MultiModem MTCBA-C User manual

MultiModemTM CDMA
ExternalWirelessModem
(Data/Fax/Voice)
MTCBA-C
User Guide

2
User Guide for MultiModem CDMA
External Data/Fax/Voice Wireless Modem
MTCBA-C
P/N 82001130, Revision A
Copyright © 2003 by Multi-Tech Systems, Inc.
All rights reserved. This publication may not be reproduced, in whole or in part,
without prior expressed written permission from Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representation or warranties with respect to
the contents hereof and specifically disclaims any implied warranties of
merchantability or fitness for any particular purpose. Furthermore, 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.
Revision Date Description
A 7/15/03 Initial Release, Rev A.

3
Contents
PRODUCT DESCRIPTION 5
Package Contents 6
Interfaces 6
Parts to be Supplied by End User 7
Antennas 8
Accessory Kit 9
AT Command Info 10
Phone Number for the Wireless Modem 10
Network Access 11
Features 12
APPLICATION OVERVIEW 13
Application Types 13
Benefits/Features in Applications 15
Functions – CDMA Modes 17
SPECIFICATIONS 18
General Specifications 18
Electrical Characteristics 19
Input/output electrical characteristics for external
connections 20
LED Indicators 21
RS232 15-Pin Connector Pinout 22
GETTING STARTED WITH YOUR WIRELESS MULTIMODEM 23
Mechanical Mounting 23
Electrical Installation & Configuration 26
Mobile PhoneTools 29

4
Verifying signal strength 30
Verifying network registration 31
Testing the Configuration 32
Testing the Configuration (continued) 33
Testing the Configuration (continued) 34
TROUBLESHOOTING 35
Situation A: The modem does not answer through the
serial link 35
Situation B: The modem always returns «Error» when
trying to issue a communication 37
Situation C: The modem always returns «No carrier»
when trying to issue a communication 42
SAFETY 44
General Safety 44
Vehicle Safety 46
Maintenance of Your Modem 46
Your Responsibility 47
WARRANTY & REPAIRS POLICIES 48
Warranty 48
Repairs 49
Repair Procedures for U.S. and Canadian Customers 49
Repair Procedures for International Customers
(Outside U.S.A. and Canada) 51
Repair Procedures for International Distributors 52
WIRELESS MODEM REFERENCE INFO 53

Product Description
5
Product Description
The Multi-Tech MultiModem CDMA is an
external data/fax/voice wireless modem. It also
supports mobile originated short message service
(SMS) and mobile-terminated SMS. Designed for
global use, it offers standards-based multi-band
CDMA2000 1x performance. This ready-to-deploy,
standalone modem allows developers to add
wireless communication to products with a
minimum of development time and expense. The
MultiModem CDMA is based on industry-
standard open interfaces, is fully type approved,
and can be desktop or panel mounted.

Product Description
6
Package Contents
•one modem
•two holding bridles (mounting brackets)
•one RS-232 15-to-9-pin cable
•one power supply cable with fuse
•one User Manual (this document)
Interfaces
The Wireless MultiModem has several interfaces:
•LED function indicating operating status
•External antenna (via SMA connector)
•Serial and control link (via 15 pins SUB D)
•Power supply (via 2.5mm miniature power
jack)

Product Description
7
Parts to be Supplied by End User
•mounting screws
(screw shaft diameter = .17” max.)
•antenna
The antenna used must be both of the
correct frequency and of the style
appropriate to the application.

Product Description
8
Antennas
GSM 850 EGSM 900
Frequency RX 869 to 894 MHz 925 to 960 MHz
Frequency TX 824 to 849 MHz 880 to 915 MHz
RF Power
Stand 2W at 12.5% duty cycle 2W at 12.5% duty cycle
Impedance 50 ohms
VSWR <2
Typical
Radiated Gain 0 dBi on azimuth plane
GSM 1800 GSM 1900
Frequency RX 1805 to 1880 MHz 1930 to 1990
MHz
Frequency TX 1710 to 1875 MHz 1850 to 910 MHz
RF Power
Stand 1W at 12.5% duty cycle 1W at 12.5% duty cycle
Impedance 50 ohms
VSWR <2
Typical
Radiated Gain 0 dBi on azimuth plane

Product Description
9
Accessory Kit
A Wireless MultiModem Accessory Kit is
available. Generally speaking, it is useful to
have one or two kits to configure a group or
fleet of Wireless MultiModem units
(generally, you will not need one kit for every
modem). The kit includes an antenna, a
power supply and a product CD. The product
CD contains an AT Command manuals, other
documentation, and modem software.

Product Description
10
AT Command Info
This manual describes a minimal set of AT
commands that are adequate for configuring
many common application situations. A
complete set of AT command definitions can
be found in the CDMA AT Commands
Reference Guide. This manual is available on
the MultiTech web site or on the Accessory
Kit CD.
Phone Number for the Wireless Modem
Every wireless modem will have its own
unique phone number.

Product Description
11
Network Access
The network access arrangements to be
specified in Windows Dial-Up Networking (of
the computer that the wireless modem is
serving) will vary according to the type of
wireless service used.
•For point to point data, a circuit-switched
data connection is used. The user can set
up DUN to make a conventional V.32
modem connection to any terminating
modem at the other end. The phone
number specified in DUN can be one
supplied by the wireless service provider
or another phone number related to a
different dialup modem service (e.g., a
dialup modem service phone number
from any commercial or private dialup
network).
•For CDMA 1x data, a single DUN number
is generally used by all of a wireless
provider’s subscribers throughout its area
of coverage (regional, nationwide,
continental, etc.). Rather than being a
literal phone directory number, as in
conventional DUN, this is a code that
gives the modem Internet access.

