P-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 Volume(- | Select the default gain for the Prestige’s microphone, where |
14~14) | (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 Volume(- | Select the default speaker volume on the Prestige, where |
14~14) | (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 of a buffer could |
| introduce a significant delay with a slow connection. Too small of a buffer may |
| result in packets being lost. |
Voice Frames per | Use smaller packet sizes to reduce the number of speech frames sent per |
Packet | 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 |
| 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 VoIP service |
| provider’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 (0- | This field allows you to set the DTMF payload type. It is recommended to leave |
127) | 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. |
|
|
102 | Chapter 13 Administrator Web Configurator Screens |
VoIPon www.voipon.co.uk | sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 600030 |
