920 Communications Diagnostic Tests
This procedure uses SSP procedures (for example, PROBLEM) to diagnose communications problems.
Diagnostic tests for
data
communications attempt to locate problems with internal
and
some external
data
communications interfaces. There are four types
of
diagnostic tests for
data
communications:
• Diagnostic tests during IPL
• Diagnostic tests during
on
line problem determination
• Diagnostic tests during concurrent maintenance
• Diagnostic tests during customer setup (CSU)
Diagnostic Tests During IPL
Diagnostic tests during IPL test the communications hardware;
data
is
wrapped through the line adapters.
Diagnostic Tests During
On
line Problem Determination
Diagnostic tests during
on
line problem determination (pROBLEM) test the communications hardware,
microcode, and local and remote work stations.
See
the manual System Problem Determination - 5363 for
procedures.
Diagnostic Tests During Concurrent Maintenance
Concurrent diagnostic tests are run under SSP while the system
is
operating
on
other jobs. Only the line
being tested must be assigned to the test when these tests are run. The other lines can
be
used for system
data
communication.
Concurrent diagnostic tests include:
• SDLCTEST: The SDLC on line test verifies correct operation
of
the communications link between two
systems,
or
between the system and attached SDLC devices.
See
"955 Running the SDLC On line Test"
on
page 9-9.
• BSCTEST: The BSC on line test verifies correct operation
of
the communications link between two
systems,
or
between the system and attached BSC devices.
See
"950 Running the BSC On line Test"
on
page 9-8.
• ST ATEST: The station test verifies correct operation
of
the communications link between the system
and the remote work stations.
Note: When
STATEST
is
started to test a switched line, the primary station (host) waits for a call from
the secondary station (remote) to start the station test.
STATEST is
run
on
a line
that
is
varied
on
and
runs concurrent with other traffic
on
the line.
• COMMTEST: The communications concurrent diagnostic test has the following option:
Basic communications diagnostic test: This test checks
out
the communications hardware and
external cables where possible. All lines must be varied off.
Diagnostic Tests During Customer Setup
Diagnostic tests during customer setup (CSU) test the communications hardware;
data
is
wrapped through
the line adapters.
9-4 5363 Maintenance Information
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