input Power. 3.3V or 5VDC power, depending upon the build.
62
MICV
I
Single-Ended Microphone. Single-ended microphone input for dial-up
SocketModem speakerphone and TAM functions.
63
AGND
GND
Analog Ground. Analog ground is tied common with DGND on the SocketModem.
To minimize potential ground noise issues, connect audio circuit return to AGND.
64
SPKR
O
Speaker. Dual purpose output for call progress signals or speakerphone functions.
Call Progress signaling on MT5692SMI and MT2492SMI is a square wave output
that can be optionally connected to a low-cost single-ended speaker; e.g., a
sounducer or an analog speaker circuit.
Call progress on the MT9234SMI is an analog output.
Speakerphone Output on the MT5692SMI is under the control of +FCLASS. This is
a single-ended analog output. SPKR is tied directly to the CODEC. One side of a
differential AC output coupled through a 6.8K ohm resistor and capacitor.
65
Unused
N/A
Reserved for future use.
66
Unused
N/A
Reserved for future use.
67
Unused
N/A
Reserved for future use.
68
Unused
N/A
Reserved for future use.
69
Unused
N/A
Reserved for future use.
70
Unused
N/A
Reserved for future use.
71
Unused
N/A
Reserved for future use.
72
Unused
N/A
Reserved for future use.
73
Unused
N/A
Reserved for future use.
74
Unused
N/A
Reserved for future use.
1
GPIO pins can be configured using the Universal IP AT Commands. Refer to the Universal IP AT Commands
Reference Guide.
2
For MTSMC-H3-MI-IP, MTSMC-EV2-MI-IP, MTSMC-EV2-MI-GP, MTSMC-H5-MI, MTSMC-H5-MI-GP, MTSMC-EV3-
MI and MTSMC-EV-MI-GP only.
CHAPTER 3 – UNIVERSAL DESIGN CONSIDERATIONS
Universal Socket Developer Guide
16
Chapter 3 – Universal Design Considerations
Noise Suppression Design Considerations
Adhere to engineering noise-suppression practices when designing a printed circuit board (PCB) containing the
SocketModem. Noise suppression is essential to the proper operation and performance of the modem and
surrounding equipment.
Any OEM board design that contains the SocketModem should consider both on-board and off-board generated
noise that can affect digital signal processing. Both on-board and off-board generated noise that is coupled onboard can affect interface signal levels and quality. Noise in frequency ranges that affect modem performance is of
particular concern.
On-board generated electromagnetic interference (EMI) noise that can be radiated or conducted off-board is
equally important. This type of noise can affect the operation of surrounding equipment. Most local government
agencies have stringent certification requirements that must be met for use in specific environments.
Proper PC board layout (component placement, signal routing, trace thickness and geometry, etc.) component
selection (composition, value, and tolerance), interface connections, and shielding are required for the board
design to achieve desired modem performance and to attain EMI certification.
Other aspects of proper noise-suppression engineering practices are beyond the scope of this guide. Consult noise
suppression techniques described in technical publications and journals, electronics and electrical engineering text
books, and component supplier application notes.
PC Board Layout Guidelines
In a 4-layer design, provide adequate ground plane covering the entire board. In 4-layer designs, power and
ground are typically on the inner layers. All power and ground traces should be 0.05 inches wide.
The recommended hole size for the SocketModem pins is 0.036 in. +/-0.003 in. in diameter. Use spacers to hold
the SocketModem vertically in place during the wave solder process.
All creepages and clearances for the SocketModem have been designed to meet requirements of safety standards
EN60950 or EN60601. The requirements are based on a working voltage of 125V or 250V. When implementing the
recommended DAA* circuit interface in a third party design, strictly follow all creepage and clearance
requirements in order to meet safety standards. The third party safety design must be evaluated by the
appropriate national agency per the required specification.
User accessible areas
Based on where the third party design is to be marketed, sold, or used, it may be necessary to provide an
insulating cover over all TNV exposed areas. Consult with the recognized safety agency to determine the
requirements.
Note:
Even if the recommended design considerations are followed, there are no guarantees that a particular
system will comply with all the necessary regulatory requirements. It is imperative that specific designs be
completely evaluated by a qualified/recognized agency.
*DAA stands for Data Access Arrangement. DAA is the telephone line interface of the SocketModem.
CHAPTER 3 – UNIVERSAL DESIGN CONSIDERATIONS
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Universal Socket Developer Guide
Electromagnetic Interference (EMI) Considerations
The following guidelines are offered specifically to help minimize EMI generation. Some of these guidelines are the
same as, or similar to, the general guidelines. To minimize the contribution of the SocketModem-based design to
EMI, you must understand the major sources of EMI and how to reduce them to acceptable levels.
