Telenetics V.3600 Series, User Manual

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V.3600 7-1
Chapter 7
Test Mode Operation
Diagnostic tests are used to isolate faults in the communications path.
Diagnostic tests terminate after the period of time specified by
S18
. If
S18
is set to 0, the timer is disabled and tests will run continuously. Tests
may also be terminated by the
&T
command. When in test modes without
a test pattern, issue the escape sequence
+++
to return to command mode
before terminating the test with the
&T
command.
Note
Local analog loopback with or without a test pattern is the only
test available in protocol mode.
Test Categories
Diagnostic tests fall into two categories: those that can be performed
online or offline and those that must be performed online. Refer to
Table 7-1.
Note
These tests do not apply to fax mode and should only be
performed when the modem is configured for data operation.
Table 7-1. Diagnostic Tests
Test Offline Online
Local Analog Loopback (LAL) X X
Local Analog Loopback with Self Test (LAL/TP ) X X
Local Digital Loopback (LDL) X
Remote Digital Loopback (RDL) X
Remote Digital Loopback with Self Test (RDL/TP) X
Test Pattern (TP) X