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CHAPTER 4: SPECIFICATIONS
Page 4-6 BRIM-F6 User’s Guide
Multimode Fiber:
Core diameter: 62.5 µm nominal
Cladding diameter: 128.0 µm maximum
122.0 µm minimum
Cable attenuation: ≤ 2.5 dB/km typical
Single Mode Fiber:
Core diameter: 8.7 µm +/- 0.5 µm
Cladding diameter: 127.0 µm maximum
Cable attenuation: ≤ 0.5 dB/km typical
Multimode Fiber Optic Cable Length
The PMD FDDI standard specifies the following:
Maximum total
cable length: 100 km (62 miles) — dual ring
200 km (124 miles) — wrapped
Maximum multimode
cable length between
adjacent nodes: 2 km (1.2 miles)
Single Mode Fiber Optic Cable Length
The SMF-PMD FDDI standard specifies the following:
Maximum total
cable length: 100 km (62 miles) — dual ring
200 km (124 miles) — wrapped
Single mode cable length
between adjacent nodes: 40 km (24 miles) maximum
25 km (15 miles) typical
Twisted Pair Cable Length
The TP-PMD FDDI standard specifies the following:
BRIM-F Book Page 6 Monday, January 29, 1996 9:26 AM