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FTTx ... one step ahead |
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Fiber optic access is commonly considered to be the ultimate solution for broadband connectivity. It provides virtual unlimited bandwidth and enables simultaneous delivery of
multiple services. There is no doubt that this technology will play the key role for a future-safe investment in next generation access networks.
Transparent Network Design, Well Understood Technology, Easy Management
With respect to Fiber-to-the-home networks BKtel considers the point-to-point architecture to be the most advantageous for bidirectional services such as data and telephony. For inherent unidirectional services such as TV-video the well-proven point to multipoint approach is still seen as the best solution. A comprehensive product portfolio has been created for this FTTH network topology, based on mature optical Ethernet and broadcast video distribution (the RF video overlay). The products enable the construction of high performance, high reliable and cost-effective fiber optic access networks.
Products which fit together
Next to the optical transmitters, optical amplifiers and passive optical components such as splitters and WDM filters BKtel has developed a series of customer premises equipment units. This high performance and high reliable equipment was designed with a comprehensive system concept and a unified management. |
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Optical Ethernet and RF Video Overlay:
Two Broadband Connections to your Customer
High speed optical access networks based on point-to-point Ethernet for bidirectional services such as data and Voice-over-IP have several advantages. E.g. a standardized environment with equipment available from several vendors offers an easy network planning and since a well known technology is used these networks are easy to manage. Scalability is excellent and
data rates can be adapted to the requirements of the individual customer, Fast Ethernet (100 Mb/s) up to 1G Ethernet ( 1Gb/s) are technically feasible.
Broadband video connectivity over optical fiber based on standards set by the cable-TV industry for video content provides a bandwidth equivalent to several Gb/s. Analogue TV, digital TV and even satellite TV up to RF frequencies of 2.6 GHz can be transmitted. HDTV content delivery is possible without blocking valuable bidirectional data rates. This commonly called RF video overlay solution is recognized having a high customer approval.
Fig. 1 and Fig. 2 display two general architectures used for point-to-point FTTH networks with RF video overlay. Fig. 1 shows the deployment of 2 separate fibers, one dedicated for data, one for the RF video. Fig. 2 shows the network based only on one fiber. In this case the two services are multiplexed on 3 different optical wavelengths: 1550 nm for RF video overlay and 1490 nm/1310 nm for the bidirectional data connection.
PON and RF Video Overlay
Also point-to-multipoint FTTH networks such as GPON and GEPON can integrate RF video overlay. A custom solution provided by BKtel is shown in Fig. 3.
(Please click on the pictures for larger view) |
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Ethernet Point-to-Point Topology (EPTP)
Two-Fiber-Solution
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| Fig. 1.: The two-fiber solution for point-to-point FTTH networks: A separate fiber for data/telephony and TV-video |
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Ethernet Point-to-Point Topology (EPTP)
One-Fiber-Solution
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Fig.2.: The one-fiber solution decreases the required fiber deployment by a factor of two, so that installation
costs decrease dramatically. Port-density in the POP stays the same so that only half of the POPs are
needed. |
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PON Topology (GPON, GEPON)
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Fig.3.: The RF video overlay can be realized in point-to-multipoint architectures such as GPON or GEPON.
BKtel offers a complete range of active equipment to support this application. |
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