Doug Kerr
Well-known member
By definition, all here are users of Internet access, and we may be interested in new developments in access service and technology.
AT&T now offers in many of its operating areas their new U-verse service, which can provide any or all of:
• Telephone service (1 or 2 lines).
• Internet access at a number of optional nominal rates, including 6 Mb/s downstream,1 Mb/s upstream and (in many areas) 18 Mb/s downstream, 1.5 Mb/s upstream.
• Television program service, with a wide variety of channels and (in most packages) a central digital video recorder (DVR).
In one form of the service, the service is delivered to the individual residence from a "neighborhood" fiber terminal (up to perhaps a half mile away) over very high speed digital subscriber line (VHSDL) operating over a single cable pair. In another form, the service is delivered over fiber all the way from the serving central office to the residence over fiber, using a BPON (broadband passive optical network).
We recently had all three aspects of U-verse installed at our home. Before committing to this change, I new little of the technical details of the service. Now, I know enough to be dangerous.
As usual, to make sure this newfound information doesn't get away from me, I have captured it in a new technical article, "The AT&T U-verse Service", available here:
http://doug.kerr.home.att.net/pumpkin/index.htm#U-verse
The article describes the overall architecture and operation of the service, summarizes the functions of the various system units, explains the vary flexible arrangements for interconnecting the various system units over a range of wiring media, and (in an appendix) describes the DMT (discrete multi-tone) modulation scheme used for the VDSL.
AT&T now offers in many of its operating areas their new U-verse service, which can provide any or all of:
• Telephone service (1 or 2 lines).
• Internet access at a number of optional nominal rates, including 6 Mb/s downstream,1 Mb/s upstream and (in many areas) 18 Mb/s downstream, 1.5 Mb/s upstream.
• Television program service, with a wide variety of channels and (in most packages) a central digital video recorder (DVR).
In one form of the service, the service is delivered to the individual residence from a "neighborhood" fiber terminal (up to perhaps a half mile away) over very high speed digital subscriber line (VHSDL) operating over a single cable pair. In another form, the service is delivered over fiber all the way from the serving central office to the residence over fiber, using a BPON (broadband passive optical network).
We recently had all three aspects of U-verse installed at our home. Before committing to this change, I new little of the technical details of the service. Now, I know enough to be dangerous.
As usual, to make sure this newfound information doesn't get away from me, I have captured it in a new technical article, "The AT&T U-verse Service", available here:
http://doug.kerr.home.att.net/pumpkin/index.htm#U-verse
The article describes the overall architecture and operation of the service, summarizes the functions of the various system units, explains the vary flexible arrangements for interconnecting the various system units over a range of wiring media, and (in an appendix) describes the DMT (discrete multi-tone) modulation scheme used for the VDSL.