D-Link DSL-1252 User Manual

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DES-1252

Before Your Begin

This Quick Installation Guide gives step-by-step instructions for setting up the D-Link
DES-1252 Fast Ethernet Smart Switch. The model you have purchased may appear
slightly different from those shown in the illustrations. For more detailed information
about the switch, its components, making network connections and technical
specifications, please refer to the User’s Manual on the CD included with your switch.

Check Your Package Contents

These are the items included with your DES-1252 purchase:

D-Link 48-Port 10/100Mbps

with 4 10/100/1000Base-T

ports and 2 Combo SFP

Smart Switch

• DES-1252

D-Link 48-Port 10/100Mbps Smart Switch with

4 10/100/1000Base-T ports and 2 Combo SFP

• CD-ROM (containing Manual and Utility
Installation)

• 100–240VAC 50/60Hz

Power Adapter

If any of the above items are missing, please contact your reseller.

©2006 D-Link Systems, Inc. All rights reserved. Trademarks or registered trademarks are the property of their respective
holders. Software and specifications subject to change without notice.

Using a powe
supply with a
different voltage rating
will damage and void
the warranty for this
product.

Setup for the DES-1252 Fast
Ethernet Smart Switch

Before physically installing the switch, please make note of the following
recommendations:
A. Install the DES-1252 in a fairly cool and dry place. Te chnical

Specifications such as operat ing t emperatures and, other impo rt ant
information can be found in the manual located on the supplied CD.

B. Install the DES-1252 in a site free from strong electromagnetic field

generators (such as moto r s), vibration, dust, and direct exposure to
sunlight.

C. Leave at least 10cm (about 4 inches) of space at the front and rear

of the switch for ventilation.

D. Visually inspect the DC power jack and make sure that it is fully

secured to the power adapter.

E. Install the DES-1252 on a sturdy, level surface that can support its

weight, or in an EIA standard-size equipment rack.

F. When installing the Switch on a level surface, attach the rubber feet

to the bottom of each device. The rubber feet cushion the switch
and protect the switch case from scratching.

Attach the adhesive rubber pads to the bottom

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Rack Mounting

The DES-1252 can be mounted in an EIA standard-size, 19-inch rack,
which can be placed in a wiring closet with other equipment. Attach the
mounting brackets to both sides of the Switch (one at each side), and
secure them with the provided screws.

Use the screws provided. Then use screws provided
with the equipment rack to mount the Switch in the rack.

Mount the Switch in the rack

Connecting Network Cables

The DES-1252 has 48 ports that support 10/100Mbps Fast Ethernet;
it also has 4 10/100/1000Base-T Ports and 2 Combo SFPs. It runs
full/half duplex transfer mode for 10/100Mbps and full duplex transfer
mode for 1000Mbps. Each port on the DES-1252 supports Auto­MDI/MDI-X. Auto-MDI/MDI-X is a feature that enables the switch to
auto sense what kind of cable is used on a port (straight or crossover).
This allows any type of cables to be used with the switch regardless
of what device is being connected.

AC Power

The Switch utilizes an AC power supply of 100~240V AC, 50~60Hz. The
power switch is located at the rear of the unit adjacent to the AC power
connector and the system fan. The switch’s power supply will adjust to
the local power source automatically and may be turned on without
having any or all LAN segment cables connected.

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Connecting The DES-1252 Fast
Ethernet Smart Switch To Your
Network

Front Panel

Twisted-Pair Ports Mini GBIC Ports

┌─────────────────────────────┐ ┌┘

└┘ └─┘
LED Indicators 10/100/1000 Base-T

Twisted Pair Ports

 10/100 BASE-TX Twisted Pair Ports (Port 1~48)

The DES-1252 is equipped with 48 Fast Ethernet twisted pair ports
that are auto-negotiable 10/100Mbps and also support auto MDI/MDIX
crossover detection. All these 48 ports can operate in half- and full­duplex modes.

 10/100/1000 BASE-T / Mini GBIC Combo Ports (Option

Port 49~50)

The Switch is also equipped with two combo 10/100/1000 Base-T /
Mini GBIC ports, supporting optional 100BASE-FX or 1000BASE­SX/LX Mini GBIC modules for fiber uplinks.

 10/100/1000 BASE-T Twisted Pair Ports (Port 51~52)

Finally there are 2 Gigabit twisted pair ports that are auto negotiable
10/100/1000Mbps with full auto MDI/MDIX crossover detection support
that can also operate in half- and full- duplex modes.

[Note: If the port is set to “Forced Mode”, Auto-MDI/MDIX is
disabled]

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