Sierra Wireless MP 875 User Manual 2

MP 875 Modem

User Guide

2130808

Rev 1.1

Preface

Important Notice

Safety and Hazards

Due to the nature of wireless communications, transmission
and reception of data can never be guaranteed. Data may be
delayed, corrupted (i.e., have errors) or be totally lost.
Although significant delays or losses of data are rare when
wireless devices such as the Sierra Wireless modem are used in
a normal manner with a well-constructed network, the Sierra
Wireless modem should not be used in situations where
failure to transmit or receive data could result in damage of
any kind to the user or any other party, including but not
limited to personal injury, death, or loss of property. Sierra
Wireless accepts no responsibility for damages of any kind
resulting from delays or errors in data transmitted or received
using the Sierra Wireless modem, or for failure of the Sierra
Wireless modem to transmit or receive such data.

Do not operate the Sierra Wireless modem in areas where
blasting is in progress, where explosive atmospheres may be
present, near medical equipment, near life support equipment,
or any equipment which may be susceptible to any form of
radio interference. In such areas, the Sierra Wireless modem
MUST BE POWERED OFF. The Sierra Wireless modem can
transmit signals that could interfere with this equipment.

Do not operate the Sierra Wireless modem in any aircraft,
whether the aircraft is on the ground or in flight. In aircraft, the
Sierra Wireless modem MUST BE POWERED OFF. When
operating, the Sierra Wireless modem can transmit signals that
could interfere with various onboard systems.

Note: Some airlines may permit the use of cellular phones while the
aircraft is on the ground and the door is open. Sierra Wireless
modems may be used at this time.

The driver or operator of any vehicle should not operate the
Sierra Wireless modem while in control of a vehicle. Doing so
will detract from the driver or operator's control and operation
of that vehicle. In some states and provinces, operating such
communications devices while in control of a vehicle is an
offence.

Limitation of
Liability

Rev 1.1 Aug.07 3

The information in this manual is subject to change without
notice and does not represent a commitment on the part of
Sierra Wireless. SIERRA WIRELESS AND ITS AFFILIATES
SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL
DIRECT, INDIRECT, SPECIAL, GENERAL, INCIDENTAL,
CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES
INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS OR

MP 875 Modem User Guide

QUALCOMM

®

3G

REVENUE OR ANTICIPATED PROFITS OR REVENUE
ARISING OUT OF THE USE OR INABILITY TO USE ANY
SIERRA WIRELESS PRODUCT, EVEN IF SIERRA WIRELESS
AND/OR ITS AFFILIATES HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES OR THEY ARE
FORESEEABLE OR FOR CLAIMS BY ANY THIRD PARTY.

Notwithstanding the foregoing, in no event shall Sierra
Wireless and/or its affiliates aggregate liability arising under
or in connection with the Sierra Wireless product, regardless of
the number of events, occurrences, or claims giving rise to
liability, be in excess of the price paid by the purchaser for the
Sierra Wireless product.

Patents

Portions of this product may be covered by some or all of the
following US patents:

5,515,013 5,629,960 5,845,216 5,847,553 5,878,234
5,890,057 5,929,815 6,169,884 6,191,741 6,199,168
6,339,405 6,359,591 6,400,336 6,516,204 6,561,851
6,643,501 6,653,979 6,697,030 6,785,830 6,845,249
6,847,830 6,876,697 6,879,585 6,886,049 6,968,171
6,985,757 7,023,878 7,053,843 7,106,569 7,145,267
7,200,512 D442,170 D459,303

and other patents pending.

This product includes
technology licensed from:

Licensed by QUALCOMM Incorporated under one or more of
the following United States patents and/or their counterparts
in other nations:

4,901,307 5,056,109 5,101,501 5,109,390 5,228,054
5,267,261 5,267,262 5,337,338 5,414,796 5,416,797
5,490,165 5,504,773 5,506,865 5,511,073 5,535,239
5,544,196 5,568,483 5,600,754 5,657,420 5,659,569
5,710,784 5,778,338

Manufactured or sold by Sierra Wireless or its licensees under
one or more patents licensed from InterDigital Group.

