TABLE 12: ADVANCED SETTINGS CONFIGURATION PAGE DEFINITIONS
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| Admin Password |
| Administrator password. Only the administrator can configure the “Advanced Settings” page and |
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| “Account x” pages. Password field is purposely blank for security reasons after clicking update and |
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| saved. The maximum password length is 25 characters. |
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| G723 rate |
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| G.723 audio codec encoding rate, either 6.3kbps or 5.3kbps, check with ITSP or Server/Proxy. |
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| Silence |
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| This controls the silence suppression/VAD feature of the audio codec G.723 and G.729. |
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| Suppression |
| If set to “Yes”, when silence is detected, a small quantity of VAD packets (instead of audio pack- |
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| ets) will be sent during the period of no talking. |
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| If set to “No”, this feature is disabled. |
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| Voice Frames |
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| This field contains the number of voice frames to be transmitted in a single Ethernet packet (be |
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| per TX |
| advised the limit is based on the maximum size of Ethernet packet which is 1500 byte or 12kbps). |
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| When setting this value, be aware the requested packet time (ptime, used in SDP message) is a |
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| result of configuring this parameter. This parameter is associated with the first codec in the above |
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| codec Preference List or the actual used payload type negotiated between the 2 conversation par- |
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| ties at run time. e.g., if the first codec is configured as G.723 and the “Voice Frames per TX” is set |
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| to 2, then the “ptime” value in the SDP message of an INVITE request will be 60ms because each |
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| G.723 voice frame contains 30ms of audio. Similarly, if this field is set to 2 and the first codec is |
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| G.729 or G.711 or G.726, then the “ptime” value in the SDP message of an INVITE request will be |
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| 20ms. |
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| If the configured voice frames per TX exceeds the maximum allowed value, the IP phone will use |
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| and save the maximum allowed value for the corresponding first codec choice. The maximum val- |
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| ue for PCM is 10 (x10ms) frames; for G.726, it is 20 (x10ms) frames; for G.723, it is 32 (x30ms) |
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| frames; for G.729/G.728, 64 (x10ms) and 64 (x2.5ms) frames respectively. |
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| Please be careful when editing these parameters. Adjusting these parameters will also change the |
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| jitter buffer. The GXV300x has a patent jitter buffer handling algorithm. |
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| Grandstream recommends using the default settings and not adjusting these parameters. |
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| Incorrect settings will affect the voice quality. |
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| Video Frame Rate |
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| Default value is 15 frames/second. The video frame rate is adjustable based on network condi- |
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| tions. Increasing the frame rate will increase the amount of data significantly therefore con- |
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| suming more bandwidth. Lack of bandwidth the video will get impaired due to packet loss. |
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| Video bit rate |
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| Default value is 128 kbps. The video bit rate is adjustable based on network environment. |
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| (kbps) |
| Increasing video bit rate may improve video quality if bandwidth allows. |
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| Otherwise the video quality will get impaired due to packet loss. |
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| Video downloading bit rate can also be adjusted after video conversation is established. |
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| - Use MWI button | to toggle between VOLUME, BIT RATE, and Tone Remapping Filter |
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| mode. |
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| - After choosing the feature, use UP and DOWN arrow button to adjust. By pressing the UP and |
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| DOWN button, GXV300X sends out SIP INFO to tell remote party increase/decrease its uploading |
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| rate. |
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| Video Packet Size |
| Default value is 1400, range from 100 to 1400. |
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| Recommended using 600~800 if you have Outbound Proxy or Media Gateway. |
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| Video Rate |
| Frame or TMN8. Default is Frame. |
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| Control |
| TMN8 is good for bandwidth bigger than 384kbps |
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| Grandstream Networks, Inc. | GXV300x User Manual | Page 27 of 54 |
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| Firmware 1.2.3.7 | Updated: 12/2010 |
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