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Andr ás Kovács NIIF /HUNGARNET akov@niif.hu

Optical technologies: XENPAK, XFP and DWDM. Andr ás Kovács NIIF /HUNGARNET akov@niif.hu. Josef Vojt ě ch CESNET josef.vojtech @ cesnet . cz. XENPAK interface I. MultiSource Agreement (MSA) Group: March, 2001 – open to any organization Initiators: Agilent Technologies + Agere Systems

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Andr ás Kovács NIIF /HUNGARNET akov@niif.hu

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  1. Optical technologies:XENPAK, XFP and DWDM András Kovács NIIF/HUNGARNET akov@niif.hu Josef Vojtěch CESNET josef.vojtech@cesnet.cz The SEEFIRE project is co-funded by the European Commission under the FP6 IST contract no. 15817

  2. XENPAK interface I. • MultiSource Agreement (MSA) Group: • March, 2001 – open to any organization • Initiators: Agilent Technologies + Agere Systems • Members > 20 • IEEE 802.3ae conform 10GE module definition • Result: “standard”, interchangeable 10GE interface • MSA covers: • XENPAK spec. for all PHY media defined by IEEE 802.3ae • Physical dimensions • Electrical interface (70-pin) and signal spec. • Optical connector specification (SC) • http://www.xenpak.org SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 2

  3. XENPAK interface II. • Available XENPAK types: • 10GBase-CX4: copper → 15-20m • 4x Infiniband connector (no RJ-45) • 10GBase-LX4: MMF/SMF @ 1310nm → 300m/10km • WWDM (Wide-Wave Divison Multiplexing) • 1x10G multiplexed into 4 wavelengths (4x laser) • 10GBase-SR: MMF @ 850nm → 26-300m • 10GBase-LR: G.652 SMF @ 1310nm → 10km • 10GBase-ER: G.652 SMF @ 1550nm → 40km • WAN interfaces: SW, LW, EW • For OC-192/STM-64 compatibility SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 3

  4. XENPAK interface III. • Physical layout: source – MSA agreement SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 4

  5. XFP interface I. • MultiSource Agreement (MSA) Group: • XFP = 10G Small Form Factor Pluggable Module • March, 2002 – http://www.xfpmsa.org • Low cost solution • Protocol unaware 10G module definition: • 10GE • 10G Fiber Channel • OC-192/STM-64 + ITU G.709 OTN • Small (min. 16x on a 19” router card) • Market driver: high port density • Lower power cons. and heat emission • Multi rate: 9.95 Gbps - 11.09 Gbps SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 5

  6. XFP interface II. • Available XFP types: • 10GBase-SR, LR, ER @ 10.31Gbps • 10GBase-SW, LW, EW • 10G FC @ 10.52Gbps • OC-192/STM-64 @ 9.95Gbps • Lower datarates: • 1000Base-SX, LX • 1G FC: MMF/SMF (1-2x) • OC-48 • Applications: • Server network interface cards • Storage interface, storage arrays, LAN/SAN switch iface SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 6

  7. XFP interface III. • Physical layout: SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 7

  8. XENPAK vs. XFP SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 8

  9. DWDM I. • Dense Wavelength Division Multiplexing: • Multiplexing more optical signals into 1 fiber • Using different wavelengths (ref. as “lambda”) • First deployments: 1998-1999 • Drivers: • Economic use of fiber • Huge aggregated capacity • 100G or beyond using one signal not possible today SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 9

  10. DWDM II. • Fiber transmission bands: DWDM systems S, L, C bands Source: Cisco Systems SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 10

  11. DWDM III. • Channel specification: • ITU-T G.692/G.694-1 frequency grid • S, C and L band covered • 200GHz, 100GHz and 50GHz are specified by ITU-T • 100GHz spacing example: • 0.8nm/channel • 45 channels • Approx. 35nm • Stable equipment available • Can be amplified with a singe amp. • Commonly used: 100GHz spacing + 4, 8 or 16 channels SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 11

  12. DWDM equipment I. • Amplifiers: • Signal distorsion: • attenuation/modal dispersion/chromatic dispersion • 3R: Reamplification/Reshaping/Retiming • Only with OEO today • Transponder: • Wavelength conversion before/after multiplexing/dempx. • Switch/router interfaces use baseband transmission • 850nm, 1310nm or 1550nm → conversion needed • After conversion: signal fits into the ITU channel grid distance SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 12

  13. DWDM equipment II. • Transponders contd.: • DWDM “colored” GBICs exist (no transp. needed) 1x DWDM channel 1544nm 1553nm 1310nm GBIC SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 13

  14. DWDM equipment II. • Multiplexer/demultiplexer: • Multiplex several wavelengths • Demultiplex several wavelengths DMPX MPX SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 14

  15. DWDM equipment III. • Optical Cross Connect (OXC): • Optical Add Drop Multiplexer (OADM): • Detach and add a wavelength Opt. SW Opt. SW Wavelength MUX OADM SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 15

  16. ? AndrásKovács akov@niif.hu http://www.niif.hu SEEFIRE Technical Workshop – Sofia, Bulgaria, 14-15July 2005 16

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