Licensed under the following Nortel Networks Limited
patents:

4 2130808

Copyright

United States patent numbers: 5128925, 5398247

France patent numbers: 2665993, 2653959, 2659812, 2745091

© 2007 Sierra Wireless. All rights reserved.

Preface

Trademarks AirCard

trademarks of Sierra Wireless. Watcher
Sierra Wireless, registered in the European Community.
Sierra Wireless, the Sierra Wireless logo, the red wave design,
and the red-tipped antenna are trademarks of Sierra Wireless.

Windows

QUALCOMM
Incorporated. Used under license.

Other trademarks are the property of the respective owners.

Contact
Information

®

and “Heart of the Wireless Machine®” are registered

®

is a registered trademark of Microsoft Corporation.

®

is a registered trademark of QUALCOMM

Sales Desk: Phone: [phone]

Hours: 8:00

E-mail: [e-mail]

Post: Sierra Wireless

13811 Wireless Way
Richmond, BC
Canada V6V 3A4

Fax: [phone]

Web: www.sierrawireless.com

®

is a trademark of

AM to 5:00 PM Pacific Time

Revision History

Revision

number

1.1 August 2007

Release

date

Consult our website for up-to-date product descriptions,
documentation, application notes, firmware upgrades, trouble­shooting tips, and press releases:

www.sierrawireless.com

Changes

• Removed detail about AT command parameters, instead

directing users to the MP 3G Modems AT Command Reference.
(Document #2130810.)

• Updated regulatory information for Canada and the USA. (See

“Regulatory Information” on page 63.).

Rev 1.1 Aug.07 5

MP 875 Modem User Guide

6 2130808

Contents

Introducing the MP 875 Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Network connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Accounts and coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Supported GSM radio frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

USB, Ethernet, or serial computer connection . . . . . . . . . . . . . . . . . . . . . . . . . 14

Virtual serial port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

VPN support for RNAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Hardware and Software

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Required equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

MP Modem accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Installation overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Install the MP modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Step 1—Mount the MP modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Step 2—Mount the antennas and install the cables . . . . . . . . . . . . . . . . 24

Step 3—Install the Power Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Step 4—Connect MP modem to computer cable to the MP modem . . 29

Step 5—Install the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Step 6—Configure your account . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Step 7—Test the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Operating the MP Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Turning the MP modem on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

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MP 875 Modem User Guide

Reading the status indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Resetting the MP modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3G Watcher software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3G Watcher Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Launching 3G Watcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3G Watcher window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Establishing connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Configuring the MP Modem to Report GPS and I/O Data . . . . . . . . . . . . . . .41

GPS configuration and reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

GPS protocols and commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

GPS display in 3G Watcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

GPS TAIP quick reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

I/O device installation and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Connector pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Digital input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Digital output devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Analog input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

I/O configuration using AT or 3G Watcher commands . . . . . . . . . . . . . . 47

Sending Data to Your Network Application . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Configuring the MP modem to route data to a server. . . . . . . . . . . . . . . . . . . 51

Report frequency timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Monitoring and Tracking configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

IP Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

The problem created by Network Address Translation . . . . . . . . . . . . . . 55

Retrieving the Unique Mobile Device ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Support and Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8 2130808

Contents

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Regulatory, radio frequency and electrical specifications . . . . . . . . . . . . . . . 59

Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Weight and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Host interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Other interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

GPS specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

I/O port characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3G Watcher software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

U.S.A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Rev 1.1 Aug.07 9

MP 875 Modem User Guide

10 2130808

1: Introducing the MP 875 Modem

• Network connections

• Accounts and
coverage

• USB, Ethernet, or
serial computer
connection

• USB, Ethernet, or
serial computer
connection

• Virtual serial port

• VPN support for RNAP

• Software

• Documentation

1

Note: Do not connect the MP
modem to a USB port on a
computer before installing the
software. (See “Step 5—Install

the software” on page 31.)

