<s>
The	O
Public	B-General_Concept
Services	I-General_Concept
Network	I-General_Concept
(	O
PSN	O
)	O
is	O
a	O
UK	O
government	O
's	O
high-performance	O
network	O
,	O
which	O
helps	O
public	O
sector	O
organisations	O
work	O
together	O
,	O
reduce	O
duplication	O
and	O
share	O
resources	O
.	O
</s>
<s>
The	O
Public	B-General_Concept
Services	I-General_Concept
Network	I-General_Concept
(	O
PSN	O
)	O
was	O
launched	O
officially	O
as	O
part	O
of	O
the	O
Transformational	O
Government	O
Strategy	O
commencing	O
in	O
2005	O
,	O
under	O
the	O
original	O
name	O
of	O
the	O
Public	B-General_Concept
Sector	I-General_Concept
Network	I-General_Concept
.	O
</s>
<s>
The	O
Hampshire	O
Public	B-General_Concept
Services	I-General_Concept
Network	I-General_Concept
(	O
HPSN	O
)	O
was	O
the	O
first	O
PSN	O
,	O
launched	O
in	O
1999	O
,	O
followed	O
closely	O
by	O
Kent	O
County	O
Councils	O
partnerships	O
with	O
the	O
KPSN	O
.	O
</s>
<s>
The	O
original	O
concept	O
of	O
a	O
network	O
of	O
networks	O
strategy	O
was	O
based	O
upon	O
the	O
work	O
already	O
undertaken	O
in	O
local	O
government	O
and	O
recognition	O
of	O
Communities	O
of	O
Interest	O
(	O
COI	O
)	O
within	O
the	O
Criminal	O
Justice	O
Sector	O
during	O
work	O
by	O
the	O
Office	O
for	O
Criminal	O
Justice	O
Reform	O
(	O
OCJR	O
)	O
between	O
2005	O
and	O
2007	O
to	O
enable	O
data	B-Application
sharing	I-Application
across	O
business	O
units	O
.	O
</s>
<s>
Within	O
a	O
COI	O
,	O
trust	O
relationships	O
and	O
data	O
interchange	O
are	O
readily	O
supported	O
,	O
enabling	O
data	B-Application
sharing	I-Application
without	O
a	O
need	O
to	O
cross	O
network	O
boundaries	O
and	O
providing	O
benefits	O
of	O
scale	O
without	O
the	O
challenges	O
and	O
compromises	O
intrinsic	O
to	O
homogeneous	O
cross	O
sector	O
networks	O
.	O
</s>
<s>
The	O
GCN	O
network	O
is	O
entirely	O
based	O
on	O
IPv4	B-Protocol
and	O
MPLS	B-Protocol
and	O
the	O
GCNSPs	O
are	O
not	O
currently	O
mandated	O
to	O
provide	O
IPv6	B-Protocol
,	O
though	O
they	O
should	O
have	O
a	O
roadmap	O
to	O
implementing	O
it	O
if	O
and	O
when	O
required	O
.	O
</s>
<s>
BT	O
,	O
Cable	O
&	O
Wireless	O
and	O
Global	O
Crossing	O
signed	O
Deeds	O
of	O
Undertaking	O
(	O
DoU	O
)	O
and	O
subsequently	O
achieved	O
accreditation	O
for	O
providing	O
GCN	O
and	O
IP	B-Application
VPN	I-Application
services	O
.	O
</s>
<s>
In	O
June	O
2012	O
,	O
29	O
companies	O
were	O
confirmed	O
as	O
suppliers	O
of	O
ICT	B-General_Concept
services	O
to	O
the	O
UK	O
public	O
sector	O
under	O
the	O
Government	O
's	O
PSN	O
Services	O
framework	O
contract	O
.	O
</s>
<s>
There	O
were	O
already	O
notable	O
initiatives	O
in	O
progress	O
in	O
county	O
council	O
areas	O
,	O
demonstrating	O
public	B-General_Concept
sector	I-General_Concept
network	I-General_Concept
integration	O
in	O
both	O
the	O
Hampshire	O
HPSN2	O
network	O
and	O
in	O
Kent	O
's	O
community	O
network	O
.	O
</s>
<s>
Centrally	O
procured	O
public	B-General_Concept
sector	I-General_Concept
networks	I-General_Concept
are	O
expected	O
to	O
migrate	O
across	O
to	O
the	O
PSN	O
framework	O
as	O
they	O
reach	O
the	O
end	O
of	O
their	O
contract	O
terms	O
,	O
either	O
through	O
an	O
interim	O
framework	O
or	O
directly	O
.	O
</s>
<s>
The	O
Government	B-General_Concept
Secure	I-General_Concept
Intranet	I-General_Concept
(	O
GSi	O
)	O
contracts	O
expired	O
in	O
September	O
2011	O
,	O
running	O
on	O
to	O
12	O
February	O
2012	O
and	O
were	O
replaced	O
by	O
the	O
transitional	O
Government	B-General_Concept
Secure	I-General_Concept
Intranet	I-General_Concept
Convergence	O
Framework	O
(	O
GCF	O
)	O
.	O
</s>
