ADSL2 Performance Reports: "Good Interim Solution"
This report from a broadband networking forum is interesting. It discusses achievable bandwidths with "next-generation DSL": ADSL2. This engineer calls it a "Good Interim Solution". The question for AT&T (and the other telcos) is this: will streaming HDTV over next-gen, DSL-based IP pipes suffice? Or we destined for another series of broken promises (e.g., ISDN, fiber rollouts to millions of homes, etc.)?
Based upon the telcos' track records, I think we can all surmise the answer to that question.
| I can shed some light on the capabilities of newer DSL technologies. I am the network engineer for a small independent telephone company, and we are currently in the process of testing IP video over our ADSL2+ network. We have been pleasantly surprised by the speeds achieved with ADSL2+. Examples of real world speeds:|
5k feet= 26400 down / 1408 up (ADSL2+)
5k feet= 23872 down / 2624 up (ADSL2+ Annex M)
14k feet= 10336 down / 960 up (ADSL2+)
14k feet= 8540 down / 1520 up (ADSL2+ Annex M)
17500 feet = 7240 down / 768 up (ADSL2+)
Loop bonding will double these speeds if needed. We are just beginning the video testing, but we have been assured that SD will consume 1.5-2.5 Mbps and HD will consume 6-9 Mbps using MPEG-4.
Let's do the math. My household might need three HDTV streams running simultaneously: me watching Fox News, my wife watching e-TV, and my kids watching
Broadband Reports Forums: Good Interim Solution