The Sierra Wireless MP modem provides a wireless network
connection for portable computers installed in vehicles.

The MP modem is usually installed in the vehicle’s trunk and
connected to a notebook computer in the passenger
compartment. A radio frequency (RF) antenna mounted on the
roof of the vehicle enables the MP modem to communicate
through a wireless network to a host computer.

A built-in Global Positioning System (GPS) module provides
location and heading data that can also be remotely monitored.

Rev 1.1 Aug.07 11

MP 875 Modem User Guide

The following diagram illustrates how the system works:

GPS satellite

Antenna

MP Modem

MP modem installed in vehicle with a notebook computer

Base station

Firewall

Network

Network operations center

Figure 1-1: The MP modem and the network.

and
Router

VPN over
Internet

Private /

dedicated link

Computer/Host

Host

Customer fixed end system

The MP modem has a rugged design that allows it to
withstand the vibration, shock, humidity, and extremes of
temperature experienced in the normal operation of police,
emergency, utility, and field service vehicles.

You can use the network connection provided by the MP
modem to access shared data, browse the Internet, and send
and receive e-mail and text messages. The MP modem also
allows for sensors, gauges, and alarms (such as panic buttons)
to be installed in vehicles and remotely monitored from a
central location.

Network connections

The MP 875 modem operates over the following networks,
with connectivity and speed dependent on your service
provider and account:

• High Speed Downlink Packet Access (HSDPA) — up to

3.6 megabits per second (Mbps).

12 2130808

Introducing the MP 875 Modem

• Universal Mobile Telecommunications System (UMTS) —

up to 384 kilobits per second (kbps).

• Enhanced Data GSM Environment (EDGE)—up to

236 kbps.

• General Packet Radio Service (GPRS)—up to 56 kbps.

• Circuit switched (dial-up) data connections.

Once a connection is established, you can open your browser
and connect to web sites and access other Internet services
such as e-mail.

Accounts and coverage

You must set up an account with a service provider for each
MP 875 modem you install. After installing the MP 875 modem
software, you must configure it to use an account.

The service provider supplies a Subscriber Identity Module
(SIM) card—sometimes called a smart card or smart chip—for
each account. The SIM card provides the MP 875 modem’s
identity on the network. It contains account information and
must be inserted in the MP modem for the MP modem to
operate. (See “Inserting the SIM Card” on page 32.)

The ability of the MP 875 modem to obtain service and the
type of service obtained in any area is determined by several
factors:

Network proximity and HSDPA availability To obtain
service, you must be within the coverage area of a network
operating in one of the radio frequency bands supported by
the MP 875 modem. The type of connection depends on the
service available in that area. For example, there are areas with
UMTS service in which HSDPA has not yet been implemented.

Roaming If you are within the coverage of a network
operated by a different service provider, your ability to obtain
service depends on whether a roaming agreement exists
between your service provider and the one operating your
current local network. There may be additional fees for
roaming service. Contact your reseller or service provider for
information.

Account provisions Your account may restrict usage of
certain networks or may limit your connection time or data
transmission.

Rev 1.1 Aug.07 13

MP 875 Modem User Guide

Supported GSM radio frequencies

The MP 875 modem has tri-band capability on HSDPA and
UMTS networks, operating on:

• 850 MHz

• 1900 MHz

• 2100 MHz

and quad-band capability on EDGE and GPRS, operating on:

• 850 MHz

• 900 MHz

• 1800 MHz

• 1900 MHz

USB, Ethernet, or serial computer connection

You can connect the MP modem to a USB, Ethernet (RJ45), or
serial (DB9) port on a computer. When connected to a USB or
Ethernet port, the MP modem behaves like a network card.
When connected to a serial port, the MP modem behaves like a
dial-up modem.

Virtual serial port

The MP modem supports four virtual serial ports (VSPs).
Three are reserved for internal use by the MP modem. The
remaining VSP, which is called Sierra Wireless Application
Interface 2, is assigned to a specific COM port that varies
between users. This VSP can be used, for example, to send AT
commands, or to run applications such as HyperTerminal

Special MP modem modes such as GPS that are supported on
a serial port are also available on the virtual port. For example,
with the virtual port enabled, a mapping application on your
computer that normally listens for GPS messages on a serial
port listens for those same messages on the virtual port.

