Fiber To The Home GPON Overview Technology Glossary
Fiber To The Home: GPON Overview
Technology Glossary q q q BPON: Broadband PON, expanded version of APON, supports robust video services: ATM based G 683 EPON: Ethernet PON, using Ethernet for packet data - standards still unsettled: Ethernet based IEEE 802. 3 ah GPON: Gigabit PON using GEM: GPON Encapsulation Method GFP/ATM based G 684 q WDM PON: One wavelength per subscriber up to 10 Gig. E q FSAN: Full Service Access Network (FTTX) q FTTB/C/Cab/H : Fiber-to-the Business/Curb/Cabinet/Home q Rfo. G : radiofrequency over glass (instead of using coax). q CATV: Cable Television or Community Access TV q SMATV: satellite Master Antenna Television q OLT: Optical Line Terminal q ONT: Optical Network Terminator q ONU: Optical Network Unit
FTTX services - Triple play Ø Complete Voice Services Ø Ø Ø • Basic & Advanced Data Services – – – Ø Local/Long Distance Telephony features Internet based messaging (whatsapp, etc. . ) Broadband data Data/video convergence Home / SOHO networking Basic & Advanced Video Services Ø Ø Broadcast and premium channels directly from satellite or aerial (SMATV RFOG overlay) Pay Per View/Video on Demand(IPTV base) High Definition TV(IPTV or RFOG overlay) Web TV
Emergent technologies Access Competitive Market offering: MDU Yesterday: 3 -5 Mb/s (Internet / 1 SD) In 18 -36 months: >30 Mb/s (Internet + 2 HD + PVR) MDU internal distribution Network using VDSL 2 Point-to-point FTTP Gig E connection 30 -100 Mb/s to the subscribers Media converter “Today & Future” “Yesterday” Point-to-point FTTx Gig E connection Copper or Coax 15 -40 Mb/s to the subscribers ADSL 3 -5 Mb/s to the subscribers
Different penetration of GPON
GPON Typical Topologies: One and Cascaded Splitters Connector or splice
No power required at nodes Active Ethernet Switching F 1 Ethernet Switch P 2 p or Ethernet over fiber F 2 Optical RFOG Transmitters PON (Passive) IPTV GPON RF
Complete PON Architecture RFOG optical transmitter EDFA (Erbium Doped Fiber Amplifier) Voice & Data OLT (Optical Line Terminal) (EDFA is not necessary within small plants) Video 1550 nm Voice/Data & Video Downstream 1490 nm 1490 nm/1310 nm, 1550 nm ONT Optical Couplers (WDM) (Optical Network Terminal) Upstream 1310 nm 1 x 32 Or Cascade Optical Splitter Bandwidths & Services Upstream 1310 nm Voice and Data >100 Mbps 1490 nm Downstream Voice and Data >100 Mbps 47 MHz (Analog TV) 1550 nm Video 800 MHz Digital TV 2350 MHz SATELLITE IF
How is a ONT/ONU made? ONT (Optical Network Terminal) integrating WDM to divide data services from TV services Typical gpon ONU at customer WALLFIT customer socket Data Services Upstream 1310 nm Voice and Data >100 Mbps Tv services Downstream 1490 nm 1550 nm Voice and Data >100 Mbps Video 47 MHz (Analog TV) 800 MHz 2350 MHz Digital TV SATELLITE IF
FTTX challenges FTTX: • Analog signals need high power v v v TV overlay at 1550 nm v v v No need for EDFA amplifier! An optical TX serving up to 32 users Splitters in the field v v Distributing DTT and Satellite signals with best quality Releasing band for data services Short distances v v ORL and reflectances are critical Consider to dismit analogs Well defined network, with 1: 16 or 1: 32 splitters Different wavelengths 1490 nm (WWDM) v Most common WL used (1310 -1490 -1550 nm)
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