RAD Data comm Modular Access Device with Integrated Router 用户手册
FCD-IPM Installation and Operation Manual
Appendix A Interface Specifications and Cable Diagrams
Fiber Optic Interface
A-7
A.5 ISDN Connector
The ISDN connector pinout is provided in
Table A-4. ISDN “S” Interface Pin Assignments
Pin Number
Signal Name
3 Tx+
4 Rx+
5 Rx-
6 Tx-
A.6 Fiber Optic Interface
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.
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).
assuming a 3 dB margin).
Table A-5. Fiber Optic Interface Specifications
Wavelength [nm],
Fiber Type [µm]
Fiber Type [µm]
Budget
[dB]
[dB]
Typical Range
[km/miles]
[km/miles]
Connector
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).
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).