Individual Speed Increase on a T3 Connection

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Urzu1000

Urzu1000

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Dec 24, 2013
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Not really sure how to explain this properly, so bear with me.

The company I work for has a T3 connection, and currently, my download speed while at work is limited to around 1.5mb/s. It seems very apparent that there's a 150kB/s cutoff point for a single user, but many users are able to achieve this at the same time.

It stands to reason that each user is being throttled to that speed so as to not slow down the overall network.

I work nights and after a certain point, the office is practically dead, so I wouldn't be affecting the overall bandwidth.

Is there any way I can sort of "loosen" or "ignore" the connection speed cap on a T3 network?

Hopefully I made that clear enough, thanks in advance!
 
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A T3 connection should run at 45m if you have the complete circuit. It is very possible that they have purchased a fractional ds3.

Are you really sure it is T3 and not a T1. 1.5m is almost the exact speed you will get on a T1.

In any case first step is to determine how fast the circuit is suppose to be. It is pretty easy to log into the router and display the interface and it will tell you.

But lets assume it is a full 45m ds3 circuit. The only way you would be limited is if you company put some type of traffic shaper in the path that is causing the limitation. It is actually fairly hard to limit by user especially in a large company. It is not something that would generally be defined in the router and it would be highly...
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RaDiKaL_

RaDiKaL_

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Apr 17, 2006
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To limit employees their bandwidth it's a common policy implemented in companies, most likely your network manager is the one that enforced this setting, you'd have to talk to him and ask him to disable that speed cap during night time, assuming of course he'll allow it (and if he has management approval).
 
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Pinhedd

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Nope. You will need to talk to your network administrator.
 
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bill001g

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A T3 connection should run at 45m if you have the complete circuit. It is very possible that they have purchased a fractional ds3.

Are you really sure it is T3 and not a T1. 1.5m is almost the exact speed you will get on a T1.

In any case first step is to determine how fast the circuit is suppose to be. It is pretty easy to log into the router and display the interface and it will tell you.

But lets assume it is a full 45m ds3 circuit. The only way you would be limited is if you company put some type of traffic shaper in the path that is causing the limitation. It is actually fairly hard to limit by user especially in a large company. It is not something that would generally be defined in the router and it would be highly unlikely the ISP was doing anything.

You are going to have to talk to someone in your IT department that knows how this was setup to see if there is some form of intentional restriction and why they would have a restriction.
 
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Urzu1000

Urzu1000

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I'll have a chat with a couple of the guys from the IT department then. That pretty much answered my question.

While I have you all via notification though, if someone hypothetically paid for a T3 or DS3 as it seems to be called line to be run to their residential house, could all that speed combined into just a few machines, or is that just dreaming? Not saying I'm paying for that, but I like knowing my options.
 
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bill001g

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The difference between running something like a DS3 to your house and say getting some cable modem that can do 45m is the service level. Both are likely delivered over the same type of coax.

The DS3 gives you a guaranteed 45m up and 45m down all the way to the ISP premise. You likely even get service level agreements that will promise to repair it within 4hr 24x7x365. The cable company will promise you nothing, maybe you get 45m if you are lucky and nobody else that is using it and if it breaks maybe if you are lucky we will give you a 4 hour window some day in the future where you can wait for us to come by and fix it.

Still in those times you can get 100% of the cable company circuit you will get the same results basically. On either a single machine can use the total bandwidth if the application it is running does not limit it in another way. Sometimes a web site intentionally put a rate limit on their connections so people with fast internet do not block out others.
 
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Pinhedd

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Of course. The difference between a commercial T-carrier or OC connection and a residential DSL/DOCSIS/Fiber connection is the terms of the service agreement with the ISP.

Residential DSL and DOCSIS subscriptions come with very, very few guarantees. One of the most common is the infamous "up to <X> mbps" clause which allows the ISP to dodge liability for congestion in the backhaul network, noisy or degraded lines, etc... If a customer makes enough noise they may send a technician out in a week or two.

Commercial connections such as T-carriers and OCs provide many guarantees. The connections (or the purchased fraction) are dedicated from the customer's site to the ISP's central office. A T-3 connection will always transfer up to 44.736 megabits per second in each direction between endpoints. The service agreement may also allow for emergency service, usually within 24 hours.
 
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