Avaya 555-233-116 manual Configuring the 7400B Data Module, Selecting command mode on the 7400B

Data modules and asynchronous data units

Configuring the 7400B Data Module

The factory default settings for the7400B data module are generally satisfactory. But if you need to change them, you use a terminal device and the AT command language commonly used by Hayes-compatible modems (7400B data modules have no control buttons). While a full explanation of the Hayes command set is beyond the scope of this book, the following sections sketch the basic processes involved in changing the factory settings.

Installing required configuration equipment for the 7400B

Before you can enter AT configuration commands, you must first connect a terminal or a PC with a keyboard, monitor, and terminal-emulation software to the data module. Proceed as follows.

1.Connect one end of an RS-232 cable to an RS-232, serial-communications port (often called a COM port) on the terminal or PC.

2.Connect the other end of the RS-232 cable to Port 1 of the data module

3.If you are using a PC, start your terminal emulation software.

Selecting command mode on the 7400B

When it is transmitting and receiving data, the 7400B data module is online, in data mode. To configure the 7400B, you have to switch it to command mode. Proceed as follows.

1.From the terminal keyboard, enter the escape sequence: +++

The data module enters command mode and displays the OK result code.

Displaying the current configuration on the 7400B

1. Enter at&v

Enabling automatic answering on the 7400B

1.Enter ats0=nnn

where nnn is a decimal number in the range 1-255.

Enabling remote operation on the 7400B

The exact configuration of any particular 7400B data module depends on what it is being used for. Consult a list of Hayes-compatible AT commands to see what is possible. The following is an example of a typical, custom configuration.

78 Issue 4 October 2002 555-233-116