http://www.dslreports.com/forum/What-is-Lightspan-or-Lightspeed-4117787 en Sat, 26 Mar 2022 03:44:35 EDT Sat, 26 Mar 2022 03:44:35 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4699150 http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4699150 Sun, 13 Oct 2002 12:17:55 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4683143 http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4683143 Fri, 11 Oct 2002 17:33:46 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4683135 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4683135 Fri, 11 Oct 2002 17:32:56 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4673250
I hope your contacts with the regulators will be helpful - if only to reinforce with Verizon management that they should consider the customers in their engineering decisions.

Actually, voltage has everything to do with communications speed on a copper wire. The signal, whether analog or digital, is transmitted from one end of the wire to the other by varying the voltage input at the source end, and installing a device at the destination end to measure the voltage changes as they occur and respond appropriately. A voltage applied at one end of the wire will diminish in intensity as the electric current travels through the wire - i.e., electrical resistance. If the applied voltage is low enough or the wire is long enough, there may be no detectable voltage change at the other end. In effect, no signal will have been transmitted. The solutions are 1) goose the voltage input so that there is enough left after the line resistance for the receiving device to detect, or 2) slow down the voltage changes and design the device on the other end to "listen" for longer intervals to detect the fainter signal. The FCC says you can't do #1 on the public phone network, so you have to do #2. Voltage limits are why analog modem download rates will never exceed 53K (in the US) and why DSL is not available at all on loops longer than 18K feet, and the higher speed DSL packages are not available on loops longer than 12K feet.

dw]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4673250 Thu, 10 Oct 2002 18:47:15 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4672687
There are two different "flavors" of Litespan, integrated and non-integrated. One retains normal dialup speeds and the other does not. Verizon engineering has chosen to use the non-integrated (slower) version in order to meet Federal requirements for sharing lines with competitors. Both types of Litespan can be included in the same system, but the engineers have chosen not to do so. It was also asserted that residential dialup speed might not have been considered as a factor in this decision.

Verizon does not guarantee any modem speed beyond that required by the average fax machine (about 9600 bps). If you get a better connection speed, then you may consider yourself lucky.

An exploratory contact has been made with NRIC (nric.org), resulting in a telephone call from a Verizon representative within that organization. (They have been very eager to address my concerns.) I intend to pursue the issue, first waiting for a response from NRIC regarding today’s conversation with the Verizon supervisor.

At this point, it seems that resolution of the problem will depend on management and engineering decisions.

(PS - I don't think voltage necessarily has anything to do with speed. If that were true, then TV transmitters [high-voltage, high-frequency] and cell phones [low voltage, higher-frequency] would be impossible. Again, these are all design decisions.)]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4672687 Thu, 10 Oct 2002 17:57:11 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4657146
- Dan]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4657146 Wed, 09 Oct 2002 03:38:14 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4654868 --
What does THIS button do.....
[text was edited by author 2002-10-08 22:15:24]
]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4654868 Tue, 08 Oct 2002 22:12:04 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4652013
I am not an electrical engineer, and so I can't quibble with you about the technical aspects of high speed converters. However, PacBellTek is correct, but for very different reason. The FCC regulations for devices on the public phone network limit the voltage at which a customer device may operate. A so-called "56K" V.90 computer modem is not permitted to send with enough voltage to get above 33K upload rates. A much more tightly controlled digital modem operated by an ISP with a direct connection to the public network may pump down to the end-consumer at up to 53K (i.e., 56K, while theoretically possible, will never be seen in real life). There may be no further intervening D/A conversions while keeping the 53K speed. The additional D/A conversion must be effected at no more than the analog rate, which with compression is 33.4 at best (though lower actual throughput is likely). That is why a local loop with a fiber segment will choke your analog modem.

Now, your notion that phone company management has an ulterior motive in deploying LiteSpan, well that may be so, but you'll never be able to prove it...

dw]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4652013 Tue, 08 Oct 2002 18:07:09 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651445 http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651445 Tue, 08 Oct 2002 17:08:04 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651266 said by lowbwtom:

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They have intentionally (by design) limited the bandwidth of the copper connections to each residence in order to "encourage" more customers to sign up for DSL.

