Netronix SIP 60X, Руководство пользователя

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SIP 60X User Manual
Page 35 of 43
PROFILE PAGE DEFINITIONS
Setting Options Meaning
Voice Frames per TX
This field contains the number of voice frames to be
transmitted in a single packet. When setting this value, the
user should be aware of the requested packet time (used in
SDP message) as a result of configuring this parameter.
This parameter is associated with the first vocoder in the
above vocoder Preference List or the actual used payload
type negotiated between the 2 conversation parties at run
time. e.g., if the first vocoder is configured as G723 and the
“Voice Frames per TX” is set to be 2, then the “ptime” value
in the SDP message of an INVITE request will be 60ms
because each G723 voice frame contains 30ms of audio.
Similarly, if this field is set to be 2 and if the first vocoder
chosen is G729 or G711 or G726, then the “ptime” value in
the SDP message of an INVITE request will be 20ms. If the
configured voice frames per TX exceeds the maximum
allowed value, the SIP 60X will use and save the maximum
allowed value for the corresponding first vocoder choice.
The maximum value for PCM is 10(x10ms) frames; for
G726, it is 20 (x10ms) frames; for G723, it is 32 (x30ms)
frames; for G729/G728, 64 (x10ms) and 64 (x2.5ms)
frames respectively.
G723 Rate Defines the encoding rate for G.723 vocoder.
By default, 6.3kbps rate is chosen.
iLBC Frame Size Sets the iLBC frame size in 20ms or 30ms
iLBC Payload type Defines payload type for iLBC. Default value is 97.
The valid range is between 96 and 127.
G726-16 Payload type
Default value is 98. Range is from 96 to 127.
G726
– 24 Payload
type
Default value is 99. Range is from 96 to 127.
G726
– 40 Payload
type
Default value is 103. Range is from 96 to 127.
G729E payload type
Default value is 102. Range is from 96 to 127.
VAD
Default is No . VAD allows detecting the absence of audio
and conserve bandwidth by preventing the transmission of
"silent packets" over the network.
Symmetric RTP
Default is No . When set to Yes the device will change the
destination to send RTP packets to the source IP address
and port of the inbound RTP packet last received by the
device.
Fax Mode
T.38 (Auto Detect) FoIP by default, or Pass-Through (must
use codec PCMU/PCMA)