APPENDIX B: EPIM CABLE REQUIREMENTS

Propagation delay is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the entire network is 25.6 sec, if the total propagation delay between any two nodes on the network exceeds 25.6 sec, then bridges should be used.

B.1.3 FOIRL/10BASE-FL Single Mode Fiber Optic Cable Requirements

Table B-2 shows Single Mode Fiber Optic cable specifications for the EPIM-F3.

Table B-2. Single Mode Fiber Optic Cable Specifications

Cable Type

Attenuation

Maximum Cable Length

 

 

 

 

 

 

8/125-12/125 m

10.0 dB or less

The maximum allowable fiber

 

 

optic cable length is

 

 

5 km (3.1 miles) with bridges at

 

 

each segment end. However,

 

 

IEEE 802.3 FOIRL

 

 

specifications specify a

 

 

maximum of 1 km (1093.6

 

 

yards).

 

 

 

Attenuation

You must test the fiber optic cable with a fiber optic attenuation test set adjusted for an 1300 nm wavelength. This test verifies that the signal loss in a cable is 10.0 dB or less for any given single mode fiber optic link.

Fiber Optic Budget and Propagation Delay

Fiber optic budget is the combination of the optical loss due to the fiber optic cable, in-line splices, and fiber optic connectors. When determining the maximum fiber optic cable length, the fiber optic budget (total loss of

10.0dB or less between stations) and total network propagation delay should be calculated and considered before fiber optic cable runs are incorporated in any network design.

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BRIM-E6 USER’S GUIDE

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Enterasys Networks BRIM-E6 manual FOIRL/10BASE-FL Single Mode Fiber Optic Cable Requirements, Ieee 802.3 Foirl

BRIM-E6 specifications

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