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Completely false......the reason your speed dropped is because you now have 2 digital to analog conversions in you line where you had none on copper. 56K analog transmission will not work with more than one D/A conversion.
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What does THIS button do.....]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651266 Tue, 08 Oct 2002 16:48:36 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4651140 --
"Remember, Comrade, people who are willing to destroy an efficient telephone system may not be playing with a full deck."]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4651140 Tue, 08 Oct 2002 16:36:48 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651123
Cariad, should you possibly lock this thread?
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Note : The statements made by myself on DSL Reports are purely my own and is not in anyway to be considered indicative of the opinions of my employer or of my coworkers.]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651123 Tue, 08 Oct 2002 16:35:10 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651026 [text was edited by author 2002-10-08 17:15:18]
]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4651026 Tue, 08 Oct 2002 16:24:38 EDT http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4650194
Please try and not bump up old threads, even if you're providing an answer. Chances are the question has already been answered and the member has moved on.

If you think you can provided additional information, start a new thread, and link to the old one.

Thanks.
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Ryw in fwy na perffaith rydw in Gymraes.]]> http://www.dslreports.com/forum/Re-Litespan-limits-dialup-bandwidth-4650194 Tue, 08 Oct 2002 15:10:54 EDT http://www.dslreports.com/forum/Litespan-limits-dialup-bandwidth-4650165 http://www.dslreports.com/forum/Litespan-limits-dialup-bandwidth-4650165 Tue, 08 Oct 2002 15:07:05 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4140533 --
"Remember, Comrade, people who are willing to destroy an efficient telephone system may not be playing with a full deck."]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4140533 Thu, 15 Aug 2002 18:49:52 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4140353 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4140353 Thu, 15 Aug 2002 18:27:52 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4140219 --
"Remember, Comrade, people who are willing to destroy an efficient telephone system may not be playing with a full deck."]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4140219 Thu, 15 Aug 2002 18:13:12 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4139868 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4139868 Thu, 15 Aug 2002 17:31:16 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4135086 quote:

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I don't know where "believemenow" has obtained his information, but his description of the "Lightspan" system is confusing and inaccurate. It is not a "DSL" system at all.

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Ok, mister smarty pants AlexGBell, you seem to have all the answers, figure this one. YOU go work for verizon, YOU be a technician in the field and in the office, YOU fix DSL when it's brought across your desk, and YOU manage different teams that fix and provision these customers. YOU also need to watch how critical you are of others, you NEVER know what background people come in here with. With that said, my paragraph above IS accurate.]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4135086 Thu, 15 Aug 2002 07:58:18 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4133174
One way around that is they own VAve, which is a seperate company that doesnt have to let anyone use their equipment..

It gets pretty wierd, when a custmor calls VZ for DSL, they are not allowed to steer them off to VZave (that would be anti-competitive) they take the order and if there is no avail. copper the customer is told they cant have it. Its up to the customer to find out that VZave is in their building either by word of mouth or lobby setups by vzave every so often!

Weird how regulations screw the consumer!]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4133174 Wed, 14 Aug 2002 23:49:11 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4131093 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4131093 Wed, 14 Aug 2002 20:28:41 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4129814
Litespan, however, does not use DSL as its signal carrying system between the vault and the C.O. It is simply a mux that allows a number of different signals to be carried on fiber between a vault and a C.O. (e.g. a POTS line, a 56K data circuit, a T-1, etc. can be input at the Litespan vault, muxed into a very broadband light beam that is carried to the C.O. on fiber, and in turn presented to another Litespan where upon it is demuxed and the original signals conveyed through POTS, 56K data, T-1, etc. cards to copper and then wired through the Mainframe just as if they came into the C.O. on copper.) The Litespan product, currently made by Alcatel, can be populated and configured with various cards per service needed.

Now, there are two ways that DSL can be provided to customers through a Litespan system. The first is by purchasing actual DSL add-on cards for the Litespan system vault; these would provide the DSL signal to the customer. In the C.O. the Litespan card would not convert the signal to DSL (there is no need or reason to do this). Likely the C.O. cards would mux a number of DSL originating cards (in the vault) to a T-1 output on the C.O. Litespan unit.

