2
24-Hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
CRS2F31xx-100
Installation
CAUTION: Wear a grounding device and observe electrostatic discharge precautions
when setting the switches and jumper. Failure to observe this caution could result in
damage to, and subsequent failure of, the media converter.
Set the DTE/DCE Switch
The DTE/DCE switch is located on the side of the media converter. How the
DTE/DCE switch is set depends on the type of device connected to the media
converter:
•
DTE
(Data Terminal Equipment)
.
•
DCE (
Data Communication Equipment)
.
... and the type of RS-232 cable:
•
Straight-through configuration cable.
•
Null-modem configuration cable.
Using Straight-Through RS-232 Cable
DCE Configuration
CRS2F31xx-100
switch set to DTE
CRS2F31xx-100
switch set to DTE
DTE device
DTE device
RS-232 straight-
through cable
RS-232 straight-
through cable
Set the switch to DTE
configuration if the media
converter is connected to a DCE
device via a straight-through RS-
232 cable.
Set the switch to DCE
configuration if the media
converter is connected to a DTE
device via a straight-through RS-
232 cable.
DTE Configuration
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3
Set the Loop-Back Switch
The loop-back switch is located on the front panel of the media converter and is
used to debug network faults.
To set the switch, use a small flat-blade
screwdriver or a similar device.
Norm
Set the switch to “Norm” for
normal operation.
Loop
Set the switch to “Loop” to enable
both fiber and copper loop-back.
Loop
N
o
r
m
Loop
N
o
r
m
N
o
r
mal Ope
r
a
t
ion
Fibe
r
/Coppe
r
Loop Back
Installation
-- Continued
Using Null-Modem RS-232 Cable
DCE Configuration
CRS2F31xx-100
switch set to DTE
CRS2F31xx-100
switch set to DTE
DTE device
DTE device
RS-232 straight-
through cable
RS-232 straight-
through cable
Set the switch to DCE
configuration if the media
converter is connected to a
DCE
device via a
null-modem
RS-232
cable.
Set the switch to DTE
configuration if the media
converter is connected to a DTE
device via a null-modem RS-232
cable.
DTE Configuration
