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COMSPHERE 3821Plus Modem
3-14 February 1998 3821-A2-GB20-30
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 3-10 in 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 3-10 in 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 3-10 in 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 3-10 in this chapter.