Talk:G.992.1

message: Does anyone know where the attenuation graphs came from or how they were calculated? They are not sourced. VDSL even seems a little high since most VDSL2 implementations I read about max out around 50 Mbps in a pair bonded configuration. Maybe the raw data and generating functions can be placed in the article body? (They are beautiful graphs )
Swintgs (talk) 19:59, 4 November 2008 (UTC)

message: In the "BIN quality and bit rate" section, it states that there needs to be 6dB above the noise floor per bit in a bin, but in the summary at the end it says 3 dB.
* The summary looks dubious to me, so I've added a 'citation needed' tag. Harumphy 13:36, 18 November 2006 (UTC)
thread_title:  conflicting information - dB/bit 

message: This documents says the standard expands the used frequency range allowing faster communication. However, the same standard is also mentioned as ADSL Annex B, beind ADSL over ISDN, where the ADSL takes lesser frequency range, because of the ISDN. No document on wikipedia explains the difference between Annex A and Annex B, nor it is mentioned anywhere. However, ISP's and modem producers use this technology and relevant information is not available. If somebody could comment on this, it would be very much welcomed. 87.244.183.56 18:36, 16 December 2006 (UTC)
thread_title:  other conflicts 

message: With a rate of 4000 data frames per second and a maximum of 255 bytes (maximum RS codeword
size) per data frame, the ADSL downstream line rate is limited to approximately 8 Mbit/s per latency path. The line rate limit can be increased to about 16 Mbit/s for the interleaved path by mapping two RS codewords into one FEC data frame (i.e. by using S = 1/2 in the interleaved path). S = 1/2 shall be used in the downstream direction only over bearer channel AS0. Support of S = 1/2 is optional.  —Preceding unsigned comment added by 89.164.130.67 (talk) 20:01, 13 October 2007 (UTC)
thread_title:  8 Mbit/s limit 

message: According to the quick-fail criteria of the GA nominations process, any article that has "a complete lack of reliable sources" as required by WP:V, must be failed immediately and does not require an in-depth review. All GA-class articles must fully comply with Wikipedia's verifiability policy. This means that reliable sources must be set aside in a special References section and inline citations to these sources must be made. Please remedy the lack of verification in the article before choosing to renominate. If you feel this review was in error, you may request a reassessment. Thank you for your work so far, VanTucky 01:53, 10 January 2008 (UTC)
thread_title: Quick-failed GA nomination

message: It was stated that neighboring bins overlap, and there is no interference due to orthogonality in OFDM.  But, if I understand OFDM correctly, each "bin" represents a QAM constellation made of two orthogonal sinusoids ... but they are not (by my calculations) orthogonal to the sinusoids in the neighboring bins.  For example, bin 1 (f = 4.3125kHz) has a cos(2πft) component and a sin(2πft) component which are orthogonal.  But bin 2 has a cos(4πft) component and a sin(4πft) component, which are not orthogonal to bin 1's components.
Can someone who knows more than me about this verify?
Keithnazworth (talk) 20:24, 7 March 2008 (UTC)
thread_title:  Overlap of Neighboring Bins 

message: Mange01 (talk) 08:05, 5 May 2008 (UTC)
thread_title:  Feel free to add ADSL/G.992 columns to the [[OFDM system comparison table]] 

message: "Line rate obtainable (Mbit/s) against corresponding line length (km) for ADSL, ADSL2+ and VDSL" graph. It has ~12 Mbaud data rate peak, contrary to 8 Mbaud in second graph (line rate vs attenuation). Also, does not reflect the extra throughput at -80dB available in ADSL2 compared to ADSL, as evident in second graph. Is the first graph erroneous, or am I mistaken?
Incidentally, what is the max upload rate for G.DMT? The article says 1.3 Mbaud, but Cisco says 864 kbaudhttp://www.cisco.com/en/US/tech/tk175/tk272/tsd_technology_support_protocol_home.html.
64.180.126.80 (talk) 06:16, 4 May 2009 (UTC)
thread_title:  first graph incorrect? 

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thread_title: File:ADSL Line Rate Reach.gif Nominated for Deletion