Paradyne 3821PLUS manual Remote Digital Loop, Local Digital Loop, Pattern

COMSPHERE 3821Plus Modem

If the Test Timeout configuration option is enabled, Test Timeout appears at the conclusion of the test. If it is disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to Table 3-10in this chapter.

A Ring Indicate during this test can cause errors.

To exit this function and remain in the Test branch,

press the key. To exit and return to the Top-Level

menu, press the key.

Remote Digital Loop

Rem Digital Loop performs a remote digital loopback (ITU-T V.54 Loop 2). This test can verify the integrity of the local modem, the communications link, and the remote modem. Any data or pattern entered at the local DTE is sent to and returned from the remote modem. For this test to operate properly, the modems must be online and in Synchronous or Asynchronous Direct mode and, if set for V.34 modulation, must not be in Asymmetric Rate mode.

To access Rem Digital Loop from the Test branch,

press the key until Rem Digital Loop appears. Press any function key to start this test.

The message Started appears on the LCD, and the Test LED lights for the duration of the test.

If the Test Timeout configuration option is enabled, Test Timeout appears at the conclusion of the test. If it is disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to Table 3-10in this chapter.

To exit this function and remain in the Test branch,

press the key. To exit and return to the Top-Level

menu, press the key.

Local Digital Loop

Loc Digital Loop is issued by a local modem and

forces it to loopback any data received from the remote modem. (This test operates the same as a ITU-T V.54 Loop 2 except it is issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital loopback from its location. For this test to operate properly, the modems must be online and in Synchronous or Asynchronous Direct mode and, if set for V.34 modulation, must not be in Asymmetric Rate mode.

To access Loc Digital Loop from the Test branch,

press the key until Loc Digital Loop appears. Press any function key to start this test.

The message Started appears on the LCD and the Test LED lights.

If the message Invalid Command appears on the LCD, then another test is in progress. Select Abort to clear the current test and then select Loc Digital Loop.

If the Test Timeout configuration option is enabled, Test Timeout appears at the conclusion of the LCD. If it is disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to Table 3-10in this chapter.

To exit this function and remain in the Test branch,

press the key. To exit and return to the Top-Level

menu, press the key.

Pattern

Pattern can transmit and receive a 511 bit error rate test pattern. It can also be used with a local analog loopback or a remote digital loopback to simulate data passing through the modem. For this test to operate properly, the modems must be online and in Synchronous or Asynchronous Direct mode. Otherwise, the message Invalid:Bffr Mde appears when this test is started.

To access Pattern from the Test branch, press the key until Pattern appears. Select Pattern to start this test.

BlksErrd=xxxxxxx displays the number of blocks of data found in error (block size is 1000 bits per block). The message NoSync can appear as a value for BlksErrd while the modem's receiver is synchronizing. The message OvrFlw can appear as the value for BlksErrd if the counter overflows.

Press the key to display BlksRcvd=xxxxxxx, number of blocks of data received.

The Pattern test can be exited and reentered without restarting the test. The BlksErrd and BlksRcvd continue counting.

If the Test Timeout configuration option is enabled, Test Timeout appears at the conclusion of the test. If it is disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to Table 3-10in this chapter.

3-14 January 1999 3821-A2-GB20-40