Debugging Voice Data - Patton electronics SmartNode Series Software Configuration Manual

SmartWare Software Configuration Guide
Cause : normal call clearing
private network serving local user - CCITT - Q.931
Progress indicator : inband information available
private network serving local user - CCIT
Explanation:
• "
unit(cfg)#call 55 dial 50 dest-interface TERMINAL
55 to the interface TERMINAL. If a phone connected to the port that binds to interface TERMINAL has
MSN 50 configured, it will start to ring. This is the case in our example.
• You just have verified that ISDN layer1-3 and the context CS interface TERMINAL are configured so that
a call with called-party 50 can be handled. If this is not the case (no response or a RELEASE message), con-
tinue debugging ISDN signaling.
• "
unit(cfg)#call 55 drop
You can proceed as in this example with any other context CS interface, also for VoIP protocols like SIP and
H.323.

Debugging voice data

There are several debug monitors that can help identify problems in VoIP connections. The most common
VoIP problems are: voice quality problems (dropouts), fax transmission errors, no establishment of voice con-
nection, and wrong tone or playback.
An overview of all available VoIP debug monitors is given below. Some more specific examples for debugging
cases follow after that.
Overview: VoIP and DSP debug monitors
debug voip dejitter
debug voip events
debug voip rtp
debug voip t38 events
Debugging voice data
": Drops the call initiaed with the dial command.
Displays changes to the settings of the dejitter buffer, exceptions (under-
run, overrun, packet drops) and size changes.
Usage: To investigate problems related to voice quality, voice packet
payload sizes, delays, jitter
Displays control activities on the Data Path (path of voice/fax data
packets within your unit): State changes, tone start/stop, DTMF play-
back/detection, fax/modem detection.
Usage: To investigate problems with voice connections, DTMF, tone
playback, fax and modem transmissions.
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 T.38 related call parameters at call setup, and operational
errors like lost packets.
Usage: To investigate problems with T.38 Fax transmissions in general
42 • VoIP debugging
": Dial the number 50, wich calling-party
513