Full duplex and half duplex conversations, Speech method, P. 8-2 – Toa N-8000 Series User Manual
Page 602
8-2
Chapter 8
APPENDIX
1. FULL DUPLEX AND HALF DUPLEX CONVERSATIONS
1.1. Speech Method
The Packet Intercom system uses 5 types of methods for conversations between stations.
For conditions in which these speech methods are used, refer to the table on
.
1.1.1. Full duplex conversation between handset stations
This method is the same as that used for an ordinary
subscribed telephone.
Simultaneous two-way conversations are possible
between both parties.
(Refer to
p. 8-5, "Full duplex."
)
1.1.2. Full duplex conversation using an echo canceller
An echo canceller realizes simultaneous two-way
conversations between both parties.
(Refer to
p. 8-5, "AEC."
)
The echo canceller is a circuit to prevent echo or
feedback that possibly occurs when sound from the built-
in speaker enters the microphone.
1.1.3. Half duplex conversation using a voice switch
This is one-way conversation from a speaking station to
a listening station.
When a party speaks after the other party's speech has
ended, the speech transmission direction is reversed,
allowing two-way alternate conversations.
Note that speech overlapped during speech will not
change the transmission direction.
(Refer to
p. 8-5, "VS."
)
Full duplex conversation
Full duplex conversation
One-way conversation
One-way conversation