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espaeth
Digital Plumber
Premium,MVM
join:2001-04-21
Minneapolis, MN
kudos:2
reply to FLengineer

Re: I am with the Consumer Advocates

said by FLengineer:

If comcast is having trouble providing users with a 2Mb upstream speed, then stop selling a 2Mb upstream speed.
Shared bandwidth is an actuarial science like insurance. When claims are higher than predicted the insurance companies raise rates. If the insurance companies feels you are filing excessive claims they can cancel your policy. Broadband providers are just following a very similar strategy.

Everybody should be able to hit their max provisioned speeds at some point, but there's no way for everyone to max out their connection at the same time.


FLengineer
CCNA, CEH, MCSA
Premium
join:2007-06-26
Leesburg, FL

I realize that. Believe it or not your POTS line is the same way. Your ILEC will server a community of 1500 people with say 672 availible lines. They are counting on not everyone using the phone at the same time. However, if those trunk lines are at 75% load for a long period of time they will add more to accomodate the traffic load.



N3OGH
Yo Soy Col. "Bat" Guano
Premium
join:2003-11-11
Philly burbs
kudos:2

"We're sorry, all circuits are busy now. Please hang up and try your call again later."
--
Petty people are disproportionably corrupted by petty power…



FLengineer
CCNA, CEH, MCSA
Premium
join:2007-06-26
Leesburg, FL

1 edit

1 recommendation

Yes, exactly. But the point is the backbone of the network is upgraded to support the increased traffic load. Have you ever had a Telco tell you that they are going to start blocking calls to pagers to reduce traffic because more than half of the population that still own pagers are drug dealers?


patcat88

join:2002-04-05
Jamaica, NY
kudos:1
reply to N3OGH

Yeah, when was the last time you heard that when calling another residential number in the USA (meaning you didn't reach the PBX of some business)?


patcat88

join:2002-04-05
Jamaica, NY
kudos:1
reply to FLengineer

To upgrade a trunk line is a 15 minute line card swap. Effortless. The bigger question is, what if at a neighborhood distribution panel, there aren't enough pairs on the trunk line going back to the CO from the panel and too many people have 2-3 lines?



funchords
Hello
Premium,MVM
join:2001-03-11
Yarmouth Port, MA
kudos:6
reply to FLengineer

Is there a formula for that?

I've been trying to find a concise way to express this concept. Something like -- the system is customarily sold beyond capacity, owing to the experience that customers do not the service simultaneously.

I want to say something like:

The system should be managed in a way that allows a person to access the subscribed speed, with only rare and brief exceptions.

... and then point to examples of a familiar formula or process that explains this concept -- overselling is okay and normal, expectations are okay to make and set as long as they're in good faith and maintained.
--
Robb Topolski -= funchords.com =- Hillsboro, Oregon
HTTP is the new Bandwidth Hog...



funchords
Hello
Premium,MVM
join:2001-03-11
Yarmouth Port, MA
kudos:6
reply to N3OGH

said by N3OGH:

"We're sorry, all circuits are busy now. Please hang up and try your call again later."
RST


FLengineer
CCNA, CEH, MCSA
Premium
join:2007-06-26
Leesburg, FL
reply to patcat88

Then a telco would lay fiber if it isn't already in the ground. There is no neighborhood that can max out 2 pairs of fiber.



FLengineer
CCNA, CEH, MCSA
Premium
join:2007-06-26
Leesburg, FL
reply to funchords

Well, there is no set formula for over-provisioning. but the trunks to the central office are pretty standard. A DS1 is 24 voice channels, a DS3 is 28xDS1, beyond that is fiber using OC3, OC12, OC48, OC192, DWDM. The fiber standards aren't used to carry traditional 64Kb/s voice channels, instead they are usually used to carry ToA traffic which has your voice call on a data network. Those speeds go upto 100Gb/s using DWDM.

Most telcos have their own ratio of subscribers to availible trunk lines. I believe Embarq uses 4:1 in most cases but not positive about that.



funchords
Hello
Premium,MVM
join:2001-03-11
Yarmouth Port, MA
kudos:6

Thanks!