JetNet 4508

Key Features:

JetNet 4508

JetNet 4508 Industrial 8-port Managed Fast Ethernet Switch

– 8 10/100TX ports with Auto MDI/MDI-X
– 32G bps Non-Blocking, 8K MAC address table
– Multiple Super Ring (recovery time <5ms), Rapid Dual Homing, Multiple Ring, and MSTP / RSTP
– VLAN, Private VLAN, QinQ, GVRP, QoS, IGMP Snooping V1/V2/V3, Rate Control, Port Trunking, LACP, Online Multi-Port Mirroring
– IEEE 802.1AB LLDP and Korenix NMS for auto-topology and group management Supports Modbus TCP/IP for Factory Automation
– Supports SNMP, Web, Telnet In-Band, Serial Out-Band Management
– Embedded Hardware Watchdog for System Auto Rescue
– Dual DC10~60V Power Inputs with Redundancy
– railway installations
– IP31 rugged aluminum case
– Operating temperature: -25~70oC (JetNet 4508 V2) and -40~75oC (JetNet 4508-w V2)


Product Details



IEEE 802.3 10Base-T Ethernet
IEEE 802.3u 100Base-TX Fast Ethernet
IEEE 802.3x Flow Control and Back-pressure
IEEE 802.1AB Link Layer Discovery Protocol (LLDP)
IEEE 802.1p Class of Service (CoS)
IEEE 802.1QinQ
IEEE 802.1D-2004 Rapid Spanning Tree Protocol (RSTP)
IEEE 802.1s Multiple Spanning Tree Protocol (MSTP)
IEEE 802.3ad Link Aggregation Protocol (LACP)
IEEE 802.1x Port Based Network Access Protocol
IEEE 1588 Precision Time Protocol (PTP)
Modbus TCP/IP


Switch Technology  Store and Forward Technology with 32Gbps Switch Fabric.
System Throughput 26 Mega packets per second, 64 bytes packet size
14,880 pps for 10Base-T
148,800 pps for 100Base-TX (PPS: Packet Per Second)
CPU performance 32 bits ARM-9E running at 180 MHz
and performance up to 200MIPS; Embedded hardware
based watchdog timer.
System Memory 8M bytes flash ROM, 64M bytes SDRAM.
Transfer packet size 64 bytes to 1522bytes (includes 1522
bytes VLAN Tag).
MAC Address 8K MAC address table.
Packet Buffer 1M bits shared memory for packet buffer.
Transfer performance 14,880 pps for Ethernet and 148,800 pps for Fast Ethernet
Relay Alarm Dry Relay output with 1A /24V DC ability. It supports multiple event reply function to alert either one of event occurred – power, port link, DI/Ring status change, Ping Reset or perform routing relay on/off behavior.
Digital Input (DI) One Digital Input with Photo Copular isolation
Digital Hi: DC 11V~30V
Digital Low: DC 10V~0V

System Management

Configuration and monitoring interface Configuration and monitoring interface:RS-232 serial console, Telnet, SNMP and Web Browser interface
The RS-232 and Telnet interfaces support Cisco like instructions
System upgrade/Backup Provides TFTP/Web interface for firmware upgrade and configuration backup, restore
Telnet & Local Console Supports command line interface with Cisco like commands and maximum 4 sessions;
the telnet interface also supports SSH
SNMP Supports v1, v2c, V3 with SNMP trap function, trap station up to 4 and can be manually configured the trap server IP address
SNMP MIB MIB II, Bridge MIB, Ethernet-like MIB, VLAN MIB, IGMP MIB, Korenix Private MIB
Korenix Utility
Supports Korenix View and Korenix NMS with IEEE 802.1AB Link Layer Discovery Protocol for device finding and link topology discovery
Network Time
Protocol: Supports NTP protocol with daylight saving function and localize time sync function.
Management IP Security
IP address security to prevent unauthorized access
E-mail Warning
4 receipt E-mail accounts with mail server authentication
System Log
Supports both Local or remote Server with authentication

