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p/n 8450R001 EIR205 3409qsg-2/2 

© 2009 by B&B Electronics. All rights reserved 

International Headquarters: 

815-433-5100  

www.bb-elec.com 

European Headquarters:

  +353 91 792444 

www.bb-europe.com 

 

 

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Fiber Optic Cable Information 

Mode and Distance 

Type 

Wavelength 

Multi-mode (2 km) 

62.5/125 µm 

1310 nm 

Single-mode (15 km) 

9/125 µm 

1310 nm 

Single-mode (40 km) 

9/125 µm 

1310 nm 

Single-mode (80 km) 

9/125 µm 

1550 nm 

 

 

 

 

Output Power 

RCVR Sensitivity 

Multi-mode (2 km) 

-19 to -14 dBm 

 -32 dBm 

Single-mode (15 km) 

-15 to -8 dBm 

 -32 dBm 

Single-mode (40 km) 

-5 to 0 dBm 

 -34 dBm 

Single-mode (80 km) 

-5 to 0 dBm 

 -34 dBm 

MDI Cable Pinout 

Pin Signal 

1 Tx+ 
2 Tx- 
3 Rx+ 
6 Rx- 

 

 

MDI-X Cable Pinout 

Pin Signal 

1 Rx+ 
2 Rx- 
3 Tx+ 
6 Tx- 

Attach RJ45 Cable 

1. Auto MDI/MDI-x is 
supported. A straight 
through or cross-over 
cable may be used. 
2. 10/100BaseT auto 
negotiation and full/half-
duplex are supported. 
 

Attach Fiber Optic Cable 

(if equipped) 

1. Slider 

Guide 

2. Slider 

Ridges 

3. Slider 
 

1. 

Ensure your fiber optic cable is terminated with 
the correct connector type. EIR205 switches use 
SC or ST connectors. 

2. 

Fiber optic type for each port is located on the 
product’s side label. When connecting the cable 
to the switch, be sure to line up the slider guide 
on the cable and switch connectors.  

3. 

Connect the fiber optic transmitter to the 
downstream device’s receiver and vice-versa. 

Installation Complete 

1.  When the network cables are attached and power 

is applied, installation is complete. 

2.  The switch will automatically discover network 

devices, populate its MAC address table, and 
pass traffic to the appropriate ports.  

Female RJ45 

Mechanical Diagram 

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