FINALLY, Something I'm an expert in!!!!
O.k., Cable companies use a standard called D.O.C.S.I.S. This standard basically says how cable modems work on a hybrid fiber-coaz network. This
standard also has caps on them. That being said DOCSIS also dictates that there has to be caps on the modem.
When a cable modem first comes online, it goes through whats called DHCP. Basically this is a handshaking process where the modem broadcasts out,
saying I'm over here. The server responds saying, yea, what do you want. Modem says I want online, server says o.k., let me check billing, o.k. that
checks out, heres a config file, modem says o.k. thanks.
That config file is known as a TFTP file. It has the parameters dictacted by billing as to what speeds the modem needs to have, and what server it
needs to go to to have the client get an ip. Client being your computer(router).
Now then. Back in the day, there was a big stink about comcast rolling out servers that monitored bandwidth. Can't remember the name of it, but
Adelphia also started to secretly roll it out. THankfully, Adelphia Techs didn't know how to configure it properly, so they backed off it.
Basically, it wound up doing so much monitoring, that it slowed the people that it was monitoring so bad, that they took it out.
As far as FTTH goes(Fiber To The Home) This is a VERY feasible thing for the telephone companies to do in the cities of the U.S. That being said,
Cable companies are not going to do it. DOCSIS is rolling out a new standard DOCSIS 3, which Significantly changes how the way that the frequency
spectrum is broken up, basically pushing through more data tighter frequencies. This in turn will allow them to provide larger bandwidth between the
home and the CMTS(where it turns into fiber).
This being said, if your paying for 8 meg, and your only getting 1meg, check your signal levels on the modem.
192.168.100.1..., most modems have
an internal page that tells you what the signals are. Docsis states that they should be:
upstream - 8 to 58 ---looks good at around 45
downstream - 0 +- 15 ---- closer to 0 the better
Downstream SNR - 27 - 35.
I would type more but my wife wants me off this to go grocery shopping.
Regards,
Camain