The MP modem virtual serial port is available on both USB
and Ethernet interfaces. For information on enabling a virtual
serial port, see the MP 3G Modems AT Command Reference
(document #2130810).

®

.

14 2130808

Introducing the MP 875 Modem

VPN support for RNAP

This feature allows for the exchange of Remote Network
Access Protocol (RNAP
remote server accessible only through a Virtual Private
Network (VPN) connection. When using this feature, you must
have 3G Watcher running on the computer.

The MP modem sends RNAP data over Ethernet or USB to 3G
Watcher on the computer. 3G Watcher places the RNAP data in
a User Datagram Protocol/Internet Protocol (UDP/IP) packet
and sends it over the VPN connection to the server. When 3G
Watcher receives a UDP/IP packet containing RNAP data over
the VPN connection, it disassembles the packet and sends the
RNAP data to the MP modem.

You can enable this option using 3G Watcher software or AT
commands. See the 3G Watcher online help and the MP 3G
Modems AT Command Reference (document #2130810) for
details.

1

) data between the MP modem and a

Software

The MP modem comes with the following software:

• 3G Watcher, the software for the MP modem which allows

you to manage and monitor your connections.

• The driver that forms the interface between the MP

modem and your Windows operating system.

• The firmware that is stored in non-volatile memory.

The MP 875 modem has an embedded radio module (a
Mini Card 8775), also made by Sierra Wireless, Inc. There
are two firmware programs on the MP 875 modem—one
stored on the controller board of the MP modem and one
on the radio module.

The firmware was loaded into the radio module and con­troller board when the MP modem was assembled. As new
versions of the software and firmware are released, they
are posted at www.sierrawireless.com.

1. RNAP is a Sierra Wireless proprietary protocol that encapsulates the
MTP data that is sent to and from the MP modem. It ensures that the
MP modem and remote host alike recognize the data packets. See The
Monitoring and Tracking Protocol Guide on page 17.

Rev 1.1 Aug.07 15

MP 875 Modem User Guide

MP Modem Manager

MP Modem Manager is a web-based diagnostic and
management tool that allows you to remotely monitor and
configure a fleet of MP modems. With MP Modem Manager
you can:

• Diagnose and troubleshoot field issues.

• Identify MP modem firmware versions and remotely

upgrade firmware.

• Organize MP modems into groups for table viewing of

modem and network status.

• Configure GPS settings.

MP Modem Manager software is available free of charge. To
request this software, complete and submit the form at:

https://www.sierrawireless.com/product/
mp_modem_mgr_request.aspx.

Documentation

This MP 875 Modem User Guide describes how to:

• Install the MP modem hardware.

• Connect the radio and GPS antennas.

• Connect a notebook computer and other input/output

(I/O) devices.

• Install the software.

• Configure the software to use an account and SIM card.

• Interpret the LEDs on the MP modem and the indicators in

the 3G Watcher software.

• Configure the MP modem to report GPS and/or I/O data

(from sensors, gauges, or panic buttons).

• Use the MP modem to connect to a network.

• Collect and use GPS and I/O data from a fleet of vehicles in

which MP modems are installed.

This User Guide is provided as a PDF (Portable Document
Format) file on the installation CD.

Online help is provided with 3G Watcher. It describes all the
icons and indicators in 3G Watcher and provides detailed
instructions on using 3G Watcher to make data connections.
When using 3G Watcher, you can access help through the
menu system or by pressing the

<F1> key.

The MP 3G Modems AT Command Reference (document
#2130810) describes the available AT command set.

16 2130808

Introducing the MP 875 Modem

The MP Modem Manager User Guide (document #2130554)
provides information on how to install, configure, and use the
MP Modem Manager software to manage a fleet of modems.

