Contents

MRCP Server Properties

The following server properties are available for the MRCP server. For information about configuring the properties, see Configure the MRCP Server.

Property Name	Description
Signaling Network Interface	Network interface for sending SIP messages to the MRCP Server. The default interface is Any. If you select Any, the system uses the default network interface for the server. Options, such as Any, Local Area Connection, and Loopback Pseudo-Interface 1, vary depending on the network interfaces defined on the server.
SIP Address	SIP address that the MRCP server uses. The default is `sip:mresources@localhost:5060`. If you don't set this value, the system includes a warning in the logs. You configure the initial value during the install.
SIP Protocol	Indicates whether to use TCP or UDP to communicate with the MRCP Server. The default is TCP. You configure the initial value during the install. Note: If the MRCP server supports TCP, we recommend that you use this protocol.
HTTP Grammar Cache Port	HTTP port used for the grammar cache. The default is 0. Specify 0 to disable the HTTP grammar server. If enabled, we recommend using port 8124.
HTTP QOS DSCP Value	DSCP value to tag on HTTP messages when HTTP QOS Tagging Enabled is set to True. Select a DSCP value from the list box. If HTTP QOS Tagging Enabled is set to False, the system ignores this variable. The default value is no tagging.
HTTP QOS Tagging Enabled	Indicates whether to tag HTTP messages to the MRCP server with the HTTP QOS DSCP Value. The default value is False.
MRCP Server Audio Format	Audio format to send to the MRCP server. Select the audio format from the list box. The MRCP Server must support the selected format or recognitions fail. The default value is audio/PCMU (MuLaw, 64 Kbps).
RTCP QOS DSCP Value	DSCP value to tag on RTCP messages when RTCP QOS Tagging Enabled is set to True. Select a DSCP value from the list box. If RTCP QOS Tagging Enabled is set to False, the system ignores this variable. If you don't specify this property, it defaults to the RTP QOS DSCP Value.
RTCP QOS Tagging Enabled	Indicates whether to tag RTCP messages to the MRCP server with the RTCP QOS DSCP Value. If you don't specify this property, it defaults to the RTP QOS Tagging Enabled value.
RTP Port Range	Ports to use to send RTP messages. To configure the values for the range, type the starting port number in the left box and the ending port number in the right box. To add another range, click Add Value.
RTP QOS DSCP Value	DSCP value to tag on RTP messages when RTP QOS Tagging Enabled is set to True. Select a DSCP value from the drop-down list. If RTP QOS Tagging Enabled is set to False, the system ignores this variable. The default value is 46 (decimal).
RTP QOS Tagging Enabled	Indicates whether to tag RTP messages to the MRCP server with the RTP QOS DSCP Value. The default value is False.
RTP Send Interface Address	Network interface address used to send RTP messages. Type the address to use to send RTP messages. If not specified, the system uses the default network interface.
SIP Invite Timeout	Length of time in milliseconds to wait for a final response to a session's initial SIP Invite request. The default timeout value is 3000 ms.
SIP Listener Port	Port to listen for SIP requests. The SIP Listener Port only handles BYE requests from the MRCP Server. The default port number is 9060.
SIP QOS DSCP Value	DSCP value to tag on SIP messages when SIP QOS Tagging Enabled is set to True. Select a DSCP value from the list box. If SIP QOS Tagging Enabled is set to False, the system ignores this variable. The default value is 24 (decimal).
SIP QOS Tagging Enabled	Indicates whether to tag SIP messages to the MRCP server with the SIP QOS DSCP Value. The default value is False.
SIP Timer T1	Round-trip time estimate. The default value is 500 ms.
SIP Timer T2	Maximum retransmission interval for non-INVITE requests and INVITE responses. The system ignores this setting when the SIP Protocol is not UDP. The default value is 1000 ms.
SIP Timer T4	Maximum duration that a message can remain in the network. The default value is 5000 ms.
Vendor	Name of the third-party ASR engine vendor, such as `nuance`. If the system doesn't recognize the vendor name, the system ignores this value. If you require vendor-specific adjustments for MRCP integration, specify the vendor name to allow configuration of MRCP properties.