<s>
In	O
telecommunication	O
,	O
a	O
time-assignment	B-Protocol
speech	I-Protocol
interpolation	I-Protocol
(	O
TASI	O
)	O
was	O
an	O
analog	O
technique	O
used	O
on	O
certain	O
long	O
transmission	O
links	O
to	O
increase	O
voice-transmission	O
capacity	O
.	O
</s>
<s>
It	O
was	O
one	O
of	O
their	O
first	O
applications	O
requiring	O
electronic	B-Device
switching	I-Device
of	O
voice	O
circuits	O
.	O
</s>
<s>
Later	O
digital	B-Protocol
circuit	I-Protocol
multiplication	I-Protocol
equipment	I-Protocol
included	O
TASI	O
as	O
a	O
feature	O
,	O
not	O
as	O
distinct	O
hardware	O
.	O
</s>
<s>
The	O
speech	O
detector	O
function	O
is	O
called	O
voice	B-General_Concept
activity	I-General_Concept
detection	I-General_Concept
.	O
</s>
