<s>
M-Bus	B-Architecture
or	O
Meter-Bus	B-Architecture
is	O
a	O
European	O
standard	O
(	O
EN	O
13757-2	O
physical	B-Application
and	O
link	O
layer	O
,	O
EN	O
13757-3	O
application	B-Application
layer	I-Application
)	O
for	O
the	O
remote	O
reading	O
of	O
water	O
,	O
gas	O
or	O
electricity	O
meters	O
.	O
</s>
<s>
M-Bus	B-Architecture
is	O
also	O
usable	O
for	O
other	O
types	O
of	O
consumption	O
meters	O
,	O
such	O
as	O
heating	O
systems	O
or	O
water	O
meters	O
.	O
</s>
<s>
The	O
M-Bus	B-Architecture
interface	O
is	O
made	O
for	O
communication	O
on	O
two	O
wires	O
,	O
making	O
it	O
cost-effective	O
.	O
</s>
<s>
A	O
radio	O
variant	O
of	O
M-Bus	B-Architecture
Wireless	B-Architecture
M-Bus	I-Architecture
is	O
also	O
specified	O
in	O
EN	B-Architecture
13757	I-Architecture
–	O
4	O
.	O
</s>
<s>
The	O
M-Bus	B-Architecture
was	O
developed	O
to	O
fill	O
the	O
need	O
for	O
a	O
system	O
for	O
the	O
networking	O
and	O
remote	O
reading	O
of	O
utility	O
meters	O
,	O
for	O
example	O
to	O
measure	O
the	O
consumption	O
of	O
gas	O
or	O
water	O
in	O
the	O
home	O
.	O
</s>
<s>
An	O
alternative	O
method	O
of	O
collecting	O
data	O
centrally	O
is	O
to	O
transmit	O
meter	O
readings	O
via	O
a	O
modem	B-Application
.	O
</s>
<s>
Other	O
applications	O
for	O
the	O
M-Bus	B-Architecture
such	O
as	O
alarm	O
systems	O
,	O
flexible	O
illumination	O
installations	O
,	O
heating	O
control	O
,	O
etc	O
.	O
</s>
<s>
Since	O
no	O
bus	O
system	O
was	O
available	O
for	O
the	O
requirements	O
of	O
meter	O
reading	O
,	O
the	O
M-Bus	B-Architecture
was	O
developed	O
by	O
Horst	O
Ziegler	O
of	O
the	O
University	O
of	O
Paderborn	O
in	O
cooperation	O
with	O
Texas	O
Instruments	O
Deutschland	O
GmbH	O
and	O
.	O
</s>
<s>
Since	O
the	O
M-Bus	B-Architecture
is	O
not	O
a	O
network	B-Application
,	O
and	O
therefore	O
does	O
not	O
-	O
among	O
other	O
things	O
-	O
need	O
a	O
transport	B-Architecture
or	O
session	B-Application
layer	I-Application
,	O
the	O
levels	O
four	O
to	O
six	O
of	O
the	O
OSI	O
model	O
are	O
empty	O
.	O
</s>
<s>
Therefore	O
,	O
only	O
the	O
physical	B-Application
,	O
the	O
data	B-Protocol
link	I-Protocol
,	O
the	O
network	B-Application
and	O
the	O
application	B-Application
layer	I-Application
are	O
provided	O
with	O
functions	O
.	O
</s>
<s>
M-Bus	B-Architecture
connection	O
is	O
called	O
P1	O
,	O
M-Bus	B-Architecture
or	O
HAN	O
(	O
Home	O
Area	O
Network	B-Application
)	O
consumer	O
connection	O
.	O
</s>
<s>
M-Bus	B-Architecture
uses	O
two-wire	O
telephone	O
cable	O
with	O
maximum	O
length	O
of	O
350	O
meters	O
when	O
using	O
nominal	O
transfer	O
speeds	O
300	O
and	O
9600	O
baud	O
.	O
</s>
<s>
There	O
is	O
no	O
standardized	O
connector	O
,	O
but	O
RJ11	O
and	O
RJ12	O
Modular	B-Architecture
connectors	I-Architecture
are	O
used	O
by	O
meter	O
manufacturers	O
.	O
</s>
