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To: Joe Griffin who wrote (12307)	7/25/1998 8:48:00 PM
From: hal jordan	Respond to of 21342

Joe, I would say there are a number of significant, real world technical problems, of which crosstalk is one. Bridge taps are another serious issue which can severely limit the distance of ADSL, thus reducing the available take rate. I believe cable management to get the T1s out of ADSL binders, or vice versa, will be an absolute must. Hal

To: Joe Griffin who wrote (12307)	7/25/1998 9:08:00 PM
From: Neal Hopper	Respond to of 21342

Joe the other guys will be able to give you more technical information. The splitter in the discussion you referenced has to do with g.lite. <<Except for those backing the splitterless approach, vendors believe a filter will be needed for certain subscribers' telephones to avoid unwanted interference from the ADSL signal. Since the ADSL subscriber modem will have a filter to clean out telephony signals, we are back to using a splitter at subscribers' premises, simply calling it something different and hoping subscribers can install it themselves. With this simple filter, full-speed ADSL may be just as attractive.>> With full rate DSL (CAP/DMT) they require a splitter at the home to split the voice and data. ADSL.lite is designed (if it works) to split voice/data at the remote. Removing the need for the phone company to come to your home to install the DSL modem. If this adsl.lite works and the industry can come up with a standard, The consumer would decide deployment. This would also save 3Coms butt; they would have a product to pump in their tremendous retail channel (You ever wonder why the guy at USRX bailed out on his co). The jest of the above paragraph is that ADSL.lite isn't working like they thought. ADSL.lite is requiring a splitter at the house to keep the data talk from bleeding in to voice. Crosstalk in the bundle has been bantered around quite abit with the DMT/CAP religous types. The truth is CAP has been more wide deployed than DMT. I am sure Bell Atlantic is aware of the issues. Bill c., Hal or anyone feel free to pitch in here

To: Joe Griffin who wrote (12307)	7/26/1998 12:23:00 PM
From: Dug	Read Replies (3) \| Respond to of 21342

<Have most demonstrations and tests run have been under laboratory conditions without the "bundled" environment under ideal conditions?> Yep, thus all the trials but trial time is almost over. Network Computing & others have done real world tests that indicates problems but nothing that can't be worked out. You can bet the press will pick this out & jump up & down on it but I wouldn't think its going to stop adsl & vdsl as it's the RBOC's only means of offloading data @ a speed that is acceptable for their customers. The voice network can't handle all of this! There are times when the internet comes to a crawl. This last months earnings reports was a perfect example of this. Did anyone else notice the slowdown? Yes, I read it several times right here on SI. <Is it a technical problem?> Not much more than an ordinary analog modem first had. You still can't get 28K to connect if much noise is present unless you drop the connection speed. Line quality is everything! It would sure be ideal if the RBOC's could sit around & collect $30 per month for everyone w/ a phone line & do absolutely nothing but collect money but that's not real either. <Can it be overcome?> Yep, its just going to take a little more work than the phone companies are used to & a little motivation from the FCC. Soon w/ any luck. <Does WSTL have a solution?> Wish I knew this one. I do know that cap engineers have been working on this for sometime now but Ive seen very little detail. Its been over a year since I looked @ this & if memory serves me correct the filter could be a part of the modem design. However, Ti suggests that selling filters could be popular. <Would this prevent ASDL from being implemented?> Nope, keep in mind that its already being implemented & those who are lucky enough to have it are happy. zdnet.com Below represents my only concern right now as I feel the farther out deployment goes the harder its going to be for Wstl to succeed. I think LU is our in for now & if I don't see something concrete here by years end then Ill dump. No delays zdnet.com Below was a vague attempt in describing the purpose of a filter, like I said there is very little detail & its too complicated for me to describe as Im no EE. americasnetwork.com <Will xDSL become real this year? Yes. Will it be an effective competitor to cable modems? This is a marketing issue. If the RBOCs realize that cannibalizing their T1 business is inevitable, then they will offer prices and speed that will be competitive. Otherwise, the demand for lower Internet access prices will let most cable operators focus on adding cable drops to many locations, and eat up the T1 business, anyway.> Liked that part. :} Dug