US Robotics COURIER Bedienungsanleitung PDF herunterladen (Seite 169)

U.S. Robotics I-modem Command Reference

Testing • Page 14-7

4. Send the I-modem the AT&T6 com-mand. The I-modem enters remote digital loopback

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

5. Type a short message. It will be looped back to your I-modem by the remote device and

to your screen for veriÞcation. (The remote user will not see your data.)

6. Send the escape code, +++, and then AT&T0 to end the test.

Alternatively, you can end the test by sending ATH, ATZ, or ATZ! Be careful, 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

Data errors indicate a problem with the remote device or with the phone link.

7. Send AT&M4, unless you used a reset command (ATZ or ATZ!).

Testing Using a Built-in Test Pattern (&T7)

This test option causes the I-modem to perform a remote digital loopback test by sending

a built-in test pattern. An internal error detector counts any errors and, when the test is

ended, sends the number of errors or 000 (no errors) to the screen.

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US Robotics COURIER Bedienungsanleitung Seite 169