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    FTTB (Fiber-to-the-Building/Business)
     
    When a PON is included in a FTTB (Fiber-to-the-Building/Business) architecture, a fiber is run from the carrier's central office (CO) via optical splitters into the users office. Since Business customer requires large amount of bandwidth, GPON is the ideal solution for this application.

The FTTB market allows PONs to be used in a number of ways:
   
   
Small and medium-size businesses (SMEs) located within a mile of a fiber source, requiring small fiber builds
High-bandwidth, Triple play service set {Voice, Video and Data} for enterprises/MTUs
Municipal builds or MLECs
As a remote access or virtual POP function, whereby the PON OLT is located in an MTU and serves that building as well as delivers services to surrounding smaller buildings equipped with CPE/ONTs
     
   
     
     
   
     
     
    FTTM - Fiber to the MTU/MDU (Multi-Tenant/Dwelling Unit) Application
     
    A multiple tenant unit/multiple dwelling unit facilities have more than one business or residential tenant (i.e. office buildings, commercial business parks, hotels, college and university campus dormitories, or apartments).
Many buildings are not yet served with fiber, and older buildings with aging copper infrastructure are increasingly being retrofitted with fiber. The typical FTTM topology is based on routing a Fiber to the MDU and then using the existing copper in the building to distribute services.

Another option for FTTM deployment could be a bus architecture where the OLT resides in the basement and cascaded splitters and ONTs are located on different floors throughout the building, providing services such as Video, Voice and Data to the whole building. 		 
     
     
   
     
     
    FTTC (Fiber-to-the-Curb)
    When a PON is included in FTTC (Fiber-to-the-Curb) or FTTCab (Fiber-to-the-Cabinet), the fiber terminates at
cabinet or pedestal in the neighborhood where the signal is converted to feed the subscriber over a twisted –
copper pair using external equipment such as a DSLAM (Digital Subscriber Line Access Multiplexer).
DSLAM connects the fastest copper technology (DSL) with the fastest optical access network technology (GPON)
to homes or business.
     
   
     
   
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