<s>
Generic	B-Protocol
Framing	I-Protocol
Procedure	I-Protocol
(	O
GFP	O
)	O
is	O
a	O
multiplexing	B-Architecture
technique	O
defined	O
by	O
ITU-T	O
G.7041	B-Protocol
.	O
</s>
<s>
This	O
allows	O
mapping	O
of	O
variable	O
length	O
,	O
higher-layer	O
client	O
signals	O
over	O
a	O
circuit	O
switched	O
transport	O
network	O
like	O
OTN	B-Protocol
,	O
SDH/SONET	B-Protocol
or	O
PDH	B-Protocol
.	O
</s>
<s>
The	O
client	O
signals	O
can	O
be	O
protocol	B-Protocol
data	I-Protocol
unit	I-Protocol
(	O
PDU	O
)	O
oriented	O
(	O
like	O
IP/PPP	O
or	O
Ethernet	O
Media	B-Protocol
Access	I-Protocol
Control	I-Protocol
)	O
or	O
can	O
be	O
block-code	O
oriented	O
(	O
like	O
Fibre	B-Architecture
Channel	I-Architecture
)	O
.	O
</s>
<s>
There	O
are	O
two	O
modes	O
of	O
GFP	O
:	O
Generic	B-Protocol
Framing	I-Protocol
Procedure	I-Protocol
-	O
Framed	O
(	O
GFP-F	O
)	O
and	O
Generic	B-Protocol
Framing	I-Protocol
Procedure	I-Protocol
-	O
Transparent	O
(	O
GFP-T	O
)	O
:	O
</s>
<s>
GFP-T	O
,	O
on	O
the	O
other	O
hand	O
,	O
allows	O
mapping	O
of	O
multiple	O
8B/10B	B-Protocol
block-coded	O
client	O
data	O
streams	O
into	O
an	O
efficient	O
64B/65B	O
block	O
code	O
for	O
transport	O
within	O
a	O
GFP	O
frame	O
.	O
</s>
<s>
an	O
optional	O
payload	O
frame	B-Protocol
check	I-Protocol
sequence	I-Protocol
(	O
FCS	O
)	O
.	O
</s>
<s>
Transparent	O
GFP	O
(	O
GFP-T	O
)	O
is	O
used	O
for	O
low	O
latency	O
transport	O
of	O
block-coded	O
client	O
signals	O
such	O
as	O
Gigabit	O
Ethernet	O
,	O
Fibre	B-Architecture
Channel	I-Architecture
,	O
ESCON	B-Device
,	O
FiCON	B-Architecture
,	O
and	O
Digital	B-Application
Video	I-Application
Broadcast	I-Application
(	O
DVB	B-Application
)	O
.	O
</s>
<s>
In	O
this	O
mode	O
,	O
small	O
groups	O
of	O
8B/10B	B-Protocol
symbols	O
are	O
transmitted	O
rather	O
than	O
waiting	O
for	O
a	O
complete	O
frame	O
of	O
data	O
.	O
</s>
