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| Force INVITE |
| Session Timer can be refreshed using INVITE method or UPDATE method. Select |
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| “Yes” to use INVITE method to refresh the session timer. Default is No, |
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| Send |
| Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon |
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| Fax |
| completion of Fax to continue session in audio only. |
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| Enable Silence |
| For fax machines that do not send a Disconnect when fax is done. This option |
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| Detection for Fax |
| Enables/Disables the detection of silence in order to know the fax has finished. The |
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| Disconnect |
| silence period is |
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| Enable 100rel |
| Default is No, If set to Yes, Enables the use of PRACK (Provisional Acknowledgment) |
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| method. |
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| Use First Matching |
| Default is No. If set to “Yes”, device will include only the first match vocoder in its |
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| Vocoder in 200OK SDP |
| 200OK response, otherwise it will include all match vocoders in same order received in |
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| INVITE. |
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| Preferred Vocoder |
| The HT70X supports up to 5 different Vocoder types including G.711 |
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| 32, G.723.1, G.729A/B/E, iLBC. The user can configure Vocoders in a preference list |
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| that will be included with the same preference order in SDP message. The first |
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| Vocoder is entered by choosing the appropriate option in “Choice 1”. The last Vocoder |
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| is entered by choosing the appropriate option in “Choice 8”. |
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| Vocoder types can also be changed per call basis by using a star code. Please see the |
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| “Call features” section. |
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| G723 Rate |
| Default is 6.3kbps. Defines the encoding rate for G.723.1 vocoder. |
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| iLBC Frame Size |
| Default is 20ms. Sets the iLBC frame size in 20ms or 30ms. |
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| iLBC Payload type |
| Defines payload type for iLBC. Default value is 97. The valid range is between 96 and |
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| 127. |
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| VAD |
| Default is No. VAD allows detecting the absence of audio and conserve bandwidth by |
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| preventing the transmission of "silent packets" over the network. |
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| Symmetric RTP |
| Default is No. When set to Yes the device will change the destination to send RTP |
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| packets to the source IP address and port of the inbound RTP packet last received by |
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| the device. |
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| Fax Mode |
| T.38 (Auto Detect) FoIP by default, or |
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| Default is Enabled. It makes the unit send out the |
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| Detection Mode |
| Through if a fax tone is detected. |
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| Jitter Buffer Type |
| Select either Fixed or Adaptive based on network conditions. Default is Adaptive. |
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| Jitter Buffer Length |
| Select Low, Medium or High based on network conditions. Default is Medium. |
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| ∙ High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet |
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| the high requirement |
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| ∙ Medium (initial 100ms, min 20ms, max 200ms) |
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| ∙ Low (initial 50ms, min 10ms, max 100ms) |
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| SRTP Mode |
| This option defines different implementation of support SRTP (squired RTP) |
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| FIRMWARE VERSION 1.0.3.1 | HT70X USER MANUAL | Page 42 of 52 |
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