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= DWDM =
 * [[http://www.packetlight.com/technology/white-papers/active-passive-optical-networks|Active vs Passive]] recommends active.
 * 201405 - http://www.infinera.com  100GB x 5
 * 201311 - DWDM Equipment
   * http://www.packetlight.com/technology/single-fiber   - Single Fiber solution  , up and down same fiber 22 Channels.
   * http://www.packetlight.com/products/passive-wdm-solutions/pl-300 - Passive - Need color optics.
     * Supports both single and dual fiber operation
     * Compliant with all optical networking products (ITU grid)
     * Low cost fully passive optical layer solution, transparent to service rate and type

 * [[http://www.networkworld.com/community/blog/confused-10gbe-optics-modules?source=NWWNLE_nlt_cisco_2010-06-14|10Gbe Optics]]
 * [[http://www.cisco.com/en/US/docs/optical/15000r5_0/planning/guide/r50appc.html|Cisco DWDM]] overview
 * Densewave devision multiplexing
 * Putting multiple 10G optical streams on different wavelenght down the same fiber.

 * [[http://www.cisco.com/en/US/prod/collateral/modules/ps5455/prod_white_paper0900aecd8054d53d.html|Cisco 32 Channels]] 
 * [[http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6576/data_sheet_c78_489725.html| Cisco X2 DWDM]] modules
 * [[http://www.cisco.com/en/US/products/hw/optical/ps2011/products_technical_reference_chapter09186a00802342e0.html#wp1037034|Optical power budget]]
 * [[http://www.cisco.com/en/US/products/hw/optical/ps1996/ps1999/index.html|Cisco ONS 15216]] passive DWDM combiner.
   * 1U. This unit offers four module slots arranged horizontally. Each slot can accommodate one multiplexer, demultiplexer, combiner, or splitter module. Two slots, either the two rightmost or two leftmost, can accommodate a variable optical attenuator (VOA) module.
   * [[http://www.cisco.com/en/US/products/hw/optical/ps1996/products_data_sheet09186a0080179158.html|Modules]]
   * Cisco ONS 15216 !FlexLayer 8-Channel Filter
     * 100-gigahertz (GHz) 8-x-1 wavelength unidirectional multiplexer or a 100-GHz 1-x-8 wavelength unidirectional demultiplexer.
   * Metro Erbium Doped Fiber Amplifier 17 dBm (15216-EDFA1= WMM4Y80BRA )
     * [[http://www.cisco.com/en/US/products/hw/optical/ps1996/prod_bulletin09186a0080091f97.html#wp30088|Amp]]
 * [[http://www.cisco.com/en/US/products/hw/optical/ps2011/ps2012/index.html|Cisco ONS 15501 Erbium-Doped Fiber Amplifier (EDFA)]]
 * [[http://www.cisco.com/en/US/prod/collateral/modules/ps5455/product_data_sheet0900aecd806a1c36.html|Cisco® enhanced wavelength-division multiplexing (EWDM)]]
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