10/100Mbps Smart Switch
DES-1218F Smart switch with 16 built-in 10/100Mbps ports and an
open slot for installation of 2 optional Fast Ethernet fiber ports.
10/100Mbps Smart Switch With Optical Fiber Module
The DES-1218F is a 10/100Mbps Smart Switch designed for departmental connection. It provides 16 10/100Mbps ports and an
open slot for optional Fast Ethernet fiber ports. This Switch Offers advanced features that include port trunking, VLANs and
priority queues, allowing a department to effectively deploy a bottleneck-free switching network that can also be easily
integrated into a larger enterprise or campus network.

16 10/100Mbps Ports
-The switch provides 16 10/100Mbps ports supporting auto-
be combined together to create a multi-link load-sharing
sensing and auto-negotiation of network speeds and full/half
aggregated bandwidth to a server. You can also configure the
duplex. These ports can connect to workstations and print
port trunk to have redundant backup links, with stand-by
servers, giving each a dedicated bandwidth. All ports support
links taking over in case of a fail-over of the active links.
auto MDI-II/MDI-X uplink, allowing you to connect to
The switch can support up to 9 port trunks.
workstations, servers, or other switches from any port
without the need to change your usual straight-through
VLANs for Enhanced Security & Performance
twisted-pair cables.
VLANs improve security and bandwidth utilization by
limiting the broadcast domains and confining intra-group
Fast Ethernet Fiber Ports
traffic within their segments. To segment up the network,
Optional Fast Ethernet fiber ports can be installed in the open
workstations connected to the switch can be grouped into
slot. Transferring data at 200Mbps full duplex over the fiber
different Virtual LANs (VLANs). Up to 18 VLANs can be
cable, these ports can be used to connect servers over the
configured for the switch.
reliable fiber cable, or to attach the switch to the network
fiber backbone.
Priority Queues for QoS
The switch supports Layer 2 802.1p Priority Queue control.
Flow Control to Prevent Packet Loss
Each packet going through the switch can be assigned a
The switch supports standard IEEE 802.3x Flow Control.
queue priority number (in the priority bit). Packets with a
Working in conjunction with buffer overrun auto-detection,
higher priority number are allowed to pass first. This
this data transfer mode provides protection against possible
function support allows you to attach IP telephony devices or
data loss for 802.3x supported servers directly connected to
video servers to the switch to run delay-sensitive
the switch.
applications like video conference and voice over the
Port Trunks for Aggregated Bandwidths
With low cost per port, port trunking provides an easy and
Port Mirroring
economical alternative solution for server connection to
This function allows you to mirror adjacent ports for the
attain Gigabit bandwidth. Up to 4 10/100Mbps ports can
purpose of analyzing incoming and outgoing packets where
packet patterns can be studied.
Key Features
16 built-in 10/100Mbps ports
Flow control (full duplex), back pressure (half duplex)
Open slot for 2 optional Fast Ethernet fiber ports
Port mirroring
Automatic MDI-II/MDI-X uplink for all twisted-pair ports
Port trunking
Secure store-and-forward switching scheme
Port enable/disable
Port-based VLANs
RS-232 console port for switch configuration
802.1p Priority Queues bandwidth control

Technical Specifications
10/100Mbps Smart Switch
Port Trunks
- IEEE 802.3 10BASE-T Ethernet (twisted-pair copper)
- Number of ports per trunk: 4 (max.)
- IEEE 802.3u 100BASE-TX Fast Ethernet (twisted-pair copper)
- Number of trunks per switch: 9 (max.)
- IEEE 802.3u 100BASE-FX Fast Ethernet (fiber)
- Operation modes: load sharing or redundant backup (per trunk)
- ANSI/IEEE 802.3 NWay auto-negotiation
- Supported port type: 10/100Mbps ports
- IEEE 802.3x Flow Control
- IEEE 802.1p Priority Queues
Port Access
Enable/disable (per port)
Number of Built-in Ports
16 10/100Mbps Fast Ethernet ports
Console Port
DB-9 RS-232 DCE

Physical & Environmental
Data Transfer Rates
LED Indicators
- Ethernet:
- Per 10/100Mbps port: 100Mbps speed, Link/Act
10Mbps (half duplex)
- Per device: Power
20Mbps (full duplex)

