11-06-2009, 16:14
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#1
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Inactive
Join Date: May 2006
Posts: 11
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DSL over Fibre Optics?
I'm confused...
As far as I'm aware, I'm on a Fibre Optic Internet Connection.
And I think I am Connected to a DSL Modem.
However, I have just been reading Wikipedia...
DSL
Cable Modem
Optical Fiber Communication
I can't work out whether or not I am using DSL over a Fibre Optic Cable, or if DSL Technology was replaced by Fibre Optic Technology?
Question:
If I am using a Fibre Optic Internet Connection, does this mean I must be using DSL?
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11-06-2009, 16:44
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#2
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: DSL over Fibre Optics?
DSL (Digital subscriber Line) is simply a reference to the style of connection and not the transport medium.. which in VM's case is mostly Fibre Optic with the last section being co-axial cable.
ADSL means it's Asyncronous (different upload to download speed)
SDSL means it's Syncronous (same upload and download)
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11-06-2009, 17:05
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#3
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-
Join Date: Jun 2003
Location: Somewhere
Services: Virgin for TV and Internet, BT for phone
Posts: 26,536
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Re: DSL over Fibre Optics?
Quote:
Originally Posted by John2897
I'm confused...
As far as I'm aware, I'm on a Fibre Optic Internet Connection.
And I think I am Connected to a DSL Modem.
However, I have just been reading Wikipedia...
DSL
Cable Modem
Optical Fiber Communication
I can't work out whether or not I am using DSL over a Fibre Optic Cable, or if DSL Technology was replaced by Fibre Optic Technology?
Question:
If I am using a Fibre Optic Internet Connection, does this mean I must be using DSL? |
Actually, just to confuse you, you are actually using a hybrid co-ax/fibre optic network to connect (VM's cable network uses fibre to the street cabinet and co-ax from there to your house).
However, virgin do not use a technology called DSL. The nearest we get in this country are ADSL and SDSL both of which are used over telephone lines. Cable Broadband uses it's own technology to connect to the user.
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11-06-2009, 17:22
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#4
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Inactive
Join Date: May 2006
Posts: 11
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Re: DSL over Fibre Optics?
Quote:
Originally Posted by Kymmy
DSL is simply a reference to the style of connection and not the transport medium.
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I'm still not sure I understand correctly...
So if I said to you:
"I'm on a Virgin Media Fibre Optic Internet Connection. And my PC is plugged into a Virgin Media DSL Modem."
Which reply would be more appopriate?:
- LOL!! A DSL Modem Connected to a Fibre Optic Internet Connection!!? THAT'S IMPOSSIBLE!!
- Yeh', if you have a Virgin Media Fibre Optic Internet Connection, you will more than likely require a DSL Modem.
- Yeh', if you have a Virgin Media Fibre Optic Internet Connection, you need a DSL Modem!! If your Modem is anything other than DSL, then you are definitely not using a Fibre Optic Internet Connection!
Thanks in advance. 
---------- Post added at 17:22 ---------- Previous post was at 17:15 ----------
Quote:
Originally Posted by Stuart C
Actually, just to confuse you, you are actually using a hybrid co-ax/fibre optic network to connect (VM's cable network uses fibre to the street cabinet and co-ax from there to your house).
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Ah' now I'm understanding! 
Quote:
Originally Posted by Stuart C
However, virgin do not use a technology called DSL. The nearest we get in this country are ADSL and SDSL both of which are used over telephone lines. Cable Broadband uses it's own technology to connect to the user.
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Perfect answer! 
Quote:
Originally Posted by Stuart C
Cable Broadband uses it's own technology
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That Technology wouldn't be DOCSIS would it?
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11-06-2009, 17:23
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#5
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Inactive
Join Date: Dec 2007
Posts: 18,398
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Re: DSL over Fibre Optics?
I've just tried to point out to you that the medium that you recieve the signal is different than the type of signal you get.
