Prestige 2000W_V2 User’s Guide
Table 20 PHONE
LABEL | DESCRIPTION |
|
|
Default Voice Codec | A voice codec (coder/decoder) converts voice data to electrical signals |
| for transmission over a network. |
| Use this field to select the type of voice coder/decoder (codec) that you |
| want the Prestige to use. Choosing a voice codec depends on a tradeoff |
| between transmission speed, sound quality and desired bandwidth |
| usage. G.711 provides higher voice quality than G.729 but requires |
| 64kbps of bandwidth while G.729 only requires 8kbps. The Prestige can |
| only connect to other phones that use the same codec as the Prestige. |
| If you want to use G.711, G.711u is used mainly in North America and |
| G.711a is used in most of the rest of the world. |
Speaking | Select the default gain for the Prestige’s microphone, where |
| minimum (least sensitive) and 14 is the maximum (most responsive). |
| The callee may hear an echo if you set the microphone’s volume to the |
| maximum. |
Listening | Select the default speaker volume on the Prestige, where |
| minimum (quietest) and 14 is the maximum (loudest). |
RTP Port | Real time Transport Protocol is used to handle voice data transfer. Use |
| this field to configure the Prestige’s listening port for RTP traffic. Leave |
| this field set to the defaults if you were not given a RTP port to use. |
Jitter Buffer | A larger receiving buffer allows the Prestige to rearrange data packets |
| that arrive in the wrong order. |
| Packets are dropped if they arrive out of order and the receiving buffer |
| is full. |
| Increasing the buffer size introduces latency. Too large and a significant |
| delay could be introduced over a slow connection, too small and the |
| signal may distort. |
Voice Frames per Packet | Use smaller packet sizes to reduce the number of speech frames sent |
| per packet. If a small packet does not reach its destination is it less |
| significant than if the packet contained many speech frames. |
DTMF Relay | Dual Tone |
| on the Keypad and communicate information (such as telephone |
| numbers) to the VoIP gateway. |
| Select disable to send the DTMF digits uncompressed from the |
| remaining protocols to use a compression method to match that of your |
| ITSP’s. |
| Select Inband(RFC 2833) to send the DTMF tones in RTP packets. |
| Select Outband to send the DTMF tones in SIP messages. |
|
|
DTMF Payload | This field allows you to set the DTMF payload type. It is recommended |
| to leave the default setting for this field. |
APPLY | Click APPLY to save your changes without restarting the Prestige. Your |
| wireless LAN, Internet and SIP settings changes do not take affect until |
| you use RESTART (in the navigation panel). |
CANCEL | Click CANCEL to begin configuring this screen afresh. |
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100 | Chapter 13 Administrator Web Configurator Screens |