Passive Optical Networks (PONs) are an emerging broadband, multi-services, access technology allowing the benefits of fiber optic transmission to be pushed closer to the customer. New demand for bandwidth and advances in electro- optics have turned passive optical networking (PON) into an attractive option to bring fiber to the customer. PON offers cost savings up to ten times that of SONET, and is reaching cost parity with DSL and hybrid fiber coax (HFC).
There are various types of PON, technology being generally the same. The differences are in specifications and the upper layer protocols. Main PON types are listed below:
• APON – ATM PON (155M to 622M)
• BPON – Broadband PON (155M to 1.25G)
• EPON or GE-PON – Ethernet based PON (1.25G)
• GPON – Gigabit PON (622M to 2.5G)
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