Korenix JetNet 4500 Series, Руководство пользователя

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Korenix JetNet 4500 Series Industrial Managed Ethernet Rail Switch User’s Manual 1-4
The industry-wide shift from Ethernet hubs to Ethernet switches has dramatically boosted the
bandwidth of networks and helped to eliminate congestion problems inherent with the CSMA/CD
protocol (Carrier Sense Multiple Access with Collision Detection). Since a switch operates by
learning the location of addresses and forwarding messages directly, unnecessary traffic is
greatly reduced. It will use auto-negotiation to regulate the speed and duplex of each port based
on the capabilities of connected devices. These features combine with flow control allow a 100M
node to effectively communicate with a 10M node without losing data. Connecting one device
per switch port also allows two-way, simultaneous transmission to occur (full duplex), essentially
doubling the bandwidth. Further, by segmenting a collision domain in this way, the need for
non-deterministic carrier sensing (CSMA/CD) is eliminated. The utilization of a store-and-forward
switching algorithm allows each packet to be inspected, and corrupt or redundant data to be
filtered, further eliminating unnecessary traffic that often slows a network down.
Product Features
Korenix JetNet 4500 Series products have the following features:
Supports Redundant Ethernet Super Ring, Ring Coupling and Dual Homing
Supports SNMP v1, v2c, RMON 1 (1,2,3,9 groups)
Supports IGMP with Query mode for media multicast application
Supports 802.1Q Tagged and Port VLAN
Supports email warning via Simple Mail Transfer Protocol
Supports QoS
Provides web-based reconfiguration with easy-to-use GUI
Provides redundant DC Power Inputs
Supports Alarm Relay to signal port break and/or power failure
8 10/100TX ports for JetNet 4508
Provides fiber link ability 6 10/100TX ports and 2 100FX port(s) for JetNet 4508f
Supports IEEE 802.3 10Base-T, 802.3u 100Base-TX/100Base-FX
1Mbits embedded buffer memory with 2K entry MAC address table
RJ-45 ports support auto MDI/MDI-X function
Store-and-Forward switching architecture
IEEE 802.3x flow control supported
¾
Flow control on full-duplex mode
¾
Back pressure on half-duplex mode
Supports broadcast packet filtering
Supports SNTP
Provides reverse polarity protection
Robust Aluminum case, IP30 standard
DIN-Rail/Wall-mounting/Desktop Installation