<s>
Token	B-Protocol
bus	I-Protocol
is	O
a	O
network	O
implementing	O
a	O
Token	B-Device
Ring	I-Device
protocol	O
over	O
a	O
virtual	O
ring	O
on	O
a	O
coaxial	O
cable	O
.	O
</s>
<s>
The	O
Token	B-Protocol
bus	I-Protocol
protocol	O
was	O
created	O
to	O
combine	O
the	O
benefits	O
of	O
a	O
physical	O
bus	O
network	O
with	O
the	O
deterministic	O
access	O
protocol	O
of	O
a	O
Token	B-Device
Ring	I-Device
network	I-Device
.	O
</s>
<s>
Token	B-Protocol
bus	I-Protocol
was	O
standardized	O
by	O
IEEE	O
standard	O
802.4	B-Protocol
.	O
</s>
<s>
Token	B-Protocol
bus	I-Protocol
was	O
used	O
by	O
General	O
Motors	O
for	O
their	O
Manufacturing	B-General_Concept
Automation	I-General_Concept
Protocol	I-General_Concept
(	O
MAP	O
)	O
standardization	O
effort	O
.	O
</s>
<s>
This	O
is	O
an	O
application	O
of	O
the	O
concepts	O
used	O
in	O
Token	B-Device
Ring	I-Device
networks	I-Device
.	O
</s>
<s>
In	O
order	O
to	O
guarantee	O
the	O
packet	O
delay	O
and	O
transmission	O
in	O
Token	B-Protocol
bus	I-Protocol
protocol	O
,	O
a	O
modified	O
Token	B-Protocol
bus	I-Protocol
was	O
proposed	O
in	O
Manufacturing	O
Automation	O
Systems	O
and	O
flexible	O
manufacturing	O
system	O
(	O
FMS	O
)	O
.	O
</s>
<s>
A	O
means	O
for	O
carrying	O
Internet	B-Protocol
Protocol	I-Protocol
over	O
IEEE	O
802	O
networks	O
,	O
including	O
token	B-Protocol
bus	I-Protocol
networks	I-Protocol
,	O
was	O
developed	O
.	O
</s>
<s>
The	O
IEEE	B-Protocol
802.4	I-Protocol
Working	O
Group	O
has	O
disbanded	O
and	O
the	O
standard	O
has	O
been	O
withdrawn	O
by	O
the	O
IEEE	O
.	O
</s>
