<s>
In	O
telephony	O
,	O
a	O
stimulus	B-Protocol
protocol	I-Protocol
is	O
a	O
type	O
of	O
protocol	O
that	O
is	O
used	O
to	O
carry	O
event	O
notifications	O
between	O
end	O
points	O
.	O
</s>
<s>
However	O
a	O
stimulus	B-Protocol
protocol	I-Protocol
is	O
not	O
sensitive	O
to	O
the	O
system	O
state	O
.	O
</s>
<s>
Stimulus	B-Protocol
protocols	I-Protocol
are	O
most	O
suited	O
to	O
networks	O
with	O
dumb	O
peripherals	O
and	O
intelligent	O
centralized	O
applications	O
(	O
see	O
intelligent	O
network	O
)	O
.	O
</s>
<s>
With	O
their	O
suitability	O
tied	O
to	O
the	O
virtues	O
of	O
centralized	O
network	O
architectures	O
,	O
stimulus	B-Protocol
protocols	I-Protocol
are	O
being	O
deprecated	O
in	O
favor	O
of	O
functional	O
protocols	O
with	O
the	O
rise	O
of	O
the	O
Internet	O
.	O
</s>
<s>
A	O
functional	O
protocol	O
such	O
as	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	O
)	O
from	O
the	O
IETF	O
is	O
more	O
suited	O
for	O
Internet	O
applications	O
.	O
</s>
