| iLBC frame size |
| This defines the size of the iLBC codec frame. The default setting is 20ms. |
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| iLBC payload type |
| This defines the iLBC payload type. The default setting is 97. The valid |
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| range is between 96 and 127. |
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| Silence Suppression |
| This controls the silence suppression/VAD feature of G723 and G729. If set |
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| to “Yes”, when a silence is detected, small quantity of VAD packets (instead |
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| of audio packets) will be sent during the period of no talking. If set to “No”, |
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| this feature is disabled. |
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| Voice Frames per TX |
| This field contains the number of voice frames to be transmitted in a single |
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| packet. When setting this value, the user should be aware of the requested |
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| packet time (used in SDP message) as a result of configuring this parameter. |
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| This parameter is associated with the first vocoder in the above vocoder |
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| Preference List or the actual used payload type negotiated between the 2 |
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| conversation parties at run time. |
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| e.g., if the first vocoder is configured as G723 and the “Voice Frames per TX” |
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| is set to be 2, then the “ptime” value in the SDP message of an INVITE |
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| request will be 60ms because each G723 voice frame contains 30ms of |
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| audio. Similarly, if this field is set to be 2 and if the first vocoder chosen is |
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| G729 or G711 or G726, then the “ptime” value in the SDP message of an |
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| INVITE request will be 20ms. |
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| If the configured voice frames per TX exceeds the maximum allowed value, |
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| the phone will use and save the maximum allowed value for the |
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| corresponding first vocoder choice. The maximum value for PCM is |
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| 10(x10ms) frames; for G726, it is 20 (x10ms) frames; for G723, it is 32 |
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| (x30ms) frames; for G729/G728, 64 (x10ms) and 64 (x2.5ms) frames |
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| respectively. |
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| Fax Mode |
| T.38 (Auto Detect) FoIP by default, or |
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| PCMU/PCMA) |
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| Layer 3 QoS |
| This field defines the layer 3 QoS parameter which can be the value used for |
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| IP Precedence or |
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| Layer 2 QoS |
| This setting includes two fields. The 802.1Q/VLAN Tag contains the value |
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| used for layer 2 VLAN tag. Default setting is blank. And 802.1p priority value |
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| contains the value of the priority value. |
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| Allow incoming SIP |
| If set to “Yes”, the device will ignore any SIP message that does not come |
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| messages from SIP |
| from the IP address (Source IP in the IP header) that it is registered |
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| proxy only |
| to. Default is No. |
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| Use DNS SRV |
| This parameter controls whether the IP phone supports the DNS SRV route |
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| function. |
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| User ID is phone |
| If the |
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| number |
| field will be set to “Yes”. Otherwise, set it to “No”. If “Yes” is set, a |
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| “user=phone” parameter will be attached to the “From” header in SIP request. |
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| SIP Registration |
| This parameter controls whether the IP phone needs to send REGISTER |
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| messages to the proxy server. The default setting is “Yes”. |
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| Unregister On Reboot |
| Default is No. If set to yes, the device will first send registration request to |
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| remove previous bindings. |
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Grandstream Networks, Inc. | Page 19 of 28 | ||||
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| Firmware 1.1.0.31 | Last Updated: 1/2009 | |