Keep traces carrying high frequency signals as short as possible.
Provide a good ground plane or grid. In some cases, a multilayer board may be required with full layers for
ground and power distribution.
Decouple power from ground with decoupling capacitors as close to the SocketModem power pins as
possible.
Eliminate ground loops, which are unexpected current return paths to the power source and ground.
Decouple the telephone line cables at the telephone line jacks. Typically, use a combination of series
inductors, common mode chokes, and shunt capacitors. Methods to decouple telephone lines are similar to
decoupling power lines; however, telephone line decoupling may be more difficult and deserves additional
attention. A commonly used design aid is to place footprints for these components and populate as
necessary during performance/EMI testing and certification.
Decouple the power cord at the power cord interface with decoupling capacitors. Methods to decouple
power lines are similar to decoupling telephone lines.
Locate high frequency circuits in a separate area to minimize capacitive coupling to other circuits.
Locate cables and connectors to avoid coupling from high frequency circuits.
Lay out the highest frequency signal traces next to the ground grid.
If using a multilayer board design, make no cuts in the ground or power planes and be sure the ground plane
covers all traces.
Minimize the number of through-hole connections on traces carrying high frequency signals.
Avoid right angle turns on high frequency traces. Forty-five degree corners are good; however, radius turns
are better.
On 2-layer boards with no ground grid, provide a shadow ground trace on the opposite side of the board to
traces carrying high frequency signals. This will be effective as a high frequency ground return if it is three
times the width of the signal traces.
Distribute high frequency signals continuously on a single trace rather than several traces radiating from one
point.
Electrostatic Discharge Control
Handle all electronic devices with certain precautions to avoid damage due to the static charge accumulation.
See the ANSI/ESD Association Standard (ANSI/ESD S20.20-1999) – a document “for the Development of an
Electrostatic Discharge Control for Protection of Electrical and Electronic Parts, Assemblies and Equipment.” This
document covers ESD Control Program Administrative Requirements, ESD Training, ESD Control Program Plan
Technical Requirements (grounding/bonding systems, personnel grooming, protected areas, packaging, marking,
equipment, and handling), and Sensitivity Testing.
Multi-Tech Systems, Inc. strives to follow all of these recommendations. Input protection circuitry has been
incorporated into the Multi-Tech devices to minimize the effect of static buildup, take proper precautions to avoid
exposure to electrostatic discharge during handling.
CHAPTER 3 – UNIVERSAL DESIGN CONSIDERATIONS
Universal Socket Developer Guide
18
Multi-Tech uses and recommends that others use anti-static boxes that create a faraday cage (packaging designed
Solder pot temperature:
275C
Preheat zone 1:
135C
Preheat zone 2:
160C
Preheat zone 3:
175C
Belt speed:
35.4 inches per minute
to exclude electromagnetic fields). Multi-Tech recommends that you use our packaging when returning a product
and when you ship your products to your customers.
USB Design Considerations
Multi-Tech recommends consulting Intel's High Speed USB Platform Design Guidelines, Rev. 1.0 for information
about USB signal routing, impedance, and layer stacking. Also:
Shield USB cables with twisted pairs (especially those containing D+/D-).
Use a single 5V power supply for USB devices. Consult your model’s Device Guide for Power Draw section for
current (ampere) requirements.
Route D+/D- together in parallel with the trace spacing needed to achieve 90 ohms differential impedance
for the USB pair and to maintain a 20 mil space from the USB pair and all other signals.
If power is provided externally, use a common ground between the carrier board and SocketModem.
Phone Line Warning Statement for the Developer Board
(Analog only) Use extreme caution when the phone line is installed due to live energized components. Do not
touch any components on the board while the phone line is installed.
Detach the phone line when making modifications to or servicing the developer board.
For other telephone warnings, refer to the Telecom Warnings
Mounting Hardware and Tooling Holes
Refer to individual Device Guide for specific hardware requirements.
Soldering
Multi-Tech uses a wave soldering process:
Preheat zones have top and bottom heaters.
WARNING: Do not wash. Washing may damage the device.
NOTE: Conditions of Acceptability for UL are available upon request at https://support.multitech.com.
CHAPTER 4 – DEVELOPER BOARD AND SCHEMATICS
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Universal Socket Developer Guide
Chapter 4 – Developer Board and Schematics
Note: Third-party components shown in the following drawings are included as examples only.
SocketModem Developer Board
This developer board drawing shows the major board components for all SocketModems.
CHAPTER 4 – DEVELOPER BOARD AND SCHEMATICS
Universal Socket Developer Guide
20
CHAPTER 4 – DEVELOPER BOARD AND SCHEMATICS
21
Universal Socket Developer Guide
SocketModem Developer Board Block Diagram
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