Grandstream Networks, Inc. | ||
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Voice Frames per TX
Video Frame Rate
Video bit rate (kbps)
Video fit to Screen
Layer 3 QoS
Layer 2 QoS
No Key Entry Timeout
Use # as
Send Key
This field contains the number of voice frames to be transmitted in a single Ethernet packet (be advised the max. size of Ethernet packet is 1500 byte (or 120k bit) so user should be aware that there IS a limit there). When setting this value, the user should be aware of the requested packet time (ptime, used in SDP message) as 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 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 codec 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 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 G726, it is 20 (x10ms) frames; for G723, it is 32 (x30ms) frames; for G729/G728, 64 (x10ms) and 64 (x2.5ms) frames respectively.
Please be very careful when massage those parameters. By adjust this, user also get jitter buffer changed accordingly.
Incorrect setting will affect voice quality so do not touch the parameter if not understand and most of the case the default value will work in GS products. Please refer to the Codec FAQ in our website for more technical details:
Default value is 15 frames/second. User adjustable based on network condition.
Default value is 128 kbps. User adjustable based on network environment.
When the received image size is bigger than the LCD resolution (QVGA), the GXV3000 can scale the image to fit the LCD or crop it.
This field defines the layer 3 QoS parameter which can be the value used for IP Precedence or
This contains the value used for layer 2 VLAN tag. Default setting is blank.
Default is 4 seconds.
This parameter allows users to configure the “#” key to be used as the “Send” (or “Dial”) key. If set to “Yes”, pressing this key will immediately trigger the sending of dialed string collected so far. In this case, this key is essentially equivalent to the “(Re)Dial” key. If set to “No”, this “#” key will then be included as part of the dial string to be sent out.
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