Genericly DSL (Digital Subscriber Line) basically means an internet line that connects you to an internet subscription and uses a digital signal. Although VM uses a variation on DSL it basically is just that where you pay for an internet connection and recieve a digital connection.
In laymans terms though DSL has been corrupted to mean the same as ADSL so although yes your modem is a DSL modem it's not a DSL modem as most people would recognise the term for.
VM supply the modem, you can't buy any other and if your question was in relation to lets say the purchase of a router then you;d need one without DSL built in as you can only use the VM modem
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11-06-2009, 17:59
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#6
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Inactive
Join Date: May 2006
Posts: 11
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Re: DSL over Fibre Optics?
Ah', your 'Second Post' shines more light on your 'First Post' Kymmy. Thanks!
---------- Post added at 17:59 ---------- Previous post was at 17:55 ----------
For anyone interested in why I wanted to know...
Letter to Virgin...
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11-06-2009, 18:39
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#7
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cf.geek
Join Date: Sep 2008
Location: Liverpool
Age: 36
Services: Sky+ TV and Virgin Media 10MB Internet.
Posts: 830
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Re: DSL over Fibre Optics?
Well, have you rang Virgin Media? Have you compared your db/power levels in your modem?
Ask them to send a technician out...and can your area even get 10MB yet? All can be found on their website or over the phone.
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11-06-2009, 20:03
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#8
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Inactive
Join Date: May 2006
Posts: 11
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Re: DSL over Fibre Optics?
Quote:
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Well, have you rang Virgin Media?
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No need. I used to be on the 10Mb/s XL (or was it XXL?) Package months ago.
I haven't phoned them. I will Email instead. They always say they will knock the cost of the call off my next bill, but they rarely ever do.
Quote:
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Have you compared your db/power levels in your modem?
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How?
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12-06-2009, 11:01
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#9
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cf.mega poster
Join Date: Oct 2005
Location: Merseyside
Age: 35
Services: BT Infinity Option 2, HH5, synced at maximum 80Mbps/20Mbps.
Posts: 2,221
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Re: DSL over Fibre Optics?
http://192.168.100.1 login with root as the user/pass. From there you can access the signal levels.
Downstream should be between -8 and +8 dBmV
Upstream should be below 55dBmV
SNR should be above 28dB
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12-06-2009, 16:29
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#10
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Inactive
Join Date: Oct 2008
Location: Norwich
Age: 35
Services: Company LLU internet, soon-to-be company FTTC internet at 56Mb/20Mb!
Posts: 1,895
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Re: DSL over Fibre Optics?
Quote:
Originally Posted by John2897
I'm confused...
As far as I'm aware, I'm on a Fibre Optic Internet Connection.
And I think I am Connected to a DSL Modem.
However, I have just been reading Wikipedia...
DSL
Cable Modem
Optical Fiber Communication
I can't work out whether or not I am using DSL over a Fibre Optic Cable, or if DSL Technology was replaced by Fibre Optic Technology?
Question:
If I am using a Fibre Optic Internet Connection, does this mean I must be using DSL? |
Depends whether your modem connects to your phone line or a length of co-ax. If the latter, it's a CABLE modem, if the former it's a DSL modem.
DSL over Fibre-optics should be entirely possible because the DSL equipment connecting you to your precious interwebs is at either end of the phone line, all you're doing is transmitting data over it. Though making that fibre-optic should mean that data rates could be upped rather a lot!
/me dreams of 100Mbit DSL...
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14-06-2009, 16:12
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#11
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Inactive
Join Date: May 2006
Posts: 11
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Re: DSL over Fibre Optics?
Quote:
Originally Posted by AbyssUnderground
login with root as the user/pass. From there you can access the signal levels.
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Thanks...
Taken at around 16:00 on 14 June 2009:
Downstream: -5.10 dBmV
Upstream: +34.0 dBmV
SNR: +34.9 dB
Is it wise to change the Password, if so, what's the Policy (Special Characters, Case Sensitive, Max' Lengh)?
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