How do I perform an analog loopback test?The modem should be connected to a PC with Hyperterminal or another terminal program.
1) Start your terminal or HyperTerminal program
2) Go from START to PROGRAMS to ACCESSORIES and COMMUNICATIONS and HYPERTERMINAL
3) In the CONNECTION DESCRIPTION enter any name and click ok
4) At the screen CONNECT TO open the menu CONNECT USING
5) Select DIRECT TO COM PORT X when X is the COM PORT connected to the modem
6) In COM X PROPERTIES select a speed of 57600 and leave everything else at default. Click on OK
7) Now you should be in the HYPERTERMINAL screen
8) Press AT then ENTER, you should get a response of OK
9) You are now communicating with the modem
Whether you do or do not see what you are typing Type AT&W1Z then ENTER. This will set the defaults to factory.
The analogue loop back test allows you to verify that the receiver and transmitter are functioning properly.
Ensure that the modem speed is other than 300 bps.
On the modem panel you should have TR and a speed LED lit
To place the modem in Analogue loop back ORIGINATE mode now type ATU0 then ENTER.
The CD LED should light up and now everything that you type should be echoed to the screen.
To terminate this test turn modem OFF and ON again.
To place modem in Analogue loop back ANSWER mode now type ATU1 and ENTER. The CD LED should light up and now everything that you type should be echoed to the screen. To terminate this test turn modem OFF and ON again.
If you don't receive any characters or receive garbage characters during the originate and answer test, you may have a faulty modem. Contact Tech Support for additional help.