[Cerowrt-devel] CeroWRT and "FTTN" 50/10 VDSL2 (aka "FIBE")

Michael Richardson mcr at sandelman.ca
Wed Jul 2 16:45:49 EDT 2014

Sebastian Moeller <moeller0 at gmx.de> wrote:
    > Hi Michael,

    > On Jun 30, 2014, at 17:37 , Michael Richardson <mcr at sandelman.ca> wrote:

    >> Sebastian Moeller <moeller0 at gmx.de> wrote:
    >>>> Bell Canada and nortel ATM equipment is involved.
    >>> Oh, that would be quite interesting vdsl2 and atm at the same
    >>> time. Could you by chance post the status page of your vdsl modem (the
    >>> more detailed the statistics the better)? (Typically vdsl2 should use
    >>> packet transfer mode (PTM) instead of ATM between modem and DSLAM,
    >>> though the DSLAM might still connected to an ATM fabric. It would be
    >>> interesting to measure whether you still "see" the effects of ATM
    >>> encapsulation along your link.
    >> I can't say what the VDSL2 interface is, but the backhaul network with Bell
    >> has been historically all nortel passport ATM (with way over buffered LANE).

    > I would be amazed if they would manage to extend the reach of their ATM
    > network while most other telco's seem to be moving away from ATM… Since
    > bell advertises this as a fiber to the cabinet product, my bet is on

OC192 still counts as fiber :-)
Bell Canada is still very much a Nortel captured company.

    > ethernet over fiber from the slam/msan to the core network, but I
    > digress. Not that it matters, only for the modem slam connection one
    > needs to take ATM encapsulation into account for bandwidth shaping
    > purposes. So what is your direct uplink to the slam using PTM or ATM?

I have no idea and no real way to find out. I'll ask my ISP.

]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     mcr at sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [

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