ZTE Corporation ZXV10P802 Manuale Utente
80
including G.711(a/µ) (also known as PCMU/PCMA),
G.723.1, G.729A/B, G.726-32, iLBC, G.722
(wide-band).
Configure Vocoders in a preference list that is included
with the same preference order in SDP message.
Enter the first Vocoder in this list by choosing the
appropriate option in “Choice 1”. Similarly, enter the
last Vocoder in this list by choosing the appropriate
option in “Choice 8”.
G.723.1, G.729A/B, G.726-32, iLBC, G.722
(wide-band).
Configure Vocoders in a preference list that is included
with the same preference order in SDP message.
Enter the first Vocoder in this list by choosing the
appropriate option in “Choice 1”. Similarly, enter the
last Vocoder in this list by choosing the appropriate
option in “Choice 8”.
SRTP Mode
Enable SRTP mode based on selection. Default is
“No”.
“No”.
Symmetric RTP
Selects whether or not symmetric RTP is supported.
Silence Suppression This controls the silence suppression/VAD feature of
the audio codec G.723 and G.729. If set to “Yes”, when
silence is detected, a small quantity of VAD packets
(instead of audio packets) will be sent during the period
of no talking. If set to “No”, this feature is disabled.
silence is detected, a small quantity of VAD packets
(instead of audio packets) will be sent during the period
of no talking. If set to “No”, this feature is disabled.
Voice Frames per
TX
TX
This field contains the number of voice frames to be
transmitted in a single Ethernet packet (be advised the
IS limit is based on the maximum size of Ethernet
packet is 1500 byte (or 120kbps)).
When setting this value, be aware of the requested
packet time (ptime, used in SDP message) is a result
of configuring this parameter. This parameter is
associated with the first codec in the above codec
Preference List or the actual used payload type
negotiated between the 2 conversation parties at run
time. E.g., if the first codec is configured as G.723 and
the “Voice Frames per TX” is set to 2, then the “ptime”
value in the SDP message of an INVITE request will be
60ms because each G.723 voice frame contains 30ms
of audio. Similarly, if this field is set to 2 and the first
codec is G.729 or G.711 or G.726, then the “ptime”
value in the SDP message of an INVITE request will be
20ms.
transmitted in a single Ethernet packet (be advised the
IS limit is based on the maximum size of Ethernet
packet is 1500 byte (or 120kbps)).
When setting this value, be aware of the requested
packet time (ptime, used in SDP message) is a result
of configuring this parameter. This parameter is
associated with the first codec in the above codec
Preference List or the actual used payload type
negotiated between the 2 conversation parties at run
time. E.g., if the first codec is configured as G.723 and
the “Voice Frames per TX” is set to 2, then the “ptime”
value in the SDP message of an INVITE request will be
60ms because each G.723 voice frame contains 30ms
of audio. Similarly, if this field is set to 2 and the first
codec is G.729 or G.711 or G.726, then the “ptime”
value in the SDP message of an INVITE request will be
20ms.