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Technology Stocks : Westell WSTL -- Ignore unavailable to you. Want to Upgrade?

To: Trey McAtee who wrote (7668)	11/17/1997 6:38:00 PM
From: bill c.	Respond to of 21342

Trey/Steve: On the issue of bridge taps, I don't recall the technical details, but ADSL does operate with bridge taps. Load coils MUST be removed... until later.

To: Trey McAtee who wrote (7668)	11/18/1997 9:39:00 AM
From: NYBellBoy	Read Replies (1) \| Respond to of 21342

westell/amati fans - the experienced outside plant people in the RBOCs know their areas very well. The documentation of local loop items such as bridge taps and load coils is not that accurate, but don't worry about the good techs clearing these lines. :) BellBoy

To: Trey McAtee who wrote (7668)	11/18/1997 9:42:00 PM
From: SteveG	Respond to of 21342

<i remember a report i read about bridge taps being used exhaustively in rural loops. not nearly as much in urban areas.> Bridge taps are often found in areas of greater copper density (ie, most cities - the larger, usually the more taps). Fwiw, from a telco article: "...Telephone companies usually follow major arteries and their cross streets when installing cables. Whenever these cables cross, a junction box is provided. If new service is requested, a connection is made at the nearest junction box and later if that service is stopped, the service on that line is denied by a digital command to the SLIC at the central office. If another new service request comes for a site a couple of blocks down, the telephone company may use the same line on the main artery and simply connect to the junction box two blocks down. If they don't remember to disconnect the first cross street cable, the new line will consist of a cable between the central office and the new site PLUS an open ended piece of cable going down the first cross street. This is called a bridged tap and it is quite possible to have more than one on a line. Because it is open ended and not terminated, it is simply a large capacitor connected across your line. It's a great source of noise and its capacitance is more sensitive to the environment than a discrete capacitor would be. Also, its presence will make hybrid balance difficult. Bridge taps are a fairly common problem...." Steve