USB Ethernet card with DSL
By pawa - usenet poster
I am having PAC Bell DSL installed in a couple of weeks and was thinking of
buying a USB Ethernet Adapter from Belkin F5U011. I know nothing about
ethernet cards and how the DSL modem is connected but was wondering if this
USB device will work with DSL. Using USB would mean that I would not have
to open the PC to install the card and give me more functinallity.
If anyone has any information about such a set up and the USB Ethernet
adapter, I would appreciate having you post a reply to this newsgroup or
replying directly to me.
Many thanks
--
Ed Miller
mill @wans.net
buying a USB Ethernet Adapter from Belkin F5U011. I know nothing about
ethernet cards and how the DSL modem is connected but was wondering if this
USB device will work with DSL. Using USB would mean that I would not have
to open the PC to install the card and give me more functinallity.
If anyone has any information about such a set up and the USB Ethernet
adapter, I would appreciate having you post a reply to this newsgroup or
replying directly to me.
Many thanks
--
Ed Miller
mill @wans.net
Solution #1
posted on Aug 10, 2005
Duke - usenet poster
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Interesting thread here.
USB is 12Mbps signalling rate but you'll never get more than about
8Mbps across it. Still, that is probably good enough for 10Mbps
ethernet. But wait....
What happens when you have additional devices on either the ethernet
or USB bus. The story gets interesting.
With ethernet, you may get a few collisions here and there, but no
real problems with typical use. You still have essentually full
bandwidth available.
With USB, it really depends upon the other devices. There are high
speed and low speed devices. Add a low speed device (mouse or
keyboard, etc.) and life starts to get tough. The signalling rate for
a low speed device is 1.5Mbps. This can foul up the bus speed
significantly. For a contrived example, imagine a low speed device
that requires about half of the low speed bandwidth. That half is
immediately removed from the total bandwidth available for high speed
devices. So now we only have about 4Mbps available for ethernet. Add
a printer, USB speakers, etc and you might have real trouble.
Maybe that doesn't matter for your ethernet connection to your ADSL
modem, but you can see how it might affect you.
As for me, I agree with another poster here... I'd get a 10/100Mbps
PCI NIC for $20 or $30 and play it safe.
Marko
USB is 12Mbps signalling rate but you'll never get more than about
8Mbps across it. Still, that is probably good enough for 10Mbps
ethernet. But wait....
What happens when you have additional devices on either the ethernet
or USB bus. The story gets interesting.
With ethernet, you may get a few collisions here and there, but no
real problems with typical use. You still have essentually full
bandwidth available.
With USB, it really depends upon the other devices. There are high
speed and low speed devices. Add a low speed device (mouse or
keyboard, etc.) and life starts to get tough. The signalling rate for
a low speed device is 1.5Mbps. This can foul up the bus speed
significantly. For a contrived example, imagine a low speed device
that requires about half of the low speed bandwidth. That half is
immediately removed from the total bandwidth available for high speed
devices. So now we only have about 4Mbps available for ethernet. Add
a printer, USB speakers, etc and you might have real trouble.
Maybe that doesn't matter for your ethernet connection to your ADSL
modem, but you can see how it might affect you.
As for me, I agree with another poster here... I'd get a 10/100Mbps
PCI NIC for $20 or $30 and play it safe.
Marko
Solution #2
posted on Aug 10, 2005
Green1 - usenet poster
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Why? No free PCI or ISA slots in your PC?
It might work but the whole idea of a USB ethernet adapter sounds kludgey
and ill-conceived. The effective bus bandwidth of USB would never be able
to support even a 10 Mb/s ethernet connection - not that you'd need it for
DSL, mind you. The additional bus protocol translation might also hamper
performance somewhat - although at DSL rates it may not be significant.
If the connection from the modem to the PC is ethernet, you can buy a PCI 10
or even 10/100 NIC for well less than $30 - an ISA NIC might be slightly
more. I would bet the USB ethernet adapter is more than $30. It's true you
would have to open the PC but installing a PCI or ISA NIC isn't that
difficult.
And you WON'T get more functionality. In fact, you could be limiting
functionality - if you have or decide to add any additional USB devices (the
new USB speakers are really cool!), they're going to be contending with your
ethernet adapter for that precious USB bandwidth.
Straight USB DSL modems are also starting to appear (i.e.,
www.efficient.com) but you should check with your DSL service provider re:
what modems are approved for use with their equipment. All modems and
DSLAMs aren't interoperable yet.
