<s>
An	O
Ethernet	B-Protocol
train	I-Protocol
backbone	I-Protocol
(	O
ETB	O
)	O
is	O
a	O
train	O
communication	O
network	O
based	O
on	O
Ethernet	O
technology	O
standardised	O
with	O
IEC-61375-2-5	O
.	O
</s>
<s>
This	O
is	O
a	O
train-wide	O
communication	O
backbone	B-General_Concept
such	O
as	O
Wire	O
Train	O
Bus	O
(	O
WTB	O
)	O
.	O
</s>
