ITU-T G.651
Multimode fiber standard
• In enterprise network, multimode fiber is becoming more In enterprise network, multimode fiber is becoming more popular in the horizontal cabling in the Fiber-to-the-Zone (FTTZ) architecture
• Bandwidth is shifting from 1Gbps to 10Gbps, therefore shrinking the power loss budget
ITU-T G.652
Standard Singlemode fiber. 4 different categories (A, B, C, D) differ in the water peak attenuation around the 1383nm window
Equivalent standards : Telcordia GR-20, IEC 60793-2, TIA/EIA-492CAAB
ITU-T G.653
Zero Dispersion Shifted Fiber (ZDSF), having zero dispersion around the 1550nm window
ITU-T G.654
Cutoff shifted and low attenuation fiber, designed mainly for submarine applications
ITU-T G.655
Non-zero Dispersion Shifted Fiber (NZDSF), having low dispersion in the 1550nm and 1625nm windows, the DWDM region. Suited for longhaul and backbone applications. Categories A, B, C, D, E differ in PMD and dispersion values
ITU-T G.656
Medium Dispersion Fiber (MDF), designed for local access and longhaul fiber ITU-T G 657 T
ITU-T G.657
Latest standard (from 2008 Jan) for FTTH application. Designed to bend at small radius of down to 10mm radius and 7.5mm radius.
Category B need not be backward compatibility with ITU-T G.652.D Loss sspecified at 1550nm.
