7-15
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
Chapter7 Configuring and De bugging Fax Services
Debugging the Cisco ATA 186/188 Fax Services
------------ 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) wer e
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 Detec ted
[ 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 Detec ted
[ 107]<2.213=>2.116> Codec G711u/D
This indicates that the audio streams originating at <2.213> and <2.216> are G.723-c ompressed.
The audio stream from <2.116> was then up-sped to G.7 11µ-law at packet number 101. The NSE
signaling packets were sent at packet number 102, 103 and 105. Fi nally, 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
event 201, T38 Fax Mode ACK
event 202, T38 Fax Mode NACK