<s>
PhoneNET	B-Protocol
was	O
an	O
implementation	O
of	O
the	O
AppleTalk	B-Application
networking	B-Architecture
physical	O
layer	O
created	O
by	O
Farallon	O
Computing	O
(	O
now	O
Netopia	O
)	O
.	O
</s>
<s>
Instead	O
of	O
the	O
shielded	O
twisted	O
pair	O
wiring	O
and	O
three-pin	O
Mini-DIN	B-Protocol
connectors	I-Protocol
employed	O
by	O
Apple	O
's	O
LocalTalk	B-Device
implementation	O
,	O
PhoneNET	B-Protocol
uses	O
standard	O
four-conductor	O
telephone	O
(	O
Category	O
1	O
)	O
patch	O
cords	O
and	O
RJ-11	O
modular	B-Architecture
connectors	I-Architecture
.	O
</s>
<s>
Like	O
LocalTalk	B-Device
,	O
the	O
maximum	O
speed	O
for	O
data	O
transfer	O
was	O
230	O
kbit/s	O
unless	O
accelerating	O
drivers	O
were	O
used	O
to	O
override	O
the	O
operating	O
system	O
's	O
drivers	O
.	O
</s>
<s>
Unlike	O
LocalTalk	B-Device
,	O
which	O
only	O
supported	O
a	O
daisy	O
chain	O
topology	O
,	O
PhoneNET	B-Protocol
was	O
principally	O
used	O
in	O
star	O
topologies	O
over	O
structured	O
cabling	O
plants	O
.	O
</s>
<s>
Unlike	O
LocalTalk	B-Device
's	O
four-wire	O
grounded	O
implementation	O
,	O
PhoneNET	B-Protocol
used	O
a	O
single	O
twisted	O
pair	O
,	O
or	O
the	O
outside	O
two	O
wires	O
of	O
a	O
four-conductor	O
flat	O
cable	O
.	O
</s>
<s>
As	O
normal	O
telephone	O
equipment	O
used	O
the	O
inside	O
two	O
wires	O
,	O
PhoneNET	B-Protocol
could	O
share	O
cabling	O
with	O
telephones	O
,	O
allowing	O
both	O
phone	O
calls	O
and	O
networking	B-Architecture
over	O
a	O
single	O
cable	O
.	O
</s>
<s>
Though	O
PhoneNET	B-Protocol
transceivers	O
are	O
still	O
available	O
from	O
third	O
parties	O
for	O
use	O
on	O
legacy	O
Macintosh	B-Device
networks	O
,	O
no	O
current	O
Apple	O
computer	O
or	O
device	O
have	O
the	O
RS-422	O
mini-DIN-8	O
serial	O
ports	O
that	O
are	O
required	O
for	O
LocalTalk	B-Device
networking	B-Architecture
.	O
</s>
<s>
Modern	O
Apple	O
devices	O
use	O
Ethernet	O
or	O
wireless	O
networking	B-Architecture
.	O
</s>
