JetNet 3705f - Industrial Networking Solutions – Industrial Ethernet Switches and Routers

JetNet 3705f





The JetNet 3705f equips with 4 PoE ports, with each port delivering power up to 15.4 watts in maximum, and one 10/100Base FX fibler up-link port for long distance transmission. The JetNet 3705f conforms to IEEE 802.3af Power over Ethernet (PoE) standard. The Power Over Ethernet technology can power up PoE enabled powered devices in full capability, e.g. IP surveillance camera, wireless Access Point, VoIP phone set, POS system, security sensors, controllers and card readers.

The JetNet3705f provides standard industrial terminal block for the power and relay alarm contact output to alarm any port break or power failure. For the user’s convenience, it also provides a DC jack for the traditional AC/DC power adapter. The JetNet3705f PoE ports provide PoE auto detection of the link partner to deliver the exact power to the PD. If the link partner is not a PD or the link cable is short, or the device is broken, it will executes a series of standard procedures to avoid sending out a huge power to damage the linked device.

To successfully deliver reliable power, JetNet 3705f builds in strong protection againest abnormal working conditions including 2KV power surge protection from the power input and over-voltage protection to keep PoE output voltage in between DC 44 ~ 57V, 350mA over-load current and 450 mA short current protection. The JetNet3705f PoE function is fully in compliant with IEEE 802.3af standard, therefore all PoE protection measures are put into practice in the JetNet3705f series.

  • 1-port 10/100 FX Ethernet and 4-port IEEE802.3af PoE
  • One fiber link for long distance transmission
  • DC48V input, 15.4W output for IP camera
  • IP camera loss alarm by relay output
  • Redundant power input
  • IP31 rugged aluminum case with great heat dispersing
  • -40~70oC operating temperature (3705f-w)

IEEE 802.3 10Base-T Ethernet
IEEE 802.3u 100Base-TX Fast Ethernet
IEEE 802.3u 100Base-FX Fast Ethernet Fiber
IEEE802.3x Flow Control and Back-pressure
IEEE 802.3af Power over Ethernet
Store and Forward architecture
Number of Ports
4 x 10/100 Base-TX, Auto MDI/MDI-X, 1 x 100 Base-FX
Network Cable
10Base-T: 4-pair UTP/STP Cat. 3, 4, 5 cable, EIA/TIA-568 100-ohm(100m)
100Base-TX: 4-pair UTP/STP Cat. 5 cable, EIA/TIA-568 100-ohm(100m)
Optical Cable:
SC(Multi Mode): 50/125um or 62.5/125um
SC(Single Mode): 9/125um
Wavelength: 1310nm(Multi mode/ Single mode)
Available distance: 2km(Multi-mode)/ 30km(Single mode)
Min. TX power: -19 dBm(Multi-mode)/ -15 dBm(Single mode)
Max. TX power: -14 dBm(Multi-mode)/ -8 dBm(Single mode)
Sensitivity: -31 dBm(Multi-mode)/ -34 dBm(Single mode)
LED Indicators
Power x 3 (Green), Fault x 1(Red)
PoE x 4(Green)
Link/Activity x 5 (Green on / Green Blinking)@100Mbps, (Yellow on / Yellow Blinking)@10Mbps
Dry Relay output for port break and power fault
Transfer Rate
14,880 pps for Ethernet
148,800 pps for Fast Ethernet
Transfer packet size
64 bytes to 1522 bytes (with VLAN tag)
MAC Address
1K MAC address table
Memory Buffer
3.2 Gbps
Power Requirements
Power Supply
Input Voltage:
48VDC or -48VDC, dual inputs in terminal block connection
AC /DC Power Adapter 48VDC/ 1.6A (option)
Power input connector:
Two Power inputs via the Terminal Block (12 ~24 AWG power cable)
One DC jack for AC/D power adapter.
Reverse Polarity Protection: Present
Power Consumption:
6.5Watts without PD loading
70Watts with PD full loading
PoEPort :
Port 1~4
RJ-45 pin assignment: TX (3,6), RX (1,2), V+ (4,5), V-(7,8)
PoE Ports Output Voltage:
44 to 57VDC
DIP Switch:
Switch 1~5: Port 1~5 link down alarm Enable/Disable
Switch 6: Power fault alarm Enable/Disable.
DIN-rail kit and wall mounting
IP-31 protection, Aluminum case, Fanless design
33.8 mm (H) x 164.8 mm(W) x 108 mm (D)
Operating Temperature
Operating Humidity
5% to 95% (Non-condensing)
Storage Temperature
-40 to 85°C
Regulatory Approvals
FCC Class A, EN55022 Class A
EN61000-4-2, EN61000-4-3, EN61000-4-4, EN61000-4-5,
EN61000-4-6, EN61000-4-8, EN61000-4-11
IEC 60068-2-27
Free Fall
IEC 60068-2-32
IEC 60068-2-6

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