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Message |
Guest
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 Posted:
Wed Aug 03, 2005 4:20 pm Post subject:
router-modems vs. non-router-modems |
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I've had SDSL, ADSL, and cable modem service, all with which the modem
seems to act as a router: it connects to the phone line (or cable) on
one end, and has an ethernet jack on the other end, and my computer
acquires an IP address via DHCP. Whether the modem is just forwarding
ethernet packets between my computer and a computer at the CO, or
whether the modem is decoding the ethernet packets from my computer and
forwarding just the IP packets to the CO, my computer neither knows nor
cares.
However, I recently (April 2005) got an ADSL connection with which my
computer connected to the modem via ethernet, as usual, but then had a
PPP connection over the ADSL connection to the CO, in the same way that
computers normally use PPP connections over dialup connections with
standard modems which are connected via a serial port. For this, I was
required to install a special driver so that my computer could talk to
the ADSL modem, since my OS (Windows 2000) includes drivers just for
standard dialup modems, not for ADSL modems, and presumably ADSL modems
speak a different language than dialup modems, though I don't see why
this is necessary.
My question is: since I still have that ADSL modem (a Sagem F@ST
908-E2T, and that's not a typo), but am moving and will be connecting
to a new ISP, will I have to buy a new ADSL modem if my new ISP uses
the standard modem-as-router method of connecting instead of my old
ISP's PPP-over-ADSL method of connecting? The new ISP wants to sell me
a D-Link DLK-DSL-300T, and has no idea whether my old modem is
compatible. The ISP is unwilling to bother to test my modem on their
equipment prior to my scheduled service installation date, and is
unwilling to bother to bring along a D-Link to sell me on the
installation date in case my Sagem is discovered to be incompatible, so
in that case I would have to wait another 2-3 weeks to schedule another
installation attempt.
So if anybody here can answer the compatibility question in advance,
it'd be much appreciated. |
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Kay Archer
Guest
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| Posted:
Wed Aug 03, 2005 10:30 pm Post subject:
Re: router-modems vs. non-router-modems |
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<andrewspencers@yahoo.com> wrote in message
news:1123083663.748642.101880@g14g2000cwa.googlegroups.com...
| Quote: | I've had SDSL, ADSL, and cable modem service, all with which the modem
seems to act as a router: it connects to the phone line (or cable) on
one end, and has an ethernet jack on the other end, and my computer
acquires an IP address via DHCP. Whether the modem is just forwarding
ethernet packets between my computer and a computer at the CO, or
whether the modem is decoding the ethernet packets from my computer and
forwarding just the IP packets to the CO, my computer neither knows nor
cares.
However, I recently (April 2005) got an ADSL connection with which my
computer connected to the modem via ethernet, as usual, but then had a
PPP connection over the ADSL connection to the CO, in the same way that
computers normally use PPP connections over dialup connections with
standard modems which are connected via a serial port. For this, I was
required to install a special driver so that my computer could talk to
the ADSL modem, since my OS (Windows 2000) includes drivers just for
standard dialup modems, not for ADSL modems, and presumably ADSL modems
speak a different language than dialup modems, though I don't see why
this is necessary.
My question is: since I still have that ADSL modem (a Sagem F@ST
908-E2T, and that's not a typo), but am moving and will be connecting
to a new ISP, will I have to buy a new ADSL modem if my new ISP uses
the standard modem-as-router method of connecting instead of my old
ISP's PPP-over-ADSL method of connecting? The new ISP wants to sell me
a D-Link DLK-DSL-300T, and has no idea whether my old modem is
compatible. The ISP is unwilling to bother to test my modem on their
equipment prior to my scheduled service installation date, and is
unwilling to bother to bring along a D-Link to sell me on the
installation date in case my Sagem is discovered to be incompatible, so
in that case I would have to wait another 2-3 weeks to schedule another
installation attempt.
So if anybody here can answer the compatibility question in advance,
it'd be much appreciated.
All dsl modems (that I'm familiar with*) are (to some extent) routers. |
Whether pppoe is done by the modem or on the computer doesn't matter.
This may help: the Speedstream 5100b/4100 both have ppp clients built in.
If a router is used with one of these modems, the recommended process is to
set "PPP on Computer" and let the router do the authentication.
Another issue to consider is PPPoA instead of PPPoE.
*Exception to the rule: TI1000, an internal dsl modem once shipped inside
Compaq computers to SBC customers. |
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Press2Esc
Guest
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| Posted:
Sat Aug 06, 2005 10:20 pm Post subject:
Re: router-modems vs. non-router-modems |
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andrew,
given enough time, brain food, data & aggravation, and an industr
complaint modem, you should be able to get the system to "work"... fo
example, as an experienced engineer, i could probably make it work, bu
if a modem from the ISP is free to $100... if have to wonder why anyon
chose to a get a root canal just to be able to eat ice cream? jus
food for thought.
P2E
andrewspencers@yahoo.com Wrote:
| Quote: | I've had SDSL, ADSL, and cable modem service, all with which the modem
seems to act as a router: it connects to the phone line (or cable) on
one end, and has an ethernet jack on the other end, and my computer
acquires an IP address via DHCP. Whether the modem is just forwarding
ethernet packets between my computer and a computer at the CO, or
whether the modem is decoding the ethernet packets from my compute
and
forwarding just the IP packets to the CO, my computer neither know
nor
cares.
However, I recently (April 2005) got an ADSL connection with which my
computer connected to the modem via ethernet, as usual, but then had a
PPP connection over the ADSL connection to the CO, in the same wa
that
computers normally use PPP connections over dialup connections with
standard modems which are connected via a serial port. For this, I was
required to install a special driver so that my computer could talk to
the ADSL modem, since my OS (Windows 2000) includes drivers just for
standard dialup modems, not for ADSL modems, and presumably ADS
modems
speak a different language than dialup modems, though I don't see why
this is necessary.
My question is: since I still have that ADSL modem (a Sagem F@ST
908-E2T, and that's not a typo), but am moving and will be connecting
to a new ISP, will I have to buy a new ADSL modem if my new ISP uses
the standard modem-as-router method of connecting instead of my old
ISP's PPP-over-ADSL method of connecting? The new ISP wants to sell me
a D-Link DLK-DSL-300T, and has no idea whether my old modem is
compatible. The ISP is unwilling to bother to test my modem on their
equipment prior to my scheduled service installation date, and is
unwilling to bother to bring along a D-Link to sell me on the
installation date in case my Sagem is discovered to be incompatible
so
in that case I would have to wait another 2-3 weeks to schedul
another
installation attempt.
So if anybody here can answer the compatibility question in advance,
it'd be much appreciated
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