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6-14

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

OL-4652-01

Chapter 6 Configuring and Debugging Fax Services

Debugging the Cisco ATA 186/188 Fax Services

Note rtpcatch works best for analyzing a single VoIP session. Command-line options can be entered in any

order.

Example of rtpcatch

The section contains an example of using rtpcatch and includes an explanation of its output:

Output

C:\>rtpcatch faxpassthru -fax

[ 25]open file: 00.723, (G723) 2.213:10000 => 2.116:10002

[ 26]open file: 01.723, (G723) 2.116:10002 => 2.213:10000

[ 29] <00> 1 silence pkts from TS 1760 (seq# 3)

[ 42] <00> 2 silence pkts from TS 4400 (seq# 9)

[ 47] <00> 2 silence pkts from TS 5600 (seq# 11)

[ 55] <00> 2 silence pkts from TS 7760 (seq# 15)

[ 101]open file: 02.pcm, (G711u) 2.116:10002 => 2.213:10000

[ 106] <02> 2 lost pkts from seq# 39

[ 107]open file: 03.pcm, (G711u) 2.213:10000 => 2.116:10002

[ 110] <03> 1 silence pkts from TS 19440 (seq# 41)

------------ 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

<01.723>: (G723) 2.116:10002 => 2.213:10000

total 38 pkts(76 frames), lost 0 pkts, fill 0 silence pkts

<02.pcm>: (G711u) 2.116:10002 => 2.213:10000

total 2181 pkts(2181 frames), lost 2 pkts, fill 0 silence pkts

<03.pcm>: (G711u) 2.213:10000 => 2.116:10002

total 2179 pkts(2179 frames), lost 0 pkts, fill 1 silence pkts

---------- 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

---------- 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