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 Volume(-14~14)

Select the default gain for the Prestige’s microphone, where –14 is the

 

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 Volume(-14~14)

Select the default speaker volume on the Prestige, where –14 is the

 

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 Multi-Frequency signals are generated when you press a key

 

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 (0-127)

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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Chapter 13 Administrator Web Configurator Screens

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ZyXEL Communications 2000W manual Administrator Web Configurator Screens