Motorola 68230 Operation Guide - Page 71

DSU Troubleshooting

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DSU Troubleshooting Introduction Use the following information to help troubleshoot potential installation problems. Potential Installation Problems Installation problems may include the following: • Improper telephone company interface connection • Incorrect DSU port Clock Source option • No signal from telephone company interface CTP-Derived Information The following information may be derived from the CTP. Function Node Statistics Port Statistics Monitor DSU Internal Loopback used to... • verify that the software is a version that contains the DSU option modifications. • show if the software recognizes the DSU. • verify that data is sent without error; error counts may denote an error in clocking mode configuration. • show if the software recognizes the DSU. • determine, via input/output signals, if the DSU option is in a loopback mode requested by the remote end (which would result in an inability to send data); continuous bipolar violations indicate the remote system is out of service. • indicate a failure of this loopback mode, meaning a connection has not been made.

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DSU Troubleshooting
Introduction
Use the following information to help troubleshoot potential installation
problems.
Potential Installation Problems
Installation problems may include the following:
•
Improper telephone company interface connection
•
Incorrect DSU port Clock Source option
•
No signal from telephone company interface
CTP-Derived Information
The following information may be derived from the CTP.
Function
used to...
•
verify that the software is a version that contains
the DSU option modifications.
Node Statistics
•
show if the software recognizes the DSU.
•
verify that data is sent without error; error counts
may denote an error in clocking mode
configuration.
Port Statistics
•
show if the software recognizes the DSU.
Monitor
•
determine, via input/output signals, if the DSU
option is in a loopback mode requested by the
remote end (which would result in an inability to
send data); continuous bipolar violations indicate
the remote system is out of service.
DSU Internal Loopback
•
indicate a failure of this loopback mode, meaning
a connection has not been made.