<s>
Synchronous	B-Protocol
serial	I-Protocol
communication	I-Protocol
describes	O
a	O
serial	B-Protocol
communication	I-Protocol
protocol	O
in	O
which	O
"	O
data	O
is	O
sent	O
in	O
a	O
continuous	O
stream	O
at	O
constant	O
rate.	O
"	O
</s>
<s>
Synchronous	B-Protocol
communication	I-Protocol
requires	O
that	O
the	O
clocks	O
in	O
the	O
transmitting	O
and	O
receiving	O
devices	O
are	O
synchronized	O
running	O
at	O
the	O
same	O
rate	O
so	O
the	O
receiver	O
can	O
sample	O
the	O
signal	O
at	O
the	O
same	O
time	O
intervals	O
used	O
by	O
the	O
transmitter	O
.	O
</s>
<s>
For	O
this	O
reason	O
"	O
synchronous	B-Protocol
communication	I-Protocol
permits	O
more	O
information	O
to	O
be	O
passed	O
over	O
a	O
circuit	O
per	O
unit	O
time	O
"	O
than	O
asynchronous	O
serial	B-Protocol
communication	I-Protocol
.	O
</s>
<s>
The	O
IBM	O
Binary	B-Protocol
Synchronous	I-Protocol
protocol	I-Protocol
(	O
Bisync	B-Protocol
)	O
is	O
still	O
in	O
use	O
,	O
Other	O
examples	O
of	O
byte-oriented	O
protocols	O
are	O
IBM	O
's	O
Synchronous	B-Protocol
transmit-receive	I-Protocol
(	O
STR	O
)	O
,	O
and	O
Digital	B-Protocol
Data	I-Protocol
Communications	I-Protocol
Message	I-Protocol
Protocol	I-Protocol
(	O
DDCMP	B-Protocol
)	O
from	O
Digital	O
Equipment	O
Corporation	O
.	O
</s>
<s>
Synchronous	B-Protocol
Data	I-Protocol
Link	I-Protocol
Control	I-Protocol
(	O
SDLC	O
)	O
specifies	O
that	O
a	O
station	O
continue	O
transmitting	O
a	O
sequence	O
of	O
'	O
1	O
 '	O
bits	O
on	O
an	O
idle	O
line	O
.	O
</s>
<s>
Other	O
examples	O
of	O
bit-oriented	O
protocols	O
are	O
Logical	O
Link	O
Control	O
(	O
LLC	O
)	O
IEEE	O
802.2	O
,	O
and	O
ANSI	O
Advanced	B-Protocol
Data	I-Protocol
Communication	I-Protocol
Control	I-Protocol
Procedures	I-Protocol
(	O
ADCCP	B-Protocol
)	O
.	O
</s>
