<s>
CommuniGate	B-Protocol
Pro	I-Protocol
(	O
CGatePro	O
)	O
is	O
a	O
highly	O
scalable	O
carrier	O
grade	O
unified	O
communications	O
server	O
,	O
as	O
well	O
as	O
a	O
development	O
platform	O
.	O
</s>
<s>
APIs	B-Application
are	O
available	O
for	O
authentication	O
,	O
helper	O
applications	O
and	O
directory	O
services	O
.	O
</s>
<s>
CommuniGate	B-Protocol
Pro	I-Protocol
provides	O
web	O
interface	O
(	O
with	O
context-insensitive	O
online	B-Protocol
help	I-Protocol
facilities	O
)	O
for	O
configuration	O
of	O
its	O
services	O
.	O
</s>
<s>
Since	O
version	O
5	O
custom	O
procedural	O
CG/PL	O
scripting	B-Language
language	I-Language
is	O
provided	O
for	O
performing	O
advanced	O
configuration	O
tasks	O
,	O
including	O
modification	O
of	O
or	O
integration	O
with	O
software	O
's	O
modules	O
.	O
</s>
<s>
Perl	B-Language
,	O
Java	B-Language
and	O
command	O
line	O
interface-based	O
application	B-Application
programming	I-Application
interfaces	I-Application
are	O
also	O
available	O
.	O
</s>
<s>
CommuniGate	B-Protocol
Pro	I-Protocol
integrates	O
with	O
Microsoft	B-Application
Outlook	I-Application
via	O
bundled	O
Messaging	B-Protocol
Application	I-Protocol
Programming	I-Protocol
Interface	I-Protocol
and	O
ActiveSync	B-Operating_System
connectors	O
.	O
</s>
<s>
Support	O
for	O
other	O
personal	B-Application
information	I-Application
managers	I-Application
,	O
including	O
Apple	O
Inc.	O
'	O
s	O
iCal	B-Language
,	O
is	O
also	O
available	O
.	O
</s>
<s>
Communications	O
between	O
connectors	O
and	O
server	O
may	O
be	O
encrypted	O
using	O
Secure	B-Protocol
Sockets	I-Protocol
Layer	I-Protocol
(	O
SSL	O
)	O
or	O
Transport	B-Protocol
Layer	I-Protocol
Security	I-Protocol
(	O
TLS	O
)	O
cryptographic	B-Protocol
protocols	I-Protocol
.	O
</s>
<s>
CommuniGate	B-Protocol
Pro	I-Protocol
includes	O
mail	B-Protocol
transfer	I-Protocol
agent	I-Protocol
(	O
MTA	O
)	O
protocols	O
that	O
support	O
POP3	B-Protocol
,	O
IMAP4	B-Protocol
and	O
SMTP	B-Protocol
(	O
along	O
with	O
their	O
secure	O
variations	O
)	O
,	O
as	O
well	O
as	O
webmail	B-Protocol
interface	O
.	O
</s>
<s>
SpamAssassin	B-Language
for	O
anti-spam	O
protection	O
)	O
.	O
</s>
<s>
Anti-virus	B-Application
protection	O
is	O
available	O
via	O
extra	O
modules	O
,	O
sold	O
separately	O
.	O
</s>
<s>
Since	O
version	O
5	O
CommuniGate	B-Protocol
Pro	I-Protocol
includes	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	O
)	O
server	O
,	O
which	O
provides	O
instant	B-Application
messaging	I-Application
and	O
voice	B-Application
and	O
video	B-Application
conferencing	I-Application
along	O
with	O
custom	O
Windows	O
Messenger-compatible	O
collaboration-oriented	O
extensions	O
for	O
presence	B-Protocol
sharing	I-Protocol
,	O
whiteboarding	B-Protocol
,	O
and	O
screen	B-Protocol
and	O
file	O
sharing	O
.	O
</s>
<s>
Starting	O
with	O
version	O
5.1	O
CommuniGate	B-Protocol
Pro	I-Protocol
includes	O
its	O
own	O
XML	B-Protocol
Interface	I-Protocol
to	I-Protocol
Messaging	I-Protocol
,	I-Protocol
Scheduling	I-Protocol
,	I-Protocol
and	I-Protocol
Signaling	I-Protocol
(	O
XIMSS	B-Protocol
)	O
protocol	O
together	O
with	O
the	O
webmail	B-Protocol
"	O
!	O
"	O
</s>
<s>
client	B-Protocol
for	O
this	O
protocol	O
.	O
</s>
<s>
XIMSS	B-Protocol
offers	O
HTTP	B-Protocol
-	O
and	O
XML-based	O
client	B-Protocol
interface	O
to	O
a	O
complex	O
of	O
communications	O
services	O
provided	O
by	O
one	O
server	O
.	O
</s>
<s>
Although	O
the	O
protocol	O
is	O
not	O
bound	O
to	O
CommuniGate	B-Protocol
Pro	I-Protocol
,	O
its	O
scope	O
is	O
derived	O
from	O
the	O
parent	O
project	O
's	O
functionality	O
;	O
so	O
far	O
no	O
other	O
XIMSS	B-Protocol
servers	O
were	O
announced	O
.	O
</s>
<s>
Since	O
version	O
5.1	O
Extensible	B-Protocol
Messaging	I-Protocol
and	I-Protocol
Presence	I-Protocol
Protocol	I-Protocol
(	O
XMPP	B-Protocol
)	O
is	O
also	O
supported	O
.	O
</s>
<s>
CommuniGate	B-Protocol
Pro	I-Protocol
is	O
available	O
as	O
a	O
free	O
download	O
,	O
although	O
after	O
adding	O
more	O
than	O
five	O
users	O
,	O
it	O
adds	O
a	O
one-line	O
banner	O
to	O
the	O
outbound	O
messages	O
.	O
</s>
<s>
The	O
list	O
of	O
supported	O
platforms	O
include	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
Solaris	B-Application
,	O
AIX	B-Application
,	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Communigate	B-Protocol
Pro	I-Protocol
previously	O
supported	O
a	O
wide	O
variety	O
of	O
additional	O
platforms	O
,	O
including	O
OS/400	B-Application
,	O
OpenVMS	B-Operating_System
,	O
Tru64	B-Operating_System
,	O
HP-UX	B-Application
and	O
UnixWare	B-Operating_System
.	O
</s>
<s>
In	O
their	O
generally	O
positive	O
reviews	O
,	O
Wendy	O
M	O
.	O
Grossman	O
of	O
ZDNet	O
,	O
Aaron	O
Weiss	O
of	O
ServerWatch	O
and	O
Michael	O
Caton	O
of	O
eWeek	O
praised	O
CommuniGate	B-Protocol
Pro	I-Protocol
for	O
its	O
scalability	O
,	O
set	O
of	O
features	O
and	O
high	O
configurability	O
,	O
while	O
criticising	O
it	O
for	O
high	O
price	O
and	O
complexity	O
.	O
</s>
<s>
Aaron	O
Weiss	O
notes	O
:	O
"	O
CommuniGate	B-Protocol
Pro	I-Protocol
is	O
extremely	O
configurable	O
.	O
</s>