Product Description
12
Features
•CDMA2000 1xRTT
operation •CDMA IS-95-A, IS-95B
•Dual-band 800/1900
CDMA •AT command compatible
•Class 2.0 Group 3 FAX •Phone book management
and Personal Information
Management (PIM)
•Desktop or panel
mounting •Fixed dialing number
•Short Message Service
features including SMS
mobile originated, SMS
mobile terminated, cell
broadcast, Over the Air
Activation (OTA),
OTASP, OTAPA
•Supplementary services
including call forwarding,
call barring, multiparty,
call waiting and call hold,
calling line identification,
closed user group, call
transfer
•Voice features include
DTMF, telephony,
OCELP 13K, echo
cancellation
•Numerous LEDs provide
operational status
•SMA antenna connector •Real time clock
•Serial interface supports
DTE speeds to 230K •Alarm management

Application Overview
13
Application Overview
Application Types
With packet data speeds up to 153K bps, the
MultiModem CDMA is targeted at applications
that periodically need to send or receive data over
a wireless network. It is an ideal solution for:
Appliances Remote Diagnostics
ATM Terminals Remote Metering
Automotive Security Systems
Data Collection Vending/Gaming
Machines
Gas Pumps Other devices
requiring wireless
connectivity.
Industrial and
Medical Remote
Monitoring Systems
Note: The Wireless
MultiModem must be
mounted with at least 8
inches (20 cm) of clearance
from the human body.

Application Overview
14
RS232
Wireless MultiModem used in
remote ATM application.

Application Overview
15
Benefits/Features in Applications
Short Development Time. The MultiModem
CDMA can make your existing and next
generation device, machine, or system,
communication-ready without requiring any
hardware changes to its design. It actually
provides faster time-to-market because it relieves
the burden and expense of obtaining network and
RF approvals. This complete, ready-to-deploy
wireless modem allows you to enhance your
product while you focus on developing its core
features.
Voice Features. The MultiModem CDMA
provides telephony and Dual Tone Multi
Frequency (DTMF) functionality as well as
QCELP (13K) and echo cancellation.
Short Message Services. The MultiModem
CDMA offers SMS features such cell broadcast,
Over the Air Activation (OTA), OTASP, and
OTAPA. The MultiModem CDMA is SMS Mobile
Originated and SMS Mobile Terminated.
Compatible Supplementary Services. The
MultiModem CDMA is compatible with
supplementary services such as call forwarding,
call barring, multiparty, call waiting and call hold,

Application Overview
16
calling line identification, closed user group and
call transfer.
Management Features. The MultiModem
CDMA provides advanced management features
including phone book management, fixed dialing
number, real time clock and alarm management.
Industry-standard Modem Commands. The
MultiModem CDMA provides industry-standard
AT-style commands for ease of integration into
your existing software application.
Industrial Chassis. The MultiModem CDMA is
packaged in a rugged, water resistant, industrial
chassis. The chassis has an RS-232 DE-15
Voice/Data interface connector and a permanent
screw-type power connector. It also has an SMA
antenna connector. The chassis can be side-
mounted on a panel or top-mounted on a desktop
or other surface. A set of LEDs indicate the
modem’s operational status.
Network and RF Approved. The MultiModem
CDMA has been tested and certified with wireless
telecom network providers worldwide. In
addition, it has successfully completed worldwide
compliance testing for global RF approval.

Application Overview
17
Functions – CDMA Modes
MODE DESCRIPTION
Standard Dual Band 800/1900 CDMA
Interface Serial interface RS232. V.24/V.28
Autobauding function. AT command set based
on TIA/EIA/IS707.3, V.25ter and GSM 07.05
& 07.07
SMS Mobile Originated (MO) and Mobile
Terminated (MT), Over the Air Activation
(OTA), OTASP, and OTAPA.
Data Asynchronous 2400, 4800, 9600 and 14400 bps.
Data Transparent and Non Transparent
modes.
In Non Transparent Mode only: 300, 1200,
1200/75 baud rates are available.
Mode 3.1 KHz (PSTN) and V110 (ISDN).
Fax [phone]/9600 bps
Class 2. Group 3 compatible.

Specifications
18
Specifications
General Specifications
Power Requirements 5 V to 32VDC; 400mA Average
@5V, 700mA Maximum @ 5V
Mechanical
Dimensions & Weight 4.3" w x 2.4" h x 0.94" d; 4.2 oz. (11 cm x 6.1 cm x 2.4 cm; 120 g)
Connectors &
Fasteners Antenna Connection type: SMA jack
Serial Connector: 15-pin RS232 SUB
D female (DE15S)
Pins: RS232 link, audio link, BOOT,
RESET
Power Connector: 2.5mm miniature
power jack
Operating
Temperatures -30 to +60°C
Certifications CE Mark
EMC: FCC Part 2, 15, 22, 24, EN
55022 & EN 55024
Safety: UL 60950, EN 60950

Specifications
19
Electrical Characteristics
Switching the modem
on/off The device is permanently powered (when connected to the
power supply).
Voltage Range Voltage range: 5 to 32V DC
GND : 0V
Overvoltage and
Undervoltage Correct operation of the Wireless
MultiModem in communication
mode is not guaranteed if input
voltage falls below 5V.

Specifications
20
Input/output electrical characteristics for
external connections
INSTALLATION/ START- UP
800 MHZ 1900 MHZ
Parameters Min Typ. Max Min Typ Ma
x
Unit
Power
Supply @ 25
degrees C:
- Input
Supply
Voltage
513.2 32 5 13.2 32 V
@5V 800 mA
@13.2
V350 mA
Input
supply
current
(in
comm.
mode
at full
Tx
power)
@32V 200 mA
@5V 450 mA
@13.2
V200 mA
Input
supply
current
(in
comm.
Mode
at
averag
eTx
power)
@32V 100 mA