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Triple play and Quadruple play
As defined, quadruple play is a package of video, voice, high-speed Internet, and wireless services. Triple play package includes everything mentioned above but without the wireless services. These packages are the most demanded by the customers.
That is the main motivation for the service providers to develop and spread FTTx architecture. Technologies like BPON, GPON, and EPON are providing both triple and quadruple package which explains their popularity. In future however, it would be an Internet connection used for voice and video in IPTV and VoIP form as seen from Figure 1.
Figure 1. Triple play over an IP-oriented PON
The PON is having great benefit for future IP services providing enough bandwidth for all three services. Also, we should not forget lower costs in installation, operation, and maintenance. Main money-savior is the reduced amount of transmission equipment and fiber, since one feeder line can be shared by tens of subscribers.
|
Category |
Services |
Requirements |
|
Data |
High-speed Internet Private lines Frame relay ATM |
Medium bandwidth Variable latency Low or moderate losses |
|
Voice |
Plain old telephone service VoIP |
Low bandwidth Low latency Low loss |
|
Video |
Digital broadcast video Analog broadcast video HDTV Video on demand Interactive TV TV pay per view Video blog |
High Bandwidth Medium latency Very low loss |
In the “old” design with analog TV, signal is being converted to an optical form by the optical video transmitter and converted back by the set-top box located on the customers’ premises. The public switch telephone network is entering PON through the class 5 switch. While sharing the same feeder line, it might use subscribers existing twisted pair cable for distribution over the premises. The Internet is using IP router and 10/100 Base-T Ethernet cable for entering the PON and distribution, respectively.
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