<s>
Telecommunications	B-Protocol
cables	I-Protocol
are	O
a	O
type	O
of	O
guided	O
transmission	O
mediums	O
.	O
</s>
<s>
When	O
the	O
distance	O
between	O
the	O
transmitter	O
and	O
receiver	O
is	O
far	O
,	O
or	O
an	O
unguided	O
medium	O
transmission	O
is	O
used	O
,	O
antennas	O
are	O
used	O
;	O
otherwise	O
,	O
telecommunications	B-Protocol
cables	I-Protocol
are	O
used	O
in	O
guided	O
medium	O
transmission	O
.	O
</s>
<s>
There	O
are	O
several	O
types	O
of	O
telecommunications	B-Protocol
cable	I-Protocol
:	O
</s>
<s>
optical	B-Architecture
fibers	I-Architecture
when	O
light	O
signals	O
are	O
transmitted	O
.	O
</s>
