<s>
The	O
Cisco	O
Extension	B-Protocol
Mobility	I-Protocol
feature	O
,	O
sometimes	O
referred	O
to	O
as	O
hoteling	O
,	O
allows	O
a	O
user	O
to	O
temporarily	O
configure	O
another	O
IP	B-Device
telephone	I-Device
as	O
their	O
own	O
.	O
</s>
<s>
The	O
user	O
must	O
log	O
into	O
that	O
IP	B-Device
telephone	I-Device
with	O
a	O
username	O
and	O
PIN	O
.	O
</s>
<s>
Extension	B-Protocol
mobility	I-Protocol
is	O
often	O
by	O
people	O
who	O
frequently	O
travel	O
between	O
different	O
company	O
locations	O
.	O
</s>
<s>
They	O
can	O
use	O
any	O
fixed-line	B-Application
phone	I-Application
in	O
the	O
company	O
as	O
if	O
it	O
is	O
their	O
own	O
telephone	O
by	O
logging	O
in	O
.	O
</s>
<s>
Extension	B-Protocol
Mobility	I-Protocol
is	O
also	O
useful	O
in	O
situations	O
where	O
people	O
do	O
n’t	O
have	O
a	O
dedicated	O
desk	O
of	O
their	O
own	O
.	O
</s>
<s>
There	O
are	O
a	O
few	O
issues	O
with	O
the	O
use	O
of	O
extension	B-Protocol
mobility	I-Protocol
.	O
</s>
<s>
One	O
must	O
to	O
log	O
into	O
the	O
telephone	O
via	O
the	O
telephone	O
keypad	B-Device
.	O
</s>
<s>
However	O
,	O
in	O
organizations	O
that	O
use	O
services	O
such	O
as	O
Active	B-Protocol
Directory	I-Protocol
(	O
where	O
the	O
username	O
is	O
shared	O
across	O
multiple	O
applications	O
)	O
,	O
the	O
user	O
must	O
enter	O
their	O
email	O
address	O
via	O
the	O
telephone	O
keypad	B-Device
.	O
</s>
<s>
Using	O
this	O
client	B-Protocol
software	I-Protocol
,	O
the	O
login	O
procedure	O
for	O
the	O
telephone	O
is	O
synchronized	O
with	O
the	O
login	O
of	O
a	O
user	O
's	O
laptop	O
or	O
PC	O
.	O
</s>
