<s>
The	O
Cisco	B-Device
Catalyst	I-Device
1900	I-Device
is	O
a	O
19	O
"	O
rack	O
mountable	O
,	O
managed	O
(	O
configurable	O
)	O
10BASE-T	B-Protocol
Ethernet	O
switch	O
with	O
100BASE-TX/100BASE	O
-FX	O
uplink	O
ports	O
.	O
</s>
<s>
The	O
switch	O
was	O
available	O
in	O
12-port	O
and	O
24-port	O
models	O
with	O
either	O
two	O
100BASE-TX	B-Protocol
uplink	O
ports	O
or	O
one	O
fibre	O
and	O
one	O
copper	O
100	O
Mbit/s	O
uplink	O
ports	O
.	O
</s>
<s>
In	O
addition	O
to	O
this	O
,	O
one	O
AUI	B-Protocol
port	I-Protocol
was	O
available	O
on	O
the	O
rear	O
panel	O
for	O
connecting	O
to	O
fiber	O
or	O
legacy	O
10Base2	O
or	O
10Base5	O
networks	O
.	O
</s>
<s>
Whilst	O
the	O
enterprise	O
edition	O
's	O
Command	B-Application
Line	I-Application
Interface	I-Application
(	O
CLI	O
)	O
had	O
a	O
strong	O
similarity	O
to	O
IOS	B-Protocol
,	O
the	O
switches	O
ran	O
a	O
unique	O
software	O
which	O
was	O
neither	O
IOS	B-Protocol
or	O
CatOS	B-Operating_System
.	O
</s>
