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U.S. Robotics I-modem Command Reference

Testing • Page 14-10

setting instead. To perform remote digital loopback testing with a U.S.

Robotics modem that does not use the &T test repertoire, that modem

should be set to S16=8.

Remote Digital Loopback Testing

Testing Using Keyboard Data (S16=8)

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.

U. S. Robotics modems should be set to &T4. (Older U.S. Robotics modems should be

set to S16=8.)

4. Send the I-modem ATS16=8O.

The I-modem enters remote digital loopback mode and then goes back online (O com-

mand). It then transmits the test signals, causing the remote device to enter remote digi-

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US Robotics COURIER Manual de usuario Pagina 172