User`s guide

Device Management
7-12
6700-A2-GY31-70
July 1999
DTE Loopback
Choose DTE Loopback from the Test pull-down menu to run a DTE Loopback
test. The DTE Loopback test is valid only for 3600 Series DSUs with TDM/MCMP
installed.
Remote Digital Loopback
Choose Remote Digital Loopback from the Test pull-down menu to run a Remote
Digital Loopback test. This test connects the remote digital receiver to the remote
digital transmitter.
A remote device must be connected before this test can run. If no remote device
is connected to the local device, or to change the currently connected device, use
Call Setup. If no remote device is connected, a dialog box appears directing you
to use Call Setup. See Chapter 8,
Dial Function,
for information on connecting or
disconnecting a device.
If desired, select Pattern (BERT) to cause a bit error rate test (BERT) pattern to
be transmitted and received while monitoring for errors. If Pattern (BERT) is
selected the test time (DURATION) appears.
To change the test time, choose either the up arrow to increase the time or the
down arrow to decrease the time. The test time can be changed from 30 to
900 seconds (15 minutes) in 10-second increments. Refer to
Range Field
in
Appendix A,
NMS Windows Conventions
, for more details on using this field.
While the test is running, periodic results (approximately every 30 seconds)
appear in the lower portion of the window. At the completion of the test, the
Pattern results appear. See
Pattern (BERT)
on page 7-13 for a detailed
description of the test parameter fields.