Cable multiple system operators (MSOs) have transitioned from a traditional cable TV business to a position of providing full range of services that include video, voice and data communication services. Data Over Cable Service Interface Specifications (DOCSIS®) are a key to making this transition happen.

DOCSIS® 3.0 is the latest standard developed by CableLabs that incorporates many enhancements compared to DOCSIS® 2.0, making it more than sufficient to compete with Digital Subscriber Line and Fiber to the Home services.

  • Channel bonding provides MSOs with a flexible way to significantly increase speeds to customers, with compliant devices supporting up to several hundred megabits of bandwidth. This not only provides MSOs with a low-cost means of delivering IPTV services, but help MSOs sell into the small and medium-size enterprise market.
  • IPv6 support helps MSOs seamlessly transition to IPv6 networks, solving the problem of designating IPv4 addresses that are already exhausted.
  • Enhanced multicast capability allows for better integration with IPTV services.
  • Enhanced MAC layer security mechanisms, including support for Advanced Encryption Standard, provide MSOs with better service protection.

EuroDOCSIS is a variation of DOCSIS standard applied for Europe. With more channels bonded, EuroDOCSIS permits more bandwidth to be allocated to the downstream data path toward the users.

Compliant with DOCSIS 3.0 and EuroDOCSIS, D-Link cable modems increase download speeds at up to eight times more than DOCSIS2.0 for the enjoyment of popular applications such as file sharing, audio and video streaming, website uploading and IPTV.

D-Link cable modems are DOCSIS CableLabs certified, which ensures compatibility with all DOCSIS compatible cable providers.

Through recent technological evolutions, the latest standards of cables, xDSL and xPON can now provide 10 to 100 Mbps of bandwidth. Rapidly growing Internet bandwidth provides a good means for service providers to offer Triple Play, a service that unites video, voice and data on a single subscriber line. Triple Play allows service providers to differentiate themselves, increase opportunity costs for customers who may want to choose between service providers, and permit cross-selling for services beyond legacy offerings. Triple Play also benefits businesses and consumers, allowing them to enjoy multiple services with a lower cost of ownership.

As Triple Play is becoming popular, the offered services are no longer limited to IPTV, VoIP and Internet surfing. More and more value-added applications, for example, on-line gaming, music downloading, and Video on Demand, are included in the offerings to form a total solution for home entertainment.

Quality of Service (QoS) is one of the key success factors for Triple Play. When multiple services are offered, prioritization is needed to guarantee the services.

D-Link provides a variety of Integrated Access Devices (IADs) that suit the deployment of Triple Play service. An IAD provides all the functions that your home needs to establish a fast, secure Internet connection, and to make and receive Internet calls. Compliant with Home Gateway Initiative Smart QoS, the IAD automatically detects the type of connected devices and assign pre-defined priority for each device. This QoS support allows users to enjoy high transmission for applications such as IPTV, VoIP and online gaming.

Additionally, many D-Link IADs support wireless. This provides the Triple Play service to mobile devices at home, enabling a so-called ‘Quad Play’ service that includes video, voice, data and mobility.


Fiber to the Home (FTTH) is widely recognized as the optimal solution for providing broadband to new and existing communities. Unlike xDSL and cable services that take advantage of legacy telephone lines and TV cables, FTTH involves the installation of optical fiber from a central office to homes. Although the bandwidth of current FTTH services is around 10s of Mbps, the investment in fiber deployment actually future-proofs the infrastructure to meet the bandwidth demands of hundreds of Mbps to 1 Gbps per subscriber line in the next decade.

An innovative technology for FTTH implementation, Gigabit Passive Optical Network (GPON) provides unprecedented bandwidth (up to 2.5 Gbps downstream rate, shared by up to 128 premises), and a greater distance from a central office (20 to 40 kilometers, as opposed to 4~5 kilometer for DSL), allowing service providers to enable bandwidth-intensive applications and establish a long-term strategic position in the broadband market.

GPON utilizes point-to-multipoint topology. A passive fiber splitter is used to split the fiber to multiple premises, thus reducing the amount of fiber and central office equipment required compared with point-to-point architectures. The passive nature of GPON eliminates the use of electricity, making it possible to install the splitter in a place where power is not easy to acquire. It is also more energy efficient.

GPON Optical Network Terminal devices deliver high-speed voice, data and video services to residential and business subscribers. They leverage the extraordinary bandwidth of GPON technology, providing a reliable, long-reach last-mile connection by extending the public high-bandwidth network to those living and working in remote homes and home offices.

Digital Subscriber Line (DSL) is a family of technologies that transmits digital data over a local telephone network line. For over a decade, DSL has been the most adopted last-mile technology in the broadband market. As it makes use of telephone lines, DSL is the most convenient and cost effective way to enable Internet connections on legacy infrastructure.


Asymmetric Digital Subscriber Line Version 2 Plus (ADSL2+), a technology of the xDSL family, is widely adopted nowadays among other xDSL technologies. Commonly offered in highly-populated metropolitan areas, ADSL2+ is also a favored solution for sparsely populated areas with fewer multidwelling units, where DSL is more cost-effective than FTTH/B (Fiber to the Home / building) solutions. ADSL2+ data rates can be as high as 24 Mbps downstream and up to 1.4 Mbps upstream depending on the distance from a Central Office (CO) to the business or home premise.


Designed to support the wide deployment of triple play services, Very High Speed Digital Subscriber Line 2 (VDSL2) offers ultra-high data rates of up to 100 Mbps (at 500m from a CO), providing sufficient bandwidth for VoIP, HDTV, and on-line gaming services. To maintain the high data rate, a typical deployment scenario of VDSL2 uses FTTB/C (Fiber-To-The-Building / Curb) as its backbone.

D-Link provides an array of ADSL2+/VDSL modems and routers to fulfill the various demands of Service Providers and end-customers. With the support of Remote Support System (RSS), D-Link DSL routers minimize the time needed to troubleshoot problems on home networks, reducing operating costs and service expenses. Compliant with the Home Gateway Initiative Smart QoS, D-Link DSL routers automatically detect the type of connected devices and assign a pre-defined priority for each device. This QoS support allows users to enjoy high transmission for applications such as IPTV, VoIP, and on-line games over the Internet. The D-Link DSL modems and routers provide all the essentials that a home or small office needs to establish a high-speed remote link to the outside world.