ZyXEL Communications Prestige 2000W, User Manual

Page: 73 / 81

Prestige 2000W User’s Guide
12-4 Administrator-specific Settings
Figure 12-3 DSP Setting
Table 12-3 DSP Setting
LABEL DESCRIPTION
Default Voice Codec A voice codec converts voice data to electrical signals for transmission over a
network. Choosing a voice codec depends on a tradeoff between transmission
speed, sound quality and desired bandwidth usage.
Out Volume(-14~14) Select the gain for the microphone onboard the Prestige, where –14 is the minium
(least sensitive) and 14 is the maximum (most responsive).
In Volume(-14~14) Select the speaker volume on the Prestige, where –14 is the minium (quietest) and
14 is the maximum (loudest).
Receive 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 Frame 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.