Configuring Audio Features
751
To configure the
opus sample rate via web user interface (take SIP-T54S IP phones for
example:
1.
Click on
Account
->
Codec
.
2.
Select the desired value from the pull-down list of
Opus Sample Rate
.
3.
Click
Confirm
to accept the change.
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:
Codec
Packetization Time
(Minimun)
Packetization Time (Maximun)
G722
10ms
40ms
PCMA
10ms
40ms
PCMU
10ms
40ms
G729
10ms
80ms
G726-16
10ms
30ms
G726-24
10ms
30ms
Содержание SIP-T19 E2 T4 Series
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