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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)
OL-4803-01
Chapter 6 Configuring and Debugging Fax Services
Debugging the Cisco ATA 186/188 Fax Services
rtpcatch Limitations
• rtpcatch performs optimally when analyzing capture files containing only one VoIP session.
• rtpcatch detects only G.711A, G.711µ-law, G.723, G.729, T.38, Cisco fax relay, modem
pass-through with or without redundancy packets, RTCP packets and NSE packets.
• rtpcatch can handle a maximum of 20 prserv ports using the -port option.
• rtpcatch may not detect T.38 packets correctly.