Patton electronic SmartNode 4110 Series ユーザーズマニュアル

Debugging voice data

SmartWare Software Configuration Guide 

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:

Example: Debugging Fax connections

Symptoms: Fax transmission starts but is interrupted and the Fax machines terminate with an error message, 
Fax transmission does not start at all, the unit’s firmware does not detect Fax.

Displays RTP related call parameters at call setup: local/remote IP 
address and port, SSRC. During operation, displays periodically 
updated statistics containing the number of sent and received packets, 
the number of lost packets.
Usage: To verify that RTP packets are sent/received, and to debug net-
work quality issues (lost packets).

Displays control activities on the TDM part of the Data Path.
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.

Traces detected Modem and Fax tones.
Traces the flow of T.30 communication states between the fax machines.
Decodes the IFP (Internet Fax Protocol) elements within T.38 packets.
Displays T.38 related call parameters and operational errors like lost 
packets. 
Tracks the operation of the dejitter buffer used for T.38 Fax transmis-
sions. 
Usage: To investigate problems with T.38 Fax and Modem transmissions in 
general.

Displays detected errors over all the different parts of the Media Gate-
way.

Enables/Disables all Media Gateway monitors