12.
In a neutral half-duplex teletypewriter circuit, if you are receiving a message and you want to signal the distant
end to stop sending, you must:
a.
press the BREAK key.
b.
turn your teletypewriter machine off.
c.
type on your machine and tell him to stop sending.
d.
wait until he stops sending, as there is no way to signal him.
13.
A teletypewriter circuit that you can use to send messages whether from west to east or from east to west, but not
in both directions at the same time, is a:
a.
simplex circuit.
c.
full-duplex circuit.
b.
half-duplex circuit.
d.
one-way-only circuit.
14.
Assume that you are using a teletypewriter order wire, and you are able to transmit and receive at the same time
but do not get a home copy of your transmission. What type of teletypewriter circuit is used for your order wire?
a.
Simplex.
c.
Full-duplex.
b.
Half-duplex.
d.
One-way-only.
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