Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

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

To: SteveG who wrote (7697)	11/18/1997 9:40:00 PM
From: Jack Jackson	Read Replies (1) \| Respond to of 21342

ATML: The USB link to cut costs: biz.yahoo.com

To: SteveG who wrote (7697)	11/18/1997 9:57:00 PM
From: SteveG	Respond to of 21342

To you telco engineers with time - a puzzle, and a prize: electrodata.com

To: SteveG who wrote (7697)	11/19/1997 7:21:00 AM
From: ds1	Read Replies (1) \| Respond to of 21342

Steve sorry about the delay but usually look at SI after dinner and before going to work. <Under what conditions (presuming you WEREN'T installing ADSL) was there a need to find and remove inductance coils for Ameritech? ISDN/HDSL?> I install Hi_cap circuits for Ameritech. Hi-caps are T1 and above. What gets me into finding load coils is when the circiut does not pass all the pattern tests we run before we hand the circiut off to the subscriber. < In your experience with Ameritech, what percentage of lines in your territory would you guess had load coils, and what percentage of these had them buried?> Don't know, use to be any subscriber that was more than 18,000 feet from the Central office had to have there lines loaded, but in our area we have been placing CEV's that house the fiber mux equipment in those areas that were more than 10,000 feet from the CO's then rolling back the copper for use closer in. When this is done all these pairs have to be unloaded, because if the pairs are loaded they go through load coils every 6,000 feet except the first load out of the office which is only 3,000 feet. But to guess I would say 25% < And how many many hours (including truck roll) would you guess to remove the average load coil?> Eight hour for two people. But remember that if the pair is loaded then it probably went more than 18,000 feet so to unload a pair it would take aleast 3 holes to go into so times 3 the eight hours. But if you are going into a splice to unload a pair the engineer will most likely unload more spreading the cost. < And is there any way to check a line for them without directly testing each twiswed pair?> Not that I know of! But our records are good when it comes to loaded vs unloaded pairs. < And under what conditions does TDR accuracy decrease? Line length?> Water in the Cable will distort your line lenght, but there is a method to compensate for the water.And before you ask the question yes a TDR will show water in the cable. < And how complete did you find Ameritech's records to be regarding line conditions, including coils and taps?> Here is where there is a maked line of distinction in the outside plant. First there are the pairs that go from the CO to what we call X-boxes. These pairs 90 percent of the time go through the duct system that is the undergound vault or manholes every 1000 feet or so conneneted by 4 inch conduits or as we like to say the sewers. These pairs have a high degree of accuracy in the records as to where the load coils are and bridge tap. These pairs are called the F1's. Where the F1's come out of the duct system to meet the cables that service the local neighborhoods are called x-boxs from these x-boxs go the F2 cables. The F2 are where most of the problems are the recoreds can go from very good to the only way to find the other end of the pair is to tone it out. Hope this has helped and I hope I didn't get two long winded. DS1