Speech method – Toa N-8000 Series User Manual
Page 117
2-6
Chapter 2
FUNCTIONS AND OPERATION
MASTER STATION'S FUNCTIONS AND OPERATION
[Operation when both stations are engaged in hands-free conversation]
• When both stations (except the N-8410MS) are engaged in hands-free conversation, either full duplex
conversation by way of an echo canceller* or half duplex conversation by way of a voice switch is made
depending on conditions. (Refer to
"FULL DUPLEX AND HALF DUPLEX CONVERSATIONS."
During this conversation, station's internal settings (parameters relating to the condition of sound reflection)
are constantly updated in response to the change in sound collected by the built-in microphone, allowing for
optimum hands-free conversation.
When both stations make hands-free conversation after either one has been moved in a new environment or
the environment surrounding the station has significantly changed, this may cause acoustic feedback. In this
case, continue the conversation and the situation will soon return to the normal condition.
If acoustic feedback cannot be removed, adjust the microphone sensitivity and speaker output volume of the
station.
Note
Use the supplied N-8000 Setting Software (refer to
) to set the microphone sensitivity and
speaker output volume.
It is possible to set the master station's speaker output volume at the station. (Refer to
.)
* An echo canceller is used to eliminate acoustic feedback caused when the voice outputs from the station's
speaker are picked up by the same station's microphone. As acoustic feedback cannot be eliminated
thoroughly, the echo canceller is usually used in conjunction with a voice switch.
• When the N-8410MS is engaged in hands-free conversation, the speech method is the one using a voice
switch only. (Refer to
1.5. Speech Method
1.5.1. Hands-free conversation
Permits conversations to be made without using the handset when a call is made without lifting a handset or
received in automatic connection mode.
or
Duplex conversations