Posted 05 July 2009 - 07:58 AM
I understand a fractional T1 allows the leasing of a portion of a T1's channels. But, I also understand a T1 line, fractional or otherwise, is a single copper wire. Data is transmitted through this copper wire as a flow of electrons across the conductive material.
Here's where my head starts to explode.
Copper (assuming uniform quality the length of the wire) has a uniform conductivity. That means, no matter how much you send through the wire, it can only handle so much - we'll assign this throughput a number of 10. Now, copper wire is copper wire: It doesn't have degrees of conductivity, right? You're either sending something through it or you're not - referring to above, a ratio of 10 or 0.
How do you restrict transmission of data down a line, to get fractional anything? It's either carrying data or not? It can't half-carry data? You can't adjust how quickly copper carries electrons (and thus, data) across its materials - that would defy laws of physics? It's not like a firehose where you can control the flow of data (water).
I know it's not even really relevant to the N+. I just need to know "fractional T1 carries some of the bandwidth and channels that a full T1 can support." But I'm trying to understand the HOW of that truth. =\