- Fast Ethernet:
AC Input
100Mbps (half duplex)
100 - 240 VAC, 50/60 Hz
200Mbps (full duplex)
Internal universal power supply

Power Consumption
22 watts (max.)
Network Cables
- 10BASE-T:
40 x 40 mm DC fan x 1
2-pair UTP Cat. 3, 4, 5 (100 m)
EIA/TIA-586 100-ohm STP (100 m)
- 100BASE-TX, 1000BASE-T:
441 x 207 x 44 mm (17.36 x 8.15 x 1.73 inches)
UTP Cat. 5 (100 m max.)
19-inch rack-mount width, 1 U height
EIA/TIA-568 100-ohm STP (100m max.)

- 100BASE-FX:
50, 62.5/125 micron multi-mode fiber-optics (2 km max.)
2.6 kg (5.73 lb.)
Full/half Duplex
Operating Temperature
- Full/half duplex for 10/100Mbps twisted-pair
0 - 50 C (32 - 122 F)
- Full duplex only for Fast Ethernet fiber

Storage Temperature
Media Interface Exchange
-25 - 55 C (13 - 131 F)
MDI-II/MDI-X auto uplink for all twisted-pair ports
Twisted-pair Rx Reverse Polarity
5% - 95% non-condensing
Flow Control
Ordering Information
- IEEE 802.3x Flow Control in full-duplex
- Back pressure in half-duplex
10/100Mbps Smart Switch

16 10/100Mbps ports
Switch Fabric
Optional Module
3.6 Gbps
2 100BASE-FX multi-mode fiber port (SC type
Connector) (supporting 2 km cable distance)
Transmission Method

MAC Address Table
At least 6K entries per device
MAC Address Learning
- Dynamic entries: automatic update
- Static entries: none
TEL: 1-949-788-0805
FAX: 1-949-753-7033
Specifications subject to change without
prior notice.
TEL: 1-905-829-5033
FAX: 1-905-829-5095
D-Link is a registered trademark of D-Link
Packet Filtering/Forwarding Rates (half duplex)
TEL: 44-20-8731-5555
FAX: 44-20-8235-5511
Corporation/D-Link System Inc. All other
trademarks belong to their proprietors.
TEL: 44-20-8731-5555
FAX: 44-20-8235-5511
- Ethernet: 14,880 pps per port
TEL: 49-61- 96779900
FAX: 49-61-967799300
- Fast Ethernet: 148,810 pps per port
TEL: 33-1-
FAX: 33-1-

TEL: 39-02-2900-0676
FAX: 39-02-2900-1723
TEL: 34-93-4965751
FAX: 34-93-4965701
RAM Buffer
TEL: 46-(0)8-564-61900 FAX: 46-(0)8-564-61901
- 384KBytes per device (excluding optional modules)
TEL: 47-22-991890
FAX: 47-22-207039
TEL: 45-43-96.90.40
FAX: 45-43-42.43.47
TEL: 358-9-622-91660
FAX: 358-9-622-91661
TEL: 65-6774-6233
FAX: 65-6774-6322
TEL: 61-2-9417-7100
FAX: 61-2-9417-1077
- Port-based VLAN
TEL: 81-3-5434-9678
FAX: 81-3-5434-9868
TEL: 86-10-88097777
FAX: 86-10-88096789
- Number of VLANs: 18 per device (max.)
TEL: 91-22-652-6696
FAX: 91-22-652-8914
Middle East
TEL: 202-2456176
FAX: 202-2456192
Priority Queues
South America
TEL: 56-2-232-3185
FAX: 56-2-232-0923
TEL: 55-11-3094-2910
FAX: 55-11-3094-2921
- Standard: IEEE 802.1p
South Africa
TEL: 27(0)126652165
FAX: 27(0)126652186
- Number of queues: 2
TEL: 7-095-737-3389
FAX: 7-095-737-3390
Rev. 01 (July 2002)
TEL: 886-2-2910-2626
FAX: 886-2-2910-1515
Printed in Taiwan
D-Link Corp.
TEL: 886-2-2916-1600
FAX: 886-2-2914-6299

Document Outline