Cisco ATA188-I2-A Administration Guide - Page 162
Analyzing prserv Output for Fax Sessions, Log event, Description
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Debugging the Cisco ATA 186/188 Fax Services Chapter 7 Configuring and Debugging Fax Services As prserv receives debug information from the Cisco ATA, it displays the information on the DOS screen and saves it to the output file .log. Once you are finished capturing debug information, you can stop prserv by entering Ctrl-C at the DOS prompt. If you restart the process without changing the name of the log file, any new debug information is appended to the end of the original file. Analyzing prserv Output for Fax Sessions The debug log obtained from prserv is for detecting simple configuration problems. Note A comprehensive understanding of the fax events requires the use of the rtpcatch tool (see the "Using rtpcatch for Diagnosing Fax Problems" section on page 7-12). Table 7-2 lists log events relevant to analyzing a fax session. Table 7-2 Debug Log Examples Log event Description [ch] Enable encoder Voice encoder type pt is enabled for the channel ch, where pt can be 0 for G.711µ-law, 4 for G.723.1, 8 for G.711A-law, and 18 for G.729. For example, [0]Enable encoder 4 indicates that the Cisco ATA transmitted G.723.1-encoded voice packets. [ch] DPKT 1st: , pt The first voice packet that the Cisco ATA received was of RTP payload type pt for the channel ch with timestamp of timestamp1, and the local decoding timestamp was set to timestamp2. For example, [0]DPKT 1st: 1491513359 1491512639, pt 4 indicates that the first RTP packet that the Cisco ATA received was G.723.1-encoded for channel 0. [ch] codec: => Voice codec switchover occurred. The voice encoder type switched from pt1 to pt2 for the channel ch. For example, [0]codec: 4 => 0 indicates that the local voice encoder on the Cisco ATA switched from G.723.1 to G.711µ-law. [ch] Rx MPT PT= Channel ch received an NSE packet of event with payload type of NSE pkt NSEpt. For event, c0XXXXXX indicates a CED tone event, and c1XXXXXX indicates a phase reversal event. For example, [0]Rx MPT PT=100 NSE pkt c0000000 indicates that the Cisco ATA received a CED tone event NSE packet with payload type of 100. [ch] Tx MPT PT= NSE Channel ch transmitted an NSE packet of event with payload type of pkt NSEpt. For event, c0XXXXXX indicates a CED tone event, and c1XXXXXX indicates a phase reversal event. For example, [0]Tx MPT PT=100 NSE pkt c0000000 indicates that the ATA transmitted a CED tone event NSE packet with payload type of 100. 7-10 Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0) OL-4804-01