Matrix SPARSH VP710 User Guide
677
•
Repeat the above step to add more codecs to the
Enable Codecs
column.
•
To remove the codec from the
Enable Codecs
column, select the desired codec and then click
.
•
To adjust the priority of codecs, select the desired codec and then click
or
.
•
Click
Confirm
to save the change.
Packetization Time
Ptime (Packetization Time) 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)
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
Содержание SPARSH VP710
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