Grandstream Networks BudgeTone-200 User Manual page 23

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G723 rate Encoding rate for G723 codec. By default, 6.3kbps rate is set.
iLBC frame size iLBC packet frame size. Default is 20ms. For Asterisk PBX, 30ms might be required.
iLBC payload Payload type for iLBC. Default value is 97. The valid range is between 96 and 127.
type
Silence This controls the silence suppression/VAD feature of the audio codec G.723 and G.729.
Suppression 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.
Voice Frames This field contains the number of voice frames to be transmitted in a single Ethernet
per TX 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.
If the configured voice frames per TX exceeds the maximum allowed value, the IP phone
will use and save the maximum allowed value for the corresponding first codec choice.
The maximum value for PCM is 10 (x10ms) frames; for G.726, it is 20 (x10ms) frames;
for G.723, it is 32 (x30ms) frames; for G.729/G.728, 64 (x10ms) and 64 (x2.5ms) frames
respectively.
Please be careful when editing these parameters. Adjusting these parameters will also
change the dynamic jitter buffer. The BT has a patent dynamic jitter buffer handling
algorithm. The jitter buffer range is 20 ~ 200 ms.
Grandstream recommends using the default settings provided. Grandstream does not
recommend adjusting these parameters if you are an average user. Incorrect settings
will
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This field defines the layer 3 QoS parameter. It is the value used for IP Precedence or
Layer 3 QoS
Diff-Serv or MPLS. Default value is 48.
Layer 2 QoS This contains the value used for layer 2 VLAN tag. Default setting is blank.
Data VLAN Tag Default is 0 for [0-2]. Enabling the Data VLAN filtering will help reduce the load on the
phone, but it isn't necessary in most environments. This is primarily for VLAN filtering
where tagged traffic will be forwarded to the DSP.
No Key Entry Default is 4 seconds.
Timeout
Use # as This parameter allows users to configure the "#" key as the "Send" (or "Dial") key. If set
Dial Key to "Yes", the "#" key will immediately send the call. In this case, this key is essentially
equivalent to the "Dial" key. If set to "No", the "#" key is included as part of the dial string.
Grandstream Networks, Inc.
affect the voice quality.
BT200/201 User Manual
Firmware 1.2.2.19
Please refer to the
for more technical detail.
Last Updated: 12/2009
Codec FAQ at
Page 23 of 33