Multi-tech-systems MTCBA-G-F1 Manual do Utilizador descarregar pdf (Página 21)

Chapter 4 – Safety

Multi-Tech Systems, Inc. MultiModem GSM/GPRS User Guide 21

Chapter 3: Troubleshooting

Troubleshooting Examples

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

If the Wireless MultiModem does not answer 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

modem

returns …

Then ask … Action

Is the modem

powered correctly?

Provide a power supply in the range of 5 to

32Vdc.

Is the serial cable

properly connected

to the modem and

PC sockets?

Connect cable per step 5 of the ”Electrical

Installation and Configuration” procedure. Verify

cable pinout per”RS232 15-Pin Connector Pinout”

table, esp Rx & Tx connections. Verify reception

& transmission.

Is the

communication

program properly

configured?

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

(nothing)

Is another program

interfering with the

communication

program?

Close any such application program.

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Multi-tech-systems MTCBA-G-F1 Manual do Utilizador Página 21