G.992.2
Universal Asymmetric Digital Subscriber Line ( UADSL ) is an American simplified slow DSL variant that does not splinter.
History
The standard was developed by a working group of leading industrial and telecommunications companies, the Universal ADSL Working Group, based on the ITU standard T1.413 as simple, cheap DSL variant. As G.lite the development in the ITU standard G.992.2 was standardized. This technology has ( finally then also not enforced internationally because of their cost ) Cons.
Technology
UADSL is offered exclusively in the U.S. variant ADSL solution that requires no splitter to reduce installation time and reduce costs. Compared with ADSL will take 256 carrier frequencies used here only 128. Under ideal conditions, but are usually not achieved in the actual use, UADSL provides a data transfer rate for downloads of 1.5 megabits per second. Due to the high error rate of the providers only guarantee a transmission rate of 64 kilobits per second.
Disadvantages
For data transmission simultaneous phone connections were disturbed so often but a splinter was used and thus a significant part of the planned costs Vantage was destroyed. ADSL modems there were used, which contained a high-pass filter, and had incorporated into its telephone sockets, a low pass filter. Even devices were placed on the market, which integrated a low-pass filter as a " nub " in the connection cable for the phone. But this meant only that the splitter is used, no additional stand-alone device is integrated as with ADSL, but his inner life in the ADSL modem.
While today the same ADSL modems work in different countries, and differ only splinters from country to country, a unique device variant of the ADSL modem is required at UADSL because of the integrated splitter for each country. UADSL can not reach the numbers such as ADSL and therefore not associated with the mass production cost advantages therefore.
Another disadvantage arises from the integrated splitter in the ADSL modem. If the modem through a technical defect, whether the operation of the phone is no longer possible.
- Digital Subscriber Line