<s>
H.331	B-Protocol
is	O
part	O
of	O
the	O
ITU	O
suite	O
of	O
standards	O
for	O
Video	B-Application
Teleconferencing	I-Application
.	O
</s>
<s>
This	O
standard	O
is	O
used	O
for	O
broadcast	O
of	O
videoconferences	B-Application
,	O
as	O
opposed	O
to	O
point-to-point	O
links	O
.	O
</s>
<s>
A	O
standard	O
H.320	B-Application
terminal	O
(	O
i.e.	O
</s>
<s>
H.331	B-Protocol
specifies	O
how	O
H.320	B-Application
terminals	O
act	O
in	O
situations	O
where	O
there	O
is	O
no	O
data	O
path	O
from	O
receivers	O
back	O
to	O
transmitters	O
,	O
making	O
normal	O
two-way	O
negotiation	O
impossible	O
.	O
</s>
<s>
Often	O
low-bit-rate	O
digital	O
satellite	O
transmission	O
is	O
used	O
for	O
such	O
services	O
,	O
with	O
one	O
uplink	O
site	O
sending	O
H.320	B-Application
video	O
and	O
many	O
receiving	O
stations	O
.	O
</s>
