Managed 48-Port 10/100 Switch + 2 combo Gig copper/SFP uplinks
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48 10/100Mbps Ports for Workstations
The switch provides 48 10/100Mbps ports supporting auto-sensing and auto-negotiation of network speeds and full/half duplex. These ports can connect to workstations and print servers, giving each a dedicated bandwidth. All ports support auto MDI/MDIX uplink, allowing you to connect to workstations, servers, or other switches from any port without the need to change your usual straight-through twisted-pair cables.

Copper Gigabit for Servers
The copper Gigabit provides an inexpensive alternative solution to fiber-optic. Using your existing low-cost Cat. 5 copper twisted-pair wires as the transmission media, these ports allow you to instantly upgrade your servers to Gigabit capability without requiring you to install new, expensive fiber cables. The ports support 10/100/1000Mbps network speed auto-sensing, full/half duplex and auto MDI/MDIX.

VLANs for Enhanced Security & Performance
VLANs improve security and bandwidth utilization by limiting the broadcast domains and confining intra-group traffic within their segments. To segment up the network, nodes supporting

2 Mini GBIC Slots for Flexible Fiber Connection
2 mini GBIC slots are provided for flexible fiber connection. You can select to install an optional transceiver module in the GBIC slot for 1000BASE-SX short/medium-distance or 1000BASE-LX long-distance fiber backbone attachment.Use of the mini GBIC will disable their corresponding built in copper 10/100/1000Mbps copper connections.

VLANs for Enhanced Security & Performance
VLANs improve security and bandwidth utilization by limiting the broadcast domains and confining intra-group traffic within their segments. To segment up the network, nodes supporting IEEE 802.1Q VLAN Tagging connected to the switch can be grouped into different Virtual LANs (VLANs). The switch also supports GVRP (GARP VLAN Registration Protocol) for automatic VLAN configuration distribution.

Priority Queues for QoS
The switch supports Layer 2 802.1p Priority Queue control. Each packet going through the switch can be assigned a queue priority number (in the priority bit). Packets with a higher priority number are allowed to pass first. This function support allows you to attach video servers to the switch to run delay-sensitive applications like video conference.

IGMP Snooping for Broadcast Control
The switch listens to IGMP (Internet Group Management Protocol) messages to build mapping table and associate forwarding filters. It dynamically configures the switch ports to forward IP multicast traffic only to those ports associated with multicast hosts.

Port Mirroring
This function allows you to mirror adjacent ports for the purpose of analyzing incoming and outgoing packets where packet patterns can be studied.

Port Trunks for Aggregated Bandwidths
Port trunking on 10/100Mbps ports provides an economical alternative for server connection to attain Gigabit bandwidth. Up to 8 10/100Mbps ports can be combined together to create a multi-link load-sharing aggregated bandwidth to a server. 

General features

- IEEE 802.3 10BASE-T Ethernet
- IEEE 802.3u 100BASE-TX Fast Ethernet
- IEEE 802.3ab 1000BASE-T Gigabit Ethernet
- IEEE 802.3z Gigabit Ethernet
- ANSI/IEEE 802.3 NWay auto-negotiation
- IEEE 802.1Q Tagged VLAN
- IEEE 802.1p Priority Queues
- IEEE 802.1D Spanning Tree Protocol
- IEEE 802.1W rapid STP*
- IEEE 802.13ad Link aggregation*
- IEEE 802.1x Network access control*
Number of Ports
- 48 10BASE-T/100BASE-TX ports
- 2 Combo RJ-45/mini GBIC ports for Copper Gigabit or fiber Gigabit

Data Transfer Rates
- Ethernet:
  10Mbps (half duplex)
  20Mbps (full duplex)
- Fast Ethernet:
  100Mbps (half duplex)
  200Mbps (full duplex)
- Gigabit Ethernet:
  2000Mbps (full duplex)

Network Cables
- 10BASE-T:
  UTP Cat. 3, 4, 5 (100 m max.)
  EIA/TIA-586 100-ohm STP (100 m max.)
- 100BASE-TX, 1000BASE-T:
  UTP Cat. 5, Cat. 5e (100 m max.)
  EIA/TIA-568 100-ohm STP (100 m max.)
- IEEE 802.3z:
  Single-mode and multi-mode fiber

Full/half Duplex
- Full/half duplex for 10/100Mbps speeds
- Full duplex for Gigabit speed

Media Interface Exchange
Auto MDI/MDIX adjustment for all twisted-pair ports

LED Indicators
- Per 10/100Mbps port: Link/Act
- Per Gigabit port: Link/Act
- Per device: Power, Console

Transmission Method
MAC Address Table
8K entries per device

MAC Address Learning
- Automatic update

Packet Filtering/Forwarding Rates (half duplex)
- Ethernet: 14,880 pps per port
- Fast Ethernet: 148,810 pps per port
- Gigabit Ethernet: 1,488,100 pps per port

RAM Buffer
32Mbytes per device

- IEEE 802.1Q Tagged VLAN
- Number of VLANs: 255 per device (max.)

Priority Queues (QoS)
- Standard: IEEE 802.1p
- Number of queues: 4

Spanning Tree
Standard: IEEE 802.1D

IGMP Snooping

Access Security
- VLAN based: ingress checking enable/disable
- IEEE 802.1x Port-based Network Access Control
- Port-based: disable MAC address learning per port

- Classification based on T.O.S priority
- Diffserv Support*
- 802.1w Rapid Spanning Tree Support*
- SNMP V .3 Support*
- Disable MAC address learning per port
- 802.1x Network access control Support*

Configuration & Management
Management Support
- SNMP v.1, v .2c
- RMON monitoring
- Telnet
- Command Line Interface
- Log file

- MIB-II (RFC 1213)
- Bridge MIB (RFC 1493)
- RMON MIB (RFC 1757)
- Ethernet-like MIB (RFC 2358)
- 802.1p MIB (RFC 2674)
- D-Link enterprise MIB

RMON Groups
1, 2, 3, 9 (Alarm, Statistics, History, Event)

IP Number Self-identification

Through DHCP client, Bootp client

Firmware Upgrade

Console Port
DB-9 RS-232 DCE

* Functions available in next release

AC Input
- 100  -  240 VAC, 50/60 Hz
- Internal universal power supply
Power Consumption
30 watts (max.)

Operating Temperature
0   -  40  C
Storage Temperature
-40   -  70  C
5%  -  95% non-condensing

- 441 (W) x 309 (D) x 44 (H) mm
- 19-inch standard rack-mount width, 1 U height

Emission (EMI)
- FCC Class A
- CE Class A
- C-Tick Class A
- BSMI Class A
CSA International


Order info

10/100Mbps Managed Switch
      48 10/100Mbps ports, 2 combo RJ-45/mini GBIC supporting copper, 10/100/1000Mbps and fiber Gigabit

Optional Modules
DEM-310GT Single-mode 1000BASE-LX mini GBIC Gigabit Ethernet module
DEM-311GT Multi-mode 1000BASE-SX mini GBIC Gigabit Ethernet module 


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