<s>
Sipdroid	B-Application
is	O
a	O
voice	B-Application
over	I-Application
IP	I-Application
mobile	B-Application
app	I-Application
for	O
the	O
Android	B-Application
operating	I-Application
system	I-Application
using	O
the	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
.	O
</s>
<s>
Sipdroid	B-Application
is	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
software	I-Application
released	O
under	O
the	O
GPL-3.0-or-later	B-License
license	O
.	O
</s>
<s>
The	O
sipdroid	B-Application
open	O
source	O
project	O
was	O
started	O
in	O
svn	O
on	O
March	O
12	O
,	O
2009	O
by	O
the	O
project	O
author	O
pmerle71	O
.	O
</s>
<s>
Since	O
this	O
time	O
,	O
sipdroid	B-Application
has	O
been	O
used	O
with	O
many	O
different	O
native	O
SIP	O
deployments	O
and	O
is	O
given	O
as	O
the	O
default	O
android	B-Application
SIP	O
client	O
by	O
some	O
vendors	O
.	O
</s>
<s>
Lumicall	B-Application
is	O
a	O
fork	B-Application
of	O
Sipdroid	B-Application
by	O
Daniel	O
Pocock	O
that	O
has	O
undergone	O
significant	O
extensions	O
,	O
adding	O
support	O
for	O
encryption	O
(	O
Transport	B-Protocol
Layer	I-Protocol
Security	I-Protocol
,	O
SRTP	B-Protocol
,	O
ZRTP	B-Protocol
)	O
,	O
Push-to-talk	O
,	O
ENUM	B-Language
dialing	O
and	O
other	O
enhancements	O
.	O
</s>
<s>
First	O
released	O
on	O
5	O
February	O
2012	O
,	O
Lumicall	B-Application
is	O
distributed	O
via	O
Google	O
Play	O
and	O
F-droid	B-Application
.	O
</s>
<s>
In	O
2012	O
,	O
Lumicall	B-Application
's	O
real-time	O
monitoring	O
service	O
,	O
based	O
on	O
gmetric4j	O
,	O
was	O
featured	O
in	O
the	O
book	O
Monitoring	O
with	O
Ganglia	O
.	O
</s>
<s>
Lumicall	B-Application
was	O
featured	O
in	O
the	O
main	O
track	O
at	O
FOSDEM	O
2013	O
during	O
the	O
event	O
Free	O
,	O
Open	O
,	O
Secure	O
and	O
Convenient	O
Communications	O
where	O
the	O
lead	O
developer	O
,	O
Daniel	O
Pocock	O
,	O
was	O
part	O
of	O
a	O
panel	O
discussion	O
on	O
this	O
pressing	O
topic	O
for	O
the	O
free	B-Application
software	I-Application
community	O
.	O
</s>
<s>
Lumicall	B-Application
supports	O
Interactive	O
Connectivity	O
Establishment	O
,	O
the	O
IETF	O
proposed	O
successor	O
to	O
STUN	B-Protocol
for	O
users	O
behind	O
NAT	O
.	O
</s>
<s>
Lumicall	B-Application
interfaces	O
with	O
Android	B-Application
's	O
default	O
dialer	O
application	O
and	O
optionally	O
prompts	O
the	O
user	O
to	O
make	O
an	O
outgoing	O
call	O
using	O
VoIP	B-Application
or	O
the	O
GSM/3G	O
network	O
.	O
</s>
<s>
Sipdroid	B-Application
interfaces	O
with	O
Android	B-Application
's	O
default	O
dialer	O
application	O
and	O
optionally	O
prompts	O
the	O
user	O
to	O
make	O
an	O
outgoing	O
call	O
using	O
Sipdroid	B-Application
or	O
the	O
GSM/3G	O
network	O
.	O
</s>
