User Manual
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100 Mbps transmission speeds, with the device at the other end of the 
cable expected to advertise in a similar manner. Depending on what 
type of device is connected, this will result in agreement to operate at a 
speed of either 10 Mbps or 100 Mbps. If an EDS RJ45 Ethernet port is 
connected to a non-negotiating device, it will default to 10 Mbps speed 
and half-duplex mode, as required by the IEEE 802.3u standard. 
Specifications 
Technology 
Standards 
IEEE 802.3 for 10BaseT, 
IEEE 802.3u for 100BaseT(X) and 
100BaseFX, 
IEEE 802.3x for Flow Control 
Processing Type 
Store and Forward 
Flow Control 
IEEE 802.3x flow control, back pressure flow 
control 
Interface 
RJ45 Ports 
10/100BaseT(X) auto negotiation speed, F/H 
duplex mode, and auto MDI/MDI-X 
connection 
Fiber Ports 
100BaseFX ports (SC/ST connector, 
multi/single-mode) 
LED Indicators 
P1, P2 (Power), 10/100M (TP port), and 
100M (Fiber port) 
DIP Switch 
enable/disable broadcast storm protection 
Optical Fiber 
100Base FX 
Multi-mode 
Single-mode 
40 km 
Fiber Cable Type  OM1 
50/125 μm 
G.652 
800 MHz*Km 
Typical Distance 
4 km 
5 km 
40 km 
Wavelength 
Typical (nm) 
1300 
1310 
TX Range (nm) 
1260 to 1360 
1280 to 1340 
RX Range (nm) 
1100 to 1600 
1100 to 1600 
Optical Power
TX Range (dBm) 
-10 to -20 
0 to -5 
RX Range (dBm) 
-3 to -32 
-3 to -34 
Link Budget (dB) 
12 
29 
Dispersion Penalty 
(dB) 
3  1 
Note: When connecting 40 km single-mode fiber over a short distance, 
we recommend putting an attenuator to prevent the transceiver from 
being damaged by excessive optical power. 
Typical Distance: To reach the typical distance of a specified fiber 
transceiver, please refer to the following formula: Link budget(dB) > 
dispersion penalty(dB) + total link loss(dB). 
Power 
Input Voltage 
12/24/48 VDC (9.6 to 60 VDC) 
Input Current @ 24 VDC 
0.1 A (EDS-205A) 
0.11 A (EDS-205A-M/S) 
0.07 A (EDS-208A) 
0.1 A (EDS-208A-M) 










