Motorola V.3600 manual Local Digital Loopback &T3, Grant/Deny RDL Request &T4, &T5

Test Mode Operation

Local Digital Loopback — &T3

After making the data connection, enter the escape sequence to return to command mode. Entering &T3 puts the local modem in digital loopback. The remote operator can now send a test message which is looped back to the remote terminal screen.

If the test timer (S18) was loaded before issuing the &T3 command the local modem exits the test after the specified number of seconds and returns to command mode. If not, enter &T to exit the test. Enter the command to return to online data mode.

The local modem receiver connects to its transmitter so received data is retransmitted to the remote site.

If Digital Bilateral Loopback is enabled locally, the local DTE is looped back to itself (Figure 7-3). If disabled, the local DTE receives a constant mark.

Figure 7-3. Local Digital Loopback with Bilateral Loopback Enabled

Grant/Deny RDL Request — &T4, &T5

Local operators can deny a request from the remote modem for remote digital loopback.

To allow your modem to be placed in RDL by a remote operator, enter

AT&T4

To prevent your modem from entering RDL, enter

AT&T5

V.3600 7-5