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28 Avaya IR R2.0 Troubleshooting
• RTP uses a base port of 10,000
The MRCP configuration file
Installing the MRCP feature on Avaya IR creates a configuration file (/vs/sproxy/cfg/mrcp.cfg)
and the default settings shown in the following table.
The configuration file sets parameters for the ports used for signaling and the timing intervals
that Avaya IR uses to determine if it has lost touch with speech resource servers. Under most
circumstances, there is no need to change these default settings.
Parameter Description Default Setting
RTPNumberofPorts The number of ports on Avaya IR available for RTP
connections to MRCP servers.
Note:
The default setting is higher than the number of
ports that Avaya IR can support for ARS and TTS
combined. This helps prevent port conflict.
1000
RTPBasePort The base port number on Avaya IR for the range of
ports used for RTP connections to MRCP servers.
This value, combined with the RTPNumberofPorts
value, defines the range of ports reserved for
connections to MRCP servers.
ASR requests use the lower half of the range, while
TTS requests use the upper half of the range.
The default setting has been set to prevent
conflicts with the RTP ports needed for Voice Over
IP.
Change this value only if you experience port
conflicts.
10000
RTPPacketRate The rate, measured in milliseconds, at which data
is transmitted over each RTP connection.
Change this value to match the packet rate of the
MRCP server at the other end of the connection.
20