Chapter 4 - Troubleshooting And Frequently Asked Questions; Troubleshooting Examples; Situation A: The Modem Does Not Respond Through The Serial Link - Multitech MTCBA-C-N1 User Manual

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 ...
modem
returns ...
(nothing) Is the modem
powered correctly?
Is the serial cable
properly connected to
the modem and PC
sockets?
Is the communication
program properly
configured?
Is another program
interfering with the
communication
program?
Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide
Chapter 4 – Troubleshooting and Frequently Asked Questions
Action
Provide a power supply in the range of 5 to 32Vdc.
Check the cable connection.
Verify cable pinout.
Verify reception & transmission.
In communications program, verify that modem
parameters have been set to the values shown here:
Data bits = 8
Parity = none
Stop Bits = 1
Baud = 115200 bps
Close any such application program.
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