Technical ADSL Question

Ruaidhri

Hi,
recently we have been learning about ADSL in college ( 4th year Networking ) and our lecturer was talking about the ADSL System Reference Model ( http://www.dslforum.org/aboutdsl/TR-001.doc , http://www.dslforum.org/aboutdsl/Technical_Reports/TR-001.pdf , http://ftp.tiaonline.org/tr-30/tr303/Public/xDSL%20Miscellaneous/ADSLF_TR007.doc )
Basically my question relates to the PDN ( Premises Distribution Network ). There is a bus called the "B" which is NOT mentioned apart from being an Auxillary Data Input.

so what is this? does it allow other TE's to connect to an aux data service? the example given mentiones a set top box. which just confuses the hell out of me ( does the set top box use the ADSL for sending data, or revieving or both? )

MadKevo

Think the PDN boils down to the 2 or 3 interface types on a real-world DSL modem to which users can connect in the year 2004: Ethernet, USB and PCI (in the case of an ADSL modem on a PCI card).
Gotta hand it to those standards guys, they obviously don't hand out prizes for calling a spade a spade!

Ruaidhri

try read the post..i know what a PDN is.basically it will boil down to ethernet (but not always). the "B" interface is defined by the DSL standard. ( the ATU-R is the ADSL modem and it's connected to the PDN by we dont care! )

MadKevo

dunno why I care, but it's a standards way of meaning "connection to another network at the customer's premises that we're not standardising so we don't care obout it". They'd lose peer credibility by actually using English though!