Audio Features
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Packetization Time (PTime)
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. You can also disable the ptime negotiation.
Topics
Supported PTime of Audio Codec
PTime Configuration
Supported PTime of Audio Codec
The following table summarizes the valid values of ptime for each audio codec:
Codec Packetization Time (Minimum) Packetization Time (Maximum)
G.722.1c(48kb/s) 20ms 60ms
G.722.1c(32kb/s) 20ms 60ms
G.722.1c(24kb/s) 20ms 60ms
G.722.1(24kb/s) 20ms 60ms
G722 10ms 40ms
PCMA 10ms 40ms
PCMU 10ms 40ms
G729 10ms 80ms
G726-16 10ms 30ms
G726-24 10ms 30ms
G726-32 10ms 30ms
G726-40 10ms 30ms
G723_53/
G723_63
30ms 60ms
iLBC 20ms 30ms
opus 10ms 20ms
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