See:

»www.alcatel.com/products ··· 0.jhtml

The second way of providing DSL to the customer from a vault is to put a small DSLAM in the vault. The DSLAM would have a T-1 output that is connected to a T-1 card on the Litespan unit. At the C.O. there is also a T-1 card on the Litespan. The output of the T-1 may then be muxed in to a T-3 just like the C.O. DSLAM outputs a T-3.

I am not aware of which method big V intends to use.
--
"Remember, Comrade, people who are willing to destroy an efficient telephone system may not be playing with a full deck."
[text was edited by author 2002-08-14 18:08:42]

[text was edited by author 2002-08-14 18:13:20]]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4129814 Wed, 14 Aug 2002 18:06:40 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4129490 said by TheFamilyGuy:

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This whole lightspan thing sounds like a real nightmare.

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It sounds like the Lightspan DSL technology itself has been tested and ready to deploy for awhile, but Verizon (and other ILECs) have been waiting until the CLEC access issue is "resolved."

In all fairness, internet access through cable modem can be a real nightmare as well... just ask anyone who went through the @home meltdown.

- Dan]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4129490 Wed, 14 Aug 2002 17:33:35 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4128751 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4128751 Wed, 14 Aug 2002 16:22:09 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4128542 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4128542 Wed, 14 Aug 2002 15:56:50 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125558 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125558 Wed, 14 Aug 2002 09:52:20 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125549 said by Alex G Bell:

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I believe issue had to do with the Baby Bells not wanting CLECs to install equipment in their vaults. Don't know if this is resolved yet, but the approval to allow DSL on Lightspan should open up DSL to a lot of users who formerly could not get it.

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A few weeks ago I was talking with a telco tech about Lightspan, and he told me that, as mentioned above, the delay is due to CLEC access to Verizon's remote vaults.

There are three possible outcomes:

1. Verizon would allow the CLECs to install equipment in Verizon's vaults, or

2. Verizon would build separate vaults for CLEC equipment, or

3. the FCC would not require Verizon to provide CLEC access to their vaults.

According to this tech, #3 is the most likely scenario, in which case Verizon could deploy Lightspan cards relatively quickly.

- Dan]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125549 Wed, 14 Aug 2002 09:51:44 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125416 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125416 Wed, 14 Aug 2002 09:33:03 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125283
Anybody have any suggestions on my next dilemma then? Cable may or may not be available to me immediately. That is, I may be eligible for high speed residential service at a great price or maybe only plodding along with commercial service slow speeds at triple the cost or more. I could take the cable now and probably be locked in on a contract - I don't know about that yet, or I could wait out the installation of these cards. The engineer said it should be installed in about six weeks but he also agreed with my concern that it could take another six months to test and debug the installation. Does anyone know what kind of testing is done and what kinds of problems are likely?]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4125283 Wed, 14 Aug 2002 09:07:14 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4124950 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4124950 Wed, 14 Aug 2002 08:00:26 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4123342 Now, this engineer speaks of fiber feeding your office building. Fiber is cheaper in the long run to serve dial tone customers and, as we all know, DSL will not run on it. These lightspan cards are most likely what the DSL lab has been testing for quite some time now to enable equipment to be installed further out from the CO. This equipment is basically to extend the loop length qualifications to much further lengths. It is very similar to "fiber-to-the curb" technology. In other words, your dial tone is fed from the CO like normal and most likely will be wired to the DSL equipment in the field instead of in the CO. The field equipment and the CO equipment talk so the signal can be transmitted to the rest of the network.
Hope this may help.]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4123342 Wed, 14 Aug 2002 00:26:21 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4119303 --
"Remember, Comrade, people who are willing to destroy an efficient telephone system may not be playing with a full deck."]]> http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4119303 Tue, 13 Aug 2002 17:25:31 EDT http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4118273 http://www.dslreports.com/forum/Re-What-is-Lightspan-or-Lightspeed-4118273 Tue, 13 Aug 2002 15:25:29 EDT http://www.dslreports.com/forum/What-is-Lightspan-or-Lightspeed-4117787
Is this really DSL or is it some other form of transmission?

What does this card do that FCC approval (having something to do with competition) is required yet when I call the BPU or the FCC they both tell me that data services are unregulated and there are no tariffs?]]> http://www.dslreports.com/forum/What-is-Lightspan-or-Lightspeed-4117787 Tue, 13 Aug 2002 14:33:27 EDT