<s>
The	O
AXE	B-Device
telephone	I-Device
exchange	I-Device
is	O
a	O
product	O
line	O
of	O
circuit	B-Protocol
switched	I-Protocol
digital	O
telephone	O
exchanges	O
manufactured	O
by	O
Ericsson	O
,	O
a	O
Swedish	O
telecom	O
company	O
.	O
</s>
<s>
It	O
is	O
used	O
for	O
connecting	O
local	O
landlines	B-Application
,	O
operating	O
mobile	O
networks	O
(	O
TDMA	O
,	O
GSM	O
,	O
CDMA	B-Protocol
,	O
W-CDMA	O
,	O
PDC	O
)	O
,	O
international	O
telephony	O
traffic	O
and	O
signaling	O
.	O
</s>
<s>
It	O
runs	O
in	O
parallel	B-General_Concept
sync	I-General_Concept
mode	I-General_Concept
making	O
it	O
fault	O
redundant	O
.	O
</s>
<s>
The	O
parallel	B-General_Concept
sync	I-General_Concept
mode	I-General_Concept
was	O
partly	O
abandoned	O
in	O
the	O
APZ	O
212	O
40	O
and	O
subsequent	O
models	O
and	O
has	O
been	O
replaced	O
with	O
a	O
warm	O
standby	O
scheme	O
.	O
</s>
<s>
Ericsson	O
AXE	B-Device
telephone	I-Device
exchanges	I-Device
support	O
lawful	O
intercepts	O
via	O
the	O
remote-control	O
equipment	O
subsystem	O
(	O
RES	O
)	O
,	O
which	O
carries	O
out	O
the	O
tap	O
,	O
and	O
the	O
interception	O
management	O
system	O
(	O
IMS	O
)	O
,	O
software	O
used	O
for	O
initiating	O
the	O
tap	O
,	O
which	O
adds	O
the	O
tap	O
to	O
the	O
RES	O
database	O
.	O
</s>
<s>
Code	O
is	O
written	O
in	O
PLEX	B-Language
(	O
a	O
proprietary	O
programming	O
language	O
tied	O
to	O
the	O
AXE	O
hardware	O
,	O
designed	O
by	O
Göran	O
Hemdahl	O
)	O
,	O
SDL	B-Application
and	O
ASA210C	O
programming	O
languages	O
.	O
</s>
