RAD Data comm Modular Access Device with Integrated Router Manuel D’Utilisation

FCD-IPM Installation and Operation Manual 

Appendix A  Interface Specifications and Cable Diagrams 

 

Fiber Optic Interface 

A-7 

The ISDN connector pinout is provided in 

 

3 Tx+ 

4 Rx+ 

5 Rx- 

6 Tx- 

FCD-IPM equipped with a fiber optic main link can be used to provide a secure 
link in hazardous or hostile environments, increase the maximum connection 
range, and achieve immunity against electrical interference and protection against 
the deleterious effects of ground loops. 
The fiber optic main link interface is terminated in two ST, FC/PC or SC 
connectors, in accordance with order. 

 lists the various available fiber 

optic interface types and their main specifications (Maximum ranges are calculated 
assuming a 3 dB margin). 

Wavelength [nm], 
Fiber Type [µm] 

Budget 
 
[dB] 

Typical Range 
 
[km/miles] 

850, 62.5/125, multimode 

12 

3.5/2.1 

SC, ST, FC 

1310, 9/125, single mode 

15 

33/20.5 

SC, ST, FC 

1310L, 9/125, single mode 

25 

50/31 

SC, ST, FC 

1550L, 9/125, single mode 

25 

100/62 

SC, ST, FC 

All the fiber optic interface options offer high performance and have a wide 
dynamic range. This ensures that the receiver will not saturate even when using 
short fiber optic cables (saturation is caused when the optical power applied to the 
receiver exceeds its maximum allowed input power, and results in very high bit 
error rates).