Motorola V.3600 manual Remote Digital Loopback &T6, Remote Digital Loopback with Self Test &T7

Test Mode Operation

Remote Digital Loopback — &T6

The initiating modem signals the remote modem to go to Digital Loopback. The remote modem receives and then retransmits data back to the local modem. If Digital Bilateral Loopback is enabled on the remote modem, the remote DTE is looped back to itself (Figure 7-4).

Figure 7-4. Remote Digital Loopback with Digital Bilateral Loop Enabled at the Remote Site

After making the data connection, enter the escape sequence to return to command mode. Entering &T6 places the remote modem in digital loopback provided the remote operator has entered the &T4 command to allow an RL request. Enter a test message and verify the message is being looped back to your terminal screen. If the message is incorrect, use the analog loopback tests on both modems to isolate the problem. If both modems run analog loopback without errors, the problem could be with the phone line.

Remote Digital Loopback with Self Test — &T7

After making the data connection, enter the escape sequence to return to command mode. Entering &T7 places the remote modem in digital loopback provided the remote operator enters &T4 to allow an RL request. Once in RDL/TP, the local modem transmits a test pattern and automatically verifies that the remote modem is looping the pattern back (Figure 7-5). Enter &T to exit RDL/TP and return to command mode. Enter the O command to return online in data mode.

7-6 V.3600