
Chapter 7 Configuring and Debugging Fax Services
Debugging the Cisco ATA 186/188 Fax Services
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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
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[ | 25]<2.213=>2.116> | Codec G723 |
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[ | 26]<2.116=>2.213> | Codec G723 |
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[ | 101]<2.116=>2.213> | Codec G711u/D |
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[ | 102]<2.116=>2.213> | NSE PT 100, EVT 192: | 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: | CED tone Detected |
[ | 107]<2.213=>2.116> | Codec G711u/D |
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This indicates that the audio streams originating at <2.213> and <2.216> are
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PATH: 2.213:10000 => 2.116:10002
[ | 25]Codec | G723 |
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[ | 105]NSE PT 100, EVT 192: | CED tone Detected | |
[ | 107]Codec | G711u/D |
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PATH: 2.116:10002 => 2.213:10000 |
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[ | 26]Codec | G723 |
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[ | 101]Codec | G711u/D |
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[ | 102]NSE PT 100, EVT 192: | 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,
–event 193, ECAN OFF, Phase Reversal Detected
–event 194, ECAN ON, Silence Detected
–event 200, T38 Fax Mode, V.21 Detected
–event 201, T38 Fax Mode ACK
–event 202, T38 Fax Mode NACK
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
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