<s>
Rolanet	B-Protocol
(	O
Robotron	O
Local	O
Area	O
Network	O
)	O
was	O
a	O
networking	O
standard	O
,	O
developed	O
in	O
the	O
former	O
German	O
Democratic	O
Republic	O
(	O
GDR	O
)	O
and	O
introduced	O
in	O
1987	O
by	O
the	O
computer	O
manufacturer	O
Robotron	O
.	O
</s>
<s>
It	O
enabled	O
computer	B-Architecture
networking	I-Architecture
over	O
coax	O
cable	O
and	O
glass	O
fiber	O
with	O
a	O
range	O
of	O
.	O
</s>
<s>
A	O
maximum	O
of	O
253	O
computers	O
could	O
be	O
connected	O
using	O
Rolanet	B-Protocol
.	O
</s>
<s>
Two	O
variants	O
of	O
Rolanet	B-Protocol
existed	O
:	O
</s>
<s>
Rolanet	B-Protocol
1	O
,	O
introduced	O
in	O
1987	O
,	O
saw	O
limited	O
deployment	O
;	O
</s>
<s>
Rolanet	B-Protocol
2	O
was	O
planned	O
as	O
a	O
successor	O
to	O
Rolanet	B-Protocol
1	O
,	O
but	O
presumably	O
never	O
got	O
beyond	O
the	O
prototype	O
stage	O
.	O
</s>
<s>
A	O
scaled-down	O
version	O
of	O
Rolanet	B-Protocol
,	O
BICNet	O
,	O
was	O
used	O
for	O
educational	O
purposes	O
.	O
</s>
<s>
It	O
is	O
no	O
longer	O
possible	O
to	O
assemble	O
a	O
functioning	O
Rolanet	B-Protocol
system	O
today	O
,	O
due	O
to	O
lack	O
of	O
software	O
and	O
working	O
hardware	O
.	O
</s>