Network Performance

IEEE 802.3x Flow control pause frame supports on 10/100bps with Full Duplex and Back-pressure supports on 100 / 10Mbps Half Duplex only
Port configuration Port link Speed, Link mode, current status and enable/disable
Port Trunk IEEE 802.3ad port aggregation and static port trunk; trunk member up to 4 ports and maximum 4 trunk groups.
VLAN  IEEE 802.1Q Tag VLAN with 256 VLAN Entries and provides 2K GVRP entries 3 VLAN link modes- Trunk, Hybrid and Link access
Private VLAN
Direct client ports in isolated/community VLAN to promiscuous port in primary VLAN
Double VLAN Tag in an Ethernet frame
Class of Service
IEEE 802.1p class of service; per port 4 priority queues.
Traffic Prioritize
Supports 4 physical queues, weighted run robin queuing (WRR 8:4:2:1) and Strict Priority scheme, which follows 802.1p COS tag and IPv4 ToS/ Diffserv information to prioritize the traffic of your industrial network
IGMP Snooping
IGMP Snooping V1/V2/V3 for multicast filtering and IGMP Query mode; also support unknown multicasting process forwarding policies-drop, flooding and forward to router port.
Rate Control
Ingress filtering for Broadcast, Multicast, Unknown DA or all packets. Egress filtering for all packet types.
Port Mirroring
Online traffic  monitoring on multiple selected ports
Port Security
Port security to assign authorized MAC to specific port
DHCP Client, DHCP Server with IP & MAC Address binding and DHCP agent (option 82).
IEEE 802.1x
Port based network access control
Login by Radius account/password, Key for Radius Server Authentication
Modbus TCP/IP
Supports open protocol- Modbus TCP/IP with function code group -4 for factory automation application.

Cyber Network Redundancy

Multiple Super Ring (MSRTM ) New generation Korenix Ring Redundancy Technology, Includes Rapid Super Ring, Rapid Dual Homing, TrunkRingTM, MultiRingTM and backward compatible with legacy Super RingTM
Rapid Dual Homing (RDHTM )  Multiple uplink paths to one or multiple upper switch
Integrate port aggregate function in ring path to get higher throughput ring architecture
MultiRingTM  Couple or multiple up to 16 Rapid Super Rings, JetNet 4508v2 supports up to 4 Fast Ethernet Ring in one Switch
IEEE802.1d IEEE802.1D-2004 Rapid Spanning Tree Protocol.Compatible with Legacy
Rapid Spanning Tree
Spanning Tree and IEEE 802.1w
IEEE802.1s Note-1
Supports multiple RSTP deployed in a VLAN or multiple VLANs.
Multiple Spanning Tree
IEEE802.1s MSTP, each MSTP instance can include one or more VLANs


Enclosure Port  Fast Ethernet communication port: 8 x RJ-45
RS-232 console interface: RJ-45 connector
DI/DO port: 4 pint removable terminal block
Power port: 4-pin removable terminal block
Cables  10Base-T: 2-pairs UTP/STP Cat. 3, 4, 5 cable, EIA/TIA-568B 100-ohm (100m)
100 Base-TX: 2-pairs UTP/STP Cat. 5 cable, EIA/TIA-568B 100-ohm (100m)
RS-232 serial interface Supports Cisco like command line interface for out-band management

System Diagnostic LEDs

System Power status (Green): On ( power is on applying)
Digital Input (Green): On (Digital signal is detected)
Alarm Output (Red): On (Output conductor is formed as a close circuit)
System (Green): On (the system is ready), Blinking (system is on firmware upgrade progress)
Ring Status: Green on (Ring normal) / Blinking (Ring with wrong port), Yellow on (Ring abnormal) / Blinking (device’s ring port failed)
Fast Ethernet port Link (Green On) / Activity (Green Blinking)

Power Requirements

System Power Redundant power input with polarity auto reverse protection
Input Range: 10~60V DC
System Type: Positive or Negative power source
Power Consumption 15Watts / DC 24V


Installation  DIN Rail Mounting or Wall Mounting
Case Aluminum metal case with grade 31 protection
Dimension (mm) 55(W) x 149(H) x 131.2 (D) / with DIN Rail Clip
55(W) x 149(H) x 120.6(D) / without DIN Rail Clip
Weight 0.885kg without package


Operating temperature -25 ~ 70OC (JetNet 4508 V2)
-40 ~ 75OC (JetNet 4508-w V2)
Operating Humidity 0% ~ 95%, (non-condensing)
Storage Temperature -40 ~ 85OC
Hi-Pot AC 1.5KV for all ports and power

Regulatory Approvals

EMI FCC Class A, CE/ EN55022 Radiation, Conduction, Heavy Industrial IEC/EN 61000-6-2,
EMS IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-9, Heavy Industrial IEC/EN 61000-6-4
Railway EMC EN 50121-4 and EN 50121-1
Railway Vibration/Shock IEC 61373
Free Fall IEC60068-2-32 with package Note-3
Warranty 5 years