7. Testing7990-A2-GB20-20 September 2004 7-7Send and Monitor 511 PatternThe Send command is used to send a test pattern over the DSL interface. This testcommands the remote unit to start sending and monitoring a 511 pattern, and thensends and monitors a 511 pattern. Ones are sent in the time slots that are mappedto the DSL port that is in test.Pressing Enter after selecting the Send and Monitor 511 Pattern Start commandfrom the DSL & G.703 Tests menu initiates the test. The result field initiallydisplays hh:mm:ss - Out of Sync, where hh:mm:ss is the time that the testhas been running. The error count displays Out of Sync until the unit has detectedthe 511 pattern.Once the pattern is detected, the error count field is updated once every 10seconds. It is displayed as a five-digit number with the maximum count being99999.The Send and Monitor 511 test is not a loopback test. Each unit independentlysends and monitors a 511 pattern.Activating the Send and Monitor 511 Pattern test causes the EOC (used formanagement) to be lost to the remote unit.ProcedureTo run a Send and Monitor 511 test:1. Allow the modem to fully train up with its partner modem for at least a minute.2. Position the cursor at the Start command next to Send and Monitor 511 on theDSL & G.703 Tests screen.3. Press Enter. If the test begins successfully, the Start command is changed toStop. Else:— If the DSL interface is down when Start is selected, no action is taken.— If the unit is already sending a test pattern on the DSL interface, thenInvalid - Send Pattern Already Active appears on line 24.— If any loopback test is active, an Invalid Test Combination error messageappears on line 24.4. To manually stop the test, verify that the cursor is positioned at the Stopcommand, and press Enter.The result field remains until another Send test is started. The DSL interfaceretrains after the test is stopped.
