[Ukfreebsd] Internal ADSL2 Card
stefan.bethke at hanse.de
Wed Jan 28 15:52:48 GMT 2009
Am 28.01.2009 um 16:22 schrieb Bruce M Simpson:
> O'Connor, Kevin wrote:
>> I suppose I could always pull my finger out and write a driver for
>> of the common chipsets.
> Welcome to a bucket of dildoes.
> The ITU has pretty much mandated the existence of ATM forevermore
> in the form of G.DMT-lite, and this was reflected in BT's IPStream
> network offering being ATM based at the point of delivery. I don't
> know if this is the case for ADSL2+ still.
I believe so. However, VDSL2 supports a new mode:
> Packet Transfer Mode – Transmission Convergence PTM-TC In addition
> to classical ATM transport, VDSL2 supports the transport of packet-
> based services (e.g. Ethernet packets, IP packets, etc.) In
> particular, VDSL2 specifies a Packet Transfer Mode – Transmission
> Convergence (PTM-TC) function that is based on the Ethernet in the
> First Mile (EFM) IEEE802.3ah standard.operating in an ADSL2/2+ mode.
Deutsche Telekom's VDSL2 network AFAIK is using this end-to-end
ethernet mode; the outdoor DSLAMs are backhauled over 1GBps or 10GBps
I personally feel that the usual external ADSL2 modems with PPPoE
bridge support are "good enough", and adding additional support on a
lower level is mostly not worth it (from a general consumer
standpoint, not as an embedded systems vendor). I think the situation
here is similar to what we've seen with ISDN support about 5 years
back: nobody really cares enough to make it work and continue to
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