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Re: [PLUG] Verizon DSL modem/bridge
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On Monday, February 10, 2003, at 08:46 PM, gabriel rosenkoetter wrote:
On Mon, Feb 10, 2003 at 06:07:30PM -0500, William H. Magill wrote:
If the problem is with the DSLAM (Digital Subscriber Loop Access
Module) which is probably what you/they are calling the DSL Bridge,
located in the Central Office, there is no way that you can
communicate
with it. The RBOCs and CLECs jealously guard access to this gear.
All the nasty things you say about DSLAMs is true, but Paul's
talking about the box with the blinky lights in his house. And he's
right, it's not a modem, properly, but a bridge (probably; some SDSL
lines bear full-fledged routers, depending on the protocol that goes
upstream to the DSLAM). It's not doing its own analog signalling,
it's converting between two kind of Ethernet; PPPoE or ATM on one
side and regular 802.3 (or .2, or .11, or whatever) on the other
side.
??? I thought that all ADSL modems were REAL modems -- talking DMT
(Discrete Multitone) with additional features added. DSL actually being
an analog service, not digital like ISDN. That's why the frequency
filters (microfilters) -- voice/fax/classic-modem goes below 3.3k hz.
and data above 35Khz. (We may be saying the same thing here, just using
different points of view.)
Westel apparently does offer a variety of models, from simple dumb
modems, to those which act as bridges, routers or firewalls, depending
upon the software / firmware load.
T.T.F.N.
William H. Magill
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magill@mcgillsociety.org
magill@acm.org
magill@mac.com
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