The Monitoring and Tracking Protocol Guide describes the
protocols used in data transmissions between the MP modem
and the network server. It provides the information necessary
to develop host applications that process GPS and digital input
from a fleet of MP modems. For more information contact

[e-mail].

Rev 1.1 Aug.07 17

MP 875 Modem User Guide

18 2130808

2: Hardware and Software

Installation

• Installation overview

• Install the MP modem This chapter shows you how to install the MP modem in a

vehicle, how to install the 3G Watcher software, and how to
activate your account. Before you begin the installation, ensure
that you have all the necessary components and equipment
listed in the following sections, and have read the “Installation

overview” on page 21.

Package contents

Each MP modem box contains:

• The MP modem

• A mounting template

• Mounting screws and washers

• An installation and documentation CD

• A power harness

If any of these are missing, please contact your account
manager.

2

Required equipment

To install the MP 875 modem, you need the power harness (or
existing MP 750 or MP 775 power harness), mounting
template, and the screws and washers that come with the
device.

You al so re quir e:

• A USB, Ethernet, or 9-pin serial cable. This must be long

enough to run from the mounting location of the MP
modem to the computer.

· The maximum length for the serial or USB cable is 5.5-m

(18 feet). The USB cable must have a Type A male
connector at the computer end and a Type B male
connector at the MP modem end.

· The Ethernet cable should have RJ-45 connectors. The

MP modem’s performance is affected by the type of
Ethernet card in the computer and the type of cable
used. The minimum requirement for the Ethernet cable
is an unshielded twisted pair (UTP) cable, category 3 or

4. For better performance, use a shielded, category 5
cable. The maximum length is 100-m (328 feet).

Rev 1.1 Aug.07 19

MP 875 Modem User Guide

Note: If GPS is being imple­mented, you require either two
antennas or a combination RF
and GPS antenna.

Note: Do not connect the MP
modem to a USB port on a
computer before installing the
software.

• Radio frequency (RF) antenna and cable. The antenna

must have the appropriate regulatory approval, 50 ohm
impedance, and a male TNC connector. It may be a hard or
magnetic-mounted antenna.

• GPS antenna and cable (optional). This is necessary if you

use the built-in GPS module.

• Power supply. This is usually the vehicle’s battery.

• Appropriate electrical grounding. If a ground wire is

necessary, use a 16-gauge wire and connect it to a ground
screw.

• I/O cable (optional). This is required if a panic button,

sensor, gauge, or other I/O device is installed.

System requirements

Before you begin the installation, ensure your computer has
the following system requirements necessary for the instal­lation and running of 3G Watcher software:

• Operating systems:

· Windows

· Windows 2000 Professional (with Service Pack 4 or later)

· Windows XP (Home or Professional)

• Available USB, Ethernet, or DB9 serial port

• CD-ROM drive (installation only)

• 32 MB RAM memory

®

Vista

™

MP Modem accessories

For information about accessories for your MP modem—
including cables and antennas—contact your account manager
or visit www.sierrawireless.com.

20 2130808

Hardware and Software Installation

Installation overview

The following diagram illustrates the overall installation.

RF/GPS
antenna

MP modem

Note: The MP modem is
designed for negative-ground
vehicles only. It will not function
in a positive-ground vehicle.

RS-232 serial (female DB9)

Serial Host

Figure 2-1: Installation of the MP modem in a vehicle equipped with a
notebook computer and a combination antenna, using the car battery for
power and ignition-sense wiring for power on/off.

MP Modem housing

The MP modem has a rectangular metal housing. There is a
connector panel on the rear of the housing, an indicator panel
on the front of the housing, a reset button on top, and
mounting holes along the bottom edges on either side.

Connector panel

The MP 875 modem has the following connectors at the rear of
the MP modem:

USB (Type B)

USB Host

RF

GPS antenna (female SMA)

Ethernet

GPS

Ethernet Host

I/O connector (DB15HD)

I/O

Power

Rev 1.1 Aug.07

RF antenna (female TNC)

Power harness (Molex connector)

Figure 2-2: MP 875 modem rear connectors

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