MGCPDTMFDetectionPoint, DTMFVolume, DTMFTransportType, DTMFDigitLength,
and DTMFInterDigitInterval
13.3.3.2 Configuring RFC 2833 Payload
The procedure below describes how to configure the RFC 2833 payload using the Web
interface:
To configure RFC 2833 payload using the Web interface:
1. Open the RTP/RTCP Settings page (Configuration tab > VoIP menu > Media
submenu > RTP/RTCP Settings). The relevant parameters are listed under the
'General Settings' group, as shown below:
Figure 13-7: RFC 2833 Payload Parameters in RTP/RTCP Settings Page
2. Configure the following parameters:
• 'RTP Redundancy Depth' (RTPRedundancyDepth) - enables the device to
generate RFC 2198 redundant packets.
• 'Enable RTP Redundancy Negotiation' (EnableRTPRedundancyNegotiation) -
enables the device to include the RTP redundancy dynamic payload type in the
SDP, according to RFC 2198.
• 'RFC 2833 TX Payload Type' (RFC2833TxPayloadType) - defines the Tx RFC
2833 DTMF relay dynamic payload type.
• 'RFC 2833 RX Payload Type' (RFC2833RxPayloadType) - defines the Rx RFC
2833 DTMF relay dynamic payload type.
• 'RFC 2198 Payload Type' (RFC2198PayloadType) - defines the RTP redundancy
packet payload type according to RFC 2198.
3. Click Submit to apply your settings.
13.3.4 Configuring RTP Base UDP Port
You can configure the range of UDP ports for RTP, RTCP, and T.38. The UDP port range
can be configured using media realms in the Media Realm table, allowing you to assign
different port ranges (media realms) to different interfaces. However, if you do not use
media realms, you can configure the lower boundary of the UDP port used for RTP, RTCP
(RTP port + 1) and T.38 (RTP port + 2), using the 'RTP Base UDP Port' (BaseUDPport)
parameter. For example, if the BaseUDPPort is set to 6000, then one channel may use the
ports RTP 6000, RTCP 6001, and T.38 6002, while another channel may use RTP 6010,
RTCP 6011, and T.38 6012.
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