Cisco Systems ATA 186 manual 6-15, FAX Summary

Chapter 6 Configuring and Debugging Fax Services

Debugging the Cisco ATA 186/188 Fax Services

This indicates that rtpcatch detected two lost RTP packets in the audio path <02>. The missing packets began with sequence number 39. This occurred at packet number 106.

•------------ Summary --------------

Input file: faxpassthru.cap

<00.723>: (G723) 2.213:10000 => 2.116:10002

total 38 pkts(70 frames), lost 0 pkts, fill 7 silence pkts

This indicates that the input filename is faxpassthru.cap. The output file 00.723 contains the G.723-compressed stream from <2.123:10000> to <2.116:10002>; 38 packets (70 frames) were processed by rtpcatch. No lost packets were detected and seven silence packets were found.

•---------- FAX Summary 1 ----------

[	25]<2.213=>2.116>	Codec G723
[	26]<2.116=>2.213>	Codec G723
[	101]<2.116=>2.213>	Codec G711u/D
[	102]<2.116=>2.213>	NSE PT 100, EVT 192: Up-Speed,	CED tone Detected
[	103]<2.116=>2.213>	NSE PT 100, EVT 193: ECAN OFF,	Phase Reversal Detected
[	105]<2.213=>2.116>	NSE PT 100, EVT 192: Up-Speed,	CED tone Detected
[	107]<2.213=>2.116>	Codec G711u/D

This indicates that the audio streams originating at <2.213> and <2.216> are G.723-compressed. The audio stream from <2.116> was then up-sped to G.711µ-law at packet number 101. The NSE signaling packets were sent at packet number 102, 103 and 105. Finally, the audio stream from <2.113> was up-sped to G.711µ-law.

•---------- FAX Summary 2 ----------

PATH: 2.213:10000 => 2.116:10002

[	25]Codec	G723
[	105]NSE PT 100, EVT 192: Up-Speed,		CED tone Detected
[	107]Codec	G711u/D
PATH: 2.116:10002 => 2.213:10000
[	26]Codec	G723
[	101]Codec	G711u/D
[	102]NSE PT 100, EVT 192: Up-Speed,		CED tone Detected
[	103]NSE PT 100, EVT 193: ECAN OFF,		Phase Reversal Detected

This summarizes the fax events for each path.

The audio stream events reported by rtpcatch include:

–beginning of new audio codec

–silence packets

–lost packets

–erased packets (as in G.729)

The NSE events reported by rtpcatch include:

–event 32, Fax Mode, CED tone Detected (RFC2833)

–event 34, Modem Mode, ANSam tone Detected (RFC2833)

–event 192, Up-Speed, CED tone Detected

–event 193, ECAN OFF, Phase Reversal Detected

–event 194, ECAN ON, Silence Detected

–event 200, T38 Fax Mode, V.21 Detected

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)

OL-4803-01 6-15