<s>
The	O
Siemens	B-Device
DCO	I-Device
(	O
digital	O
central	O
office	O
)	O
electronic	O
telephone	O
switch	O
was	O
introduced	O
in	O
1977	O
by	O
Stromberg-Carlson	O
,	O
having	O
been	O
conceived	O
by	O
its	O
new	O
president	O
,	O
Leonard	O
A	O
.	O
Muller	O
,	O
an	O
ex	O
IBM	O
senior	O
executive	O
who	O
infused	O
Stromberg	O
with	O
his	O
new	O
digital	O
awareness	O
learned	O
in	O
IBM	O
.	O
</s>
<s>
In	O
a	O
revolutionary	O
project	O
headed	O
by	O
lead	O
engineer	O
and	O
chief	O
of	O
project	O
development	O
,	O
Mick	O
Richmond	O
,	O
the	O
Stromberg-Carlson	O
DCO	O
was	O
the	O
one	O
of	O
the	O
first	O
digital	O
class	B-Device
5	I-Device
telephone	I-Device
switches	I-Device
ever	O
installed	O
in	O
the	O
World	O
's	O
telecommunications	O
network	O
,	O
Muller	O
was	O
quick	O
to	O
recognize	O
the	O
value	O
digital	O
technology	O
brought	O
to	O
the	O
science	O
of	O
electronic	O
switching	O
and	O
commenced	O
a	O
major	O
digital	O
development	O
program	O
shortly	O
after	O
taking	O
over	O
management	O
of	O
Stromberg	O
in	O
1974	O
.	O
</s>
<s>
In	O
1990	O
Siemens	O
purchased	O
Stromberg	O
Carlson	O
and	O
moved	O
its	O
EWSD	B-Device
production	O
to	O
the	O
Lake	O
Mary	O
,	O
Florida	O
production	O
facility	O
in	O
1991	O
.	O
</s>
<s>
This	O
also	O
brought	O
an	O
end	O
to	O
DCO	O
production	O
as	O
Siemens-Stromberg	O
Carlson	O
focused	O
on	O
marketing	O
the	O
EWSD	B-Device
.	O
</s>
<s>
In	O
2006	O
the	O
entire	O
Siemens	B-Device
DCO	I-Device
line	O
was	O
sold	O
to	O
Genband	O
,	O
originally	O
a	O
VoIP	O
gateway	O
/	O
softswitch	O
company	O
from	O
Texas	O
,	O
USA	O
.	O
</s>
