This is an extremely poor and technically incorrect explanation, however
I understand what the writer was attempting.
Full duplex is defined as the ability to transmit and receive data
simultaneously. Half duplex is defined as the ability to transmit or to
receive data at any moment at time.
Telephones are typically full duplex. Even if you talk while the other
person is talking, you can hear that other person. You may not
understand them, but you hear them. Simple two-way radio systems such as
CB or common ham radios operate in half duplex mode. When the microphone
is keyed, the receiver is automatically disabled. This prevents the user
from destroying the front end of the receiver, amongst other things.
More sophisticated two-way radio systems such as cellular phones and
some systems used by emergency services personal operate in full duplex
mode.
In the networking world, network adapters are capable of transmitting
and receiving data simultaneously in a switched environment. In a shared
environment, such as that where a hub is utilized, the ability is
disabled primarily to minimize collisions.
Marco Ciampa wrote:
>
> On lun, 15 nov 1999, Pastor Torrente, Guillermo wrote:
> >What does exactly mean full duplex and half duplex?
> >
> >TIA
> When you talk at the phone it is full-duplex
> When you talk by radio it is half duplex
> --
> Marco Ciampa
>
> c:\winnt> secure_nt.exe
> Securing NT. Insert Linux boot disk to continue......
--
John J. LeMay Jr.
NJMC, LLC.
http://www.njmc.com