David Wickerham
dmwic @xprt.net
-----
It might work but the whole idea of a USB ethernet adapter sounds kludgey
and ill-conceived. The effective bus bandwidth of USB would never be able
to support even a 10 Mb/s ethernet connection - not that you'd need it for
DSL, mind you. The additional bus protocol translation might also hamper
performance somewhat - although at DSL rates it may not be significant.
If the connection from the modem to the PC is ethernet, you can buy a PCI 10
or even 10/100 NIC for well less than $30 - an ISA NIC might be slightly
more. I would bet the USB ethernet adapter is more than $30. It's true you
would have to open the PC but installing a PCI or ISA NIC isn't that
difficult.
And you WON'T get more functionality. In fact, you could be limiting
functionality - if you have or decide to add any additional USB devices (the
new USB speakers are really cool!), they're going to be contending with your
ethernet adapter for that precious USB bandwidth.
Straight USB DSL modems are also starting to appear (i.e.,
www.efficient.com) but you should check with your DSL service provider re:
what modems are approved for use with their equipment. All modems and
DSLAMs aren't interoperable yet.
David Wickerham
dmwic @xprt.net
-----
Solution #4
posted on Aug 10, 2005
Janice - usenet poster
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I believe USB has a bandwidth of 12mbps, 2mbps faster than 10mbps
ethernet cards. So, in theory, a USB NIC would be just fine for
anyone/anything doing 10mbps ethernet.
You're correct on it not holding a candle to 100mbps.
Jared Valentine
(anti-spam measures in place, remove "j." to reply via e-mail)
In article <36B09521.888B0 @bigfoot.com>, Spam-H @bigfoot.com says...
ethernet cards. So, in theory, a USB NIC would be just fine for
anyone/anything doing 10mbps ethernet.
You're correct on it not holding a candle to 100mbps.
Jared Valentine
(anti-spam measures in place, remove "j." to reply via e-mail)
In article <36B09521.888B0 @bigfoot.com>, Spam-H @bigfoot.com says...
Solution #5
posted on Aug 10, 2005
Cato - usenet poster
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It seems to me like the 12Mbits of USB should be enough for the 1.5Mbits of
ADSL. You'd probably want to dedicate one USB channel.
Once when I was wondering what impact USB I/O would have on my system I
hunted down USB host interface specs. I found a nice, bus mastering,
sequenced command packet oriented interface. It should be pretty easy on
the CPU. It would be okay as an interface to ADSL.
Firewire??? Firewire would be massive overkill.
--
Richard Krehbiel, Kastle Systems, Arlington VA USA
r @kastle.com (work) or krehb @crosslink.net (personal)
ADSL. You'd probably want to dedicate one USB channel.
Once when I was wondering what impact USB I/O would have on my system I
hunted down USB host interface specs. I found a nice, bus mastering,
sequenced command packet oriented interface. It should be pretty easy on
the CPU. It would be okay as an interface to ADSL.
Firewire??? Firewire would be massive overkill.
--
Richard Krehbiel, Kastle Systems, Arlington VA USA
r @kastle.com (work) or krehb @crosslink.net (personal)
Solution #6
posted on Aug 10, 2005
Hart - usenet poster
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I never heard of a USB nic. I would imagine that it would be very slow compare
to a pci. I thinhk you would be better off getting a network kit from 3com.
It comes with 4 port hub and 2 nics for like $100.
USB is not really fast enough. Wait for Firewire.
--
Toobs
<=-=;)*
Reply to "t @usa.net"
http://www.theaquabats.com/
"turn off the idiot box"
to a pci. I thinhk you would be better off getting a network kit from 3com.
It comes with 4 port hub and 2 nics for like $100.
USB is not really fast enough. Wait for Firewire.
--
Toobs
<=-=;)*
Reply to "t @usa.net"
http://www.theaquabats.com/
"turn off the idiot box"
Solution #7
posted on Aug 10, 2005
2Pansy - usenet poster
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I may be mistaken, but I believe I read somewhere that the maximum
bandwadth on a USB port is something like 1.4 megs per second. If that's the
case, you should be fine if the only thing you do is xDSL. If however you do
any type of LAN networking at 10 or 100 megs per sec, you'll be severly
limiting the speed that PC can talk to the others on the LAN.
Jeb
In article <78p0oh$es @server2.wans.net>, "Ed Miller" <edmil @wans.net>
wrote:
bandwadth on a USB port is something like 1.4 megs per second. If that's the
case, you should be fine if the only thing you do is xDSL. If however you do
any type of LAN networking at 10 or 100 megs per sec, you'll be severly
limiting the speed that PC can talk to the others on the LAN.
Jeb
In article <78p0oh$es @server2.wans.net>, "Ed Miller" <edmil @wans.net>
wrote:
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