AudioCodes Mediant 800B User Manual page 465

User's Manual
Parameter
RTP Redundancy Depth
rtp-redundancy-depth
[IpProfile_RTPRedundancyD
epth]
Gateway
Early Media
early-media
[IpProfile_EnableEarlyMedia]
Version 7.2

Two secured medias grouped in the first ANAT group, one with
IPv4 and the other with IPv6. The first is the preferred type.

Two non-secured medias grouped in the second ANAT group, one
with IPv4 and the other with IPv6. The first is the preferred type.
Note:

The parameter is applicable only when the device offers an SDP.

The IP addressing version is determined according to the first SDP
"m=" field.

The feature is applicable to any type of media (e.g., audio and
video) that has an IP address.

The corresponding global parameter is MediaIPVersionPreference.
Enables the device to generate RFC 2198 redundant packets. This
can be used for packet loss where the missing information (audio) can
be reconstructed at the receiver's end from the redundant data that
arrives in subsequent packets. This is required, for example, in
wireless networks where a high percentage (up to 50%) of packet loss
can be experienced.

[0] 0 = (Default) Disable.

[1] 1 = Enable - previous voice payload packet is added to current
packet.
Note:

When enabled, you can configure the payload type, using the
RFC2198PayloadType parameter.

For the Gateway application only: The RTP redundancy dynamic
payload type can be included in the SDP, by using the
EnableRTPRedundancyNegotiation parameter.

The corresponding global parameter is RTPRedundancyDepth.
Enables the Early Media feature for sending media (e.g., ringing)
before the call is established.

[0] Disable (default)

[1] Enable

Digital: The device sends a SIP 18x response with SDP,
allowing the media stream to be established before the call is
answered.

Analog: The device sends a SIP 183 Session Progress
response with SDP instead of a 180 Ringing, allowing the
media stream to be established before the call is answered.
Note:

Digital: The inclusion of the SDP in the 18x response depends on
the ISDN Progress Indicator (PI). The SDP is sent only if PI is set
to 1 or 8 in the received Proceeding, Alerting, or Progress
messages. See also the ProgressIndicator2IP parameter, which if
set to 1 or 8, the device behaves as if it received the ISDN
messages with the PI.

CAS: See the ProgressIndicator2IP parameter.

ISDN: Sending a 183 response depends on the ISDN PI. It is
sent only if PI is set to 1 or 8 in the received Proceeding or
Alerting messages. Sending 183 response also depends on
the ReleaseIP2ISDNCallOnProgressWithCause parameter,
465
20. Coders and Profiles
Description
Mediant 800B Gateway & E-SBC