US Robotics COURIER Manual do Utilizador descarregar pdf (Página 170)

U.S. Robotics I-modem Command Reference

Testing • Page 14-8

You don't need to type anything during this test. The I-modem sends only its Þnal error

count to your screen.

1. Send the command AT&M0&N3S14.0=0 to prepare the I-modem for testing.

This command disables error control, Þxes the connection rate at 2400 bps, and makes

the I-modem return to Command mode

when you type the escape code (+++).

2. Establish a connection with the remote device.

3. If you haven't already done so, arrange with the remote user to cooperate with the test.

If necessary, set the remote device to acknowledge the remote digital loopback request.

For example, older U.S. Robotics modems need to be set to S16=8.

4. Send the AT&T7 com-mand to the I-modem. The I-modem enters remote digital loop-

back mode, and, if the I-modem is an external model, the MR status light ßashes.

The I-modem sends its built-in test pattern to the remote device, which loops it back to

your I-modem. You will not see the data on your screen.

5. Send the escape code, +++, and then AT&T0 to end the test. You can also end the test

by sending ATH, ATZ, or ATZ! Be careful, though, because ATZ and ATZ! reset the I-

modem in addition to ending the test.

If you issue an invalid command, the I-modem sends an ERROR message. If you set

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US Robotics COURIER Manual do Utilizador Página 170