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Troubleshooting
33
Debugging/Logging/Troubleshooting Commands
The AT commands in this section can be used in attempting to troubleshoot or debug a current problem.
Some commands may be enhanced or limited by the debugging/logging/troubleshooting S-registers. For
complete descriptions of the commands and S-registers, see the additional documents on this CD.
Debugging/Logging/Troubleshooting Command Summary
AT
Command Function
>Dn Embedded Protocol Analyzer (EPA)
*FSn Reset TA
*Ln Fatal Error Information
>LOG Display Logging Buffer Contents
>Sn Logging Variables
>TIME Display Current Timestamp
*V Various State Information
Debugging/Logging/Troubleshooting S-Registers
The S-registers in this section can be used in attempting to troubleshoot, debug, or even correct a current
problem. Some S-registers modify functionality of various features. Some S-registers modify the
functionality of the debugging/logging/troubleshooting commands described in the additional documents on
the system CD.
Debugging/Logging/Troubleshooting S-Register Summary
S-register Function
S47 Pulse-dial Maximum Break Pulse Period
S48 Pulse-dial Maximum Interdigital Pause
S72 EuroISDN Variant
S90 Local PPP Capabilities
S91 Remote PPP Capabilities
S92 Channel ID Information Element Octet 3 Settings
S93 Blacklisting
S94 Minimum Buffer Space After Trigger
S95 Logging Buffer Functionality
S96 Decode (EPA) Buffer Functionality
S98 ISDN_MSG Size
S99 Startup Options
S100 Flow Control High Threshold
S101 Flow Control Low Threshold
S102 Data to Save for Decoding
None of the LEDs light when the MTA128ST/NTis on
When you turn on the MTA128ST/NT, the LED indicators on the front panel should flash briefly as the TA
runs a self-test. If the LEDs remain off, the TA probably is not receiving power.
• Make sure the MTA128ST/NT’s power switch is on, especially if you normally turn on the TA by
turning on a power strip.
• If the power supply is plugged into a power strip, make sure the power strip is plugged in and its
power switch is on.
• Make sure the power supply module is firmly connected to the MTA128ST/NT and to the wall outlet
or power strip.
• If the power strip is on and the MTA1 28ST/NT is switched on, try moving the TA’s power supply to
another outlet on the power strip.
• Test that the outlet is live by plugging a lamp into it.