Alcatel-Lucent Halo H3P - Acoustic Clarity Features

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PTime is a measurement of the duration (in milliseconds) of the audio data in each RTP packet
sent to the destination, and defines how much network bandwidth is used for the RTP stream
transfer. Before establishing a conversation, codec and ptime are negotiated through SIP
signaling. The valid values of ptime range from 10 to 60, in increments of 10 milliseconds. The
default ptime is 20ms.
Topics
Supported PTime of Audio Codec
PTime Configuration
The following table summarizes the valid values of ptime for each audio codec:
Codec
Packetization Time
(Minimum)
Packetization Time
(Maximum)
G722
10ms
40ms
PCMA
10ms
40ms
PCMU
10ms
40ms
G729
10ms
80ms
iLBC
20ms
30ms
iLBC_15_2kpbs
20ms, 40ms, 60ms
iLBC_13_33kpbs
30ms, 60ms
opus
10ms
20ms
The following table lists the parameter you can use to configure the PTime.
Parameter
AudioPacketTimeX
config.<mac>.xml
Description
It configures array of rtp packet interval (in ms) of 6 codecs
(PCMU/PCMA/G729AB/G722/ILBC/OPUS) in sequence for accountX.
Permitted
Values
10
20
30
40
50
60
Default
20;20;20;20;20;20
Web UI
Account -> Codec -> Ptime
The early media refers to the media (for example, audio and video) played to the caller before a
SIP call is actually established.
Current implementation supports early media through the 183 message. When the caller receives
a 183 message with SDP before the call is established, a media channel is established. This
channel is used to provide the early media stream for the caller.
To optimize the audio quality of your network, Halo series phones support the acoustic clarity
technology: Acoustic Echo Cancellation (AEC), Background Noise Suppression (BNS), Automatic