Patton electronics SmartNode Series Software Configuration Manual page 516

42 • VoIP debugging
debug voip t38 dejitter
debug voip demux
debug voip cs
debug dsp events
debug dsp errors
debug dsp t30
debug dsp ifp
Depending on the type of problem, some debug monitors are more useful than others. Try to avoid enabling all
monitors at the same time, as this generates a lot of output and can degrade system performance. The follow-
ing examples show some typical debug cases and what monitors should be switched on in these cases.
Example: Debugging voice connections
Symptoms: Voice quality is bad (dropouts), the voice connection is only established in one direction or not at
all, there is only noise instead of voice, no tones are played (e.g. dialtone).
Prerequisite: The call is established from a signaling point of view (see chapters Debug H.323 Data and Debug
Session Control Data).
Use the following debug monitors to start with:
Step
unit #debug voip events
1
2 unit #debug dsp error
3 unit #debug voip rtp
514
Tracks the operation of a special dejitter buffer used for T.38 Fax trans-
missions.
Usage: To document the influence of network quality on T.38 Fax trans-
missions.
Displays changes to the "context demultiplexer".
Usage: To identify problems when no voice connection can be estab-
lished.
Displays control activities on the TDM part of the Data Path: DSP
resource allocation, TDM timeslot switching, hair pinning).
Usage: To investigate problems with hair pinning or timeslot switching.
Displays control activities on the DSP including all call parameters (e.g.
the used codec).
Usage: To document the DSP parameters used for each call setup.
Displays DSP errors (e.g. configuration errors, DSP software crashes,
under/overruns).
Usage: To investigate in all kind of problems that involve a DSP (voice
connections, fax, tones, ...)
Traces the flow of T.30 communication states between the fax machines
(for T.38 Fax transmission only), and logs changes. Gives approx.
10lines of debug output per transmitted fax page.
Usage: To debug all T.38 Fax related problems.
Decodes the IFP (Internet Fax Protocl) elements within T.38 packets.
More detailed decoding than T.30 monitor, but can generate a lot of
output.
usage: To debug Fax related problems.
Command
SmartWare Software Configuration Guide
Purpose
Enable the voip events monitor .
Enable the DSP error monitor.
Enable the RTP debug monitor
Debugging voice data