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Using the MultiTech CDMA Cellular Modem – Application Note #17 – Page 1 of 4

5 Gould Road, PO Box 2155

New London, NH 03257

Voice: (603) 526-9088

[email protected]

www.canarysystems.com

Using the MultiTech CDMA Cellular Modem

Application Note #17

Overview

This Application Note provides information to setup and configure the MultiTech MultiModem CDMA

Wireless (Cellular) Modem, model MTCBA-C-N3-NAM for Verizon service, as well as configuration

information to setup and configure MultiLogger to communicate with a data acquisition system using this

modem and a data acquisition unit equipped with a Campbell Scientific, Inc. CR10X Control Module

(MCU).

A PC running MultiLogger will be used to communicate with the data acquisition unit connected to the

MultiTech MultiModem via a standard dialup telephone modem.

More detailed information on the MultiTech MultiModem can be found in the User Guides on the CD

included with the Modem. More detailed information on MultiLogger can be found in the MultiLogger

User’s Guide.

To complete the setup of the Modem, a service agreement will need to be obtained from Verizon.

Verizon will need the ESN (Electronic Serial Number in Hex and Decimal) located on the back of the

Modem, in order to provide service and a telephone number for the Modem. The command AT+CGSN is

used to determine the ESN.

MultiTech MultiModem Configuration

Important Note: The current (as of May 2005) firmware version 2.05 does not allow the MultiTech

MultiModem, that is being used with Verizon Wireless service, to receive calls. It must be returned to

MultiTech to have the newer version 2.13 installed to enable this capability. The command AT+CGMR is

be used to determine the firmware version. If necessary, call (800) 328-9717 to arrange the firmware

upgrade.

The MultiTech MultiModem is configured using a communication program (

Hyperterminal

) and the DB15 x

DB9 RS-232 cable supplied with the modem. Except for configuring the phone number, configuration can

be accomplished with or without a service agreement. Set up

Hyperterminal

with Data Bits = 8, Parity =

none, Stop Bits = 1, and Baud Rate = 115200 bps. These are the default settings for the MultiModem’s

serial port. Apply power (

5 V to 32VDC)

to the MultiModem and allow a few seconds for it to “boot” up.

There are 6 LED Indicators on the MultiModem as described below:

Light

Name

Description

Transmit Data Lit when modem is transmitting data.

Receive Data Lit when modem is receiving data.

Carrier Detect Lit when data connection has been established.

Line Status

Continuous “on” state

indicates that the wireless modem is not registered on the

network. Flashing state indicates registration on network. Off state. Modem is off

(not ready) or in download mode.

Terminal Ready Commonly called “Data Terminal Ready.” This is a readiness signal from the PC.

PWR

Power Indicates presence of DC power when lit.

1 2 3 4

Verification 2

Inhaltsverzeichnis

Seite 1

Using the MultiTech CDMA Cellular Modem – Application Note #17 – Page 1 of 4 5 Gould Road, PO Box 2155 New London, NH 03257 Voice: (603) 526-9088 in

Seite 2 - Verification

Using the MultiTech CDMA Cellular Modem – Application Note #17 – Page 2 of 4 With power and the RS-232 cable connected the PWR and CD LED’s should b

Seite 3

Using the MultiTech CDMA Cellular Modem – Application Note #17 – Page 3 of 4 To Set Auto-Answer: Auto Answer is set by changing the S0 Register from

Seite 4

Using the MultiTech CDMA Cellular Modem – Application Note #17 – Page 4 of 4 Enter the phone number of the MulitModem in the edit Dialed Using Phone

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