<s>
Voice	O
over	O
Frame	B-Protocol
Relay	I-Protocol
(	O
VoFR	B-Protocol
)	O
is	O
a	O
protocol	O
to	O
transfer	O
voice	O
over	O
Frame	B-Protocol
Relay	I-Protocol
networks	I-Protocol
.	O
</s>
<s>
VoFR	B-Protocol
uses	O
two	O
sub-protocols	O
,	O
FRF.11	O
and	O
FRF.12	O
.	O
</s>
<s>
FRF.11	O
defines	O
the	O
frame	O
format	O
of	O
VoFR	B-Protocol
,	O
and	O
FRF.12	O
is	O
used	O
for	O
packet	O
fragmentation	O
and	O
reassembly	O
.	O
</s>
