Multi-Tech Systems MTCBA-C Troubleshooting Frequently Asked Questions, Troubleshooting Examples

Page 24

Chapter 4 – Troubleshooting and Frequently Asked Questions

Chapter 4 – Troubleshooting and

Frequently Asked Questions

Troubleshooting Examples

Situation A: The modem does not respond through the serial link

If the wireless MultiModem does not respond through the serial link upon an attempted transmission of data or voice signals, see the table below for possible causes and solutions.

Solutions for ‘no connection through serial link’ situation

If the	Then ask …	Action
modem
returns …
(nothing)	Is the modem	Provide a power supply in the range of 5 to 32Vdc.
	powered correctly?
	Is the serial cable	Check the cable connection.
	properly connected to	Verify cable pinout.
	the modem and PC	Verify reception & transmission.
	sockets?
	Is the communication	In communications program, verify that modem
	program properly	parameters have been set to the values shown here:
	configured?	Data bits = 8
		Parity = none
		Stop Bits = 1
		Baud = 115200 bps
	Is another program	Close any such application program.
	interfering with the
	communication
	program?

Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide

24

Image 24

Contents MultiModem Cdma MultiModem Cdma User Guide Wireless Modem S000303J, Revision J CopyrightRevision History Revision Date Description Trademarks and LogosContents Product Description Specifications FeaturesProduct Description ModelsWireless MultiModem used in remote ATM application Application OverviewApplication Types Benefits/Features in Applications Safety General SafetyRF Interference Issues Safety Instructions for Hazardous LocationsMaintenance of Your Modem Package ContentsYour Responsibility Specifications Electrical CharacteristicsMode Description Functions Cdma ModesAntenna/RF Specifications InterfacesLEDs RS232 15-Pin Connector Pinout AT Command InformationDesignation Activation Installation Activate Your Wireless AccountHook up the Antenna, Serial Cable, and Power Serial Cable Power Optional Attach the Modem to a Flat Surface Screw Separation = 125 mm or 4 1516 inchesInstall the Modem Driver Verifying That Your Modem Has Been Installed SuccessfullyIntroduction RequirementsUsing Your Wireless Modem Phone Numbers for the Wireless ModemExamples of Useful AT Commands Establishing a Circuit-Switched Data CSD Connection Answering a Circuit-Switched Data CSD ConnectionEstablishing a Voice Call Using Short Message Services SMS SMS Examples Send Example Sending an SMS messageInternet Access Connecting to the Cdma Network for Internet AccessDisconnecting the Connection Create Your Dial-Up Connection in Windows XP/2003Mobile PhoneTools Troubleshooting Frequently Asked Questions Troubleshooting ExamplesFrequently Asked Questions Why does the modem answer and then do nothing?Just received this modem, what do I need to do? Who are the carriers?What is the max supported serial baud rate? Modem will not answerModem answers, but does nothing How does faxing work?Wireless Modem Reference Information Data Cable Diagram No VoiceReference Information GeneralReference Information Appendix a Warranty and Repairs Multi-Tech Warranty StatementRepair Procedures for U.S. and Canadian Customers Repair Procedures for International CustomersRepair Procedures for International Distributors Replacement PartsJuly