<s>
ipTTY	B-Protocol
is	O
a	O
SIP	O
soft	O
phone	O
that	O
supports	O
the	O
conversion	O
of	O
Baudot	O
Tones	O
sent	O
via	O
IP	O
to	O
text	O
.	O
</s>
<s>
In	O
other	O
words	O
,	O
ipTTY	B-Protocol
facilitates	O
a	O
TTY/TDD	O
conversation	O
over	O
IP	O
without	O
the	O
need	O
for	O
modems	O
or	O
analog	O
lines	O
.	O
</s>
<s>
ipTTY	B-Protocol
connects	O
directly	O
via	O
IP	O
to	O
PBX	B-Device
and	O
VoIP	B-Application
systems	O
that	O
support	O
SIP	O
.	O
</s>
<s>
ipTTY	B-Protocol
,	O
provided	O
the	O
PBX/VoIP	O
system	O
supports	O
SIP	O
,	O
makes	O
this	O
requirement	O
readily	O
achievable	O
.	O
</s>
<s>
ipTTY	B-Protocol
also	O
supports	O
RFC	O
4103	O
or	O
what	O
some	O
commonly	O
refer	O
to	O
as	O
Text	O
over	O
IP	O
.	O
</s>
