Administrator’s Guide for SIP-T5 Series Smart Media Phones
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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.
The following table summarizes the valid values of ptime for each audio codec:
Packetization Time
(Minimun)
Packetization Time (Maximun)
Procedure
PTime can be configured using the following methods.
Central Provisioning
(Configuration File)
Configure the ptime.
Parameter:
account.X.ptime
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