Re: [EFM] EFM Requirements
It seems to me though that we have missed looking at a very viable
If the PON we are looking at is 16:1 split we are really talking about a
If that is the case, then 1 Gig p2p fiber to an active switch driving
customer copper (HFCu) seems very viable to me given the following sort of
* We seem to be coming to a requirement for an active device at the
customer demarc for isolation plus OA&M.
* A "neighborhood switch" could have reasonable lengths for the copper.
* We could backfeed the power upstream to the switch via a phantom circuit
from the demarc box.
This would restore us to a network topology based on point-to-point links.
This is the configuration that originally got Ethernet to "take off" due to
simplified troubleshooting and failure isolation. If you look back to
coax-based systems for Ethernet, the thing that was hated about them was
doing the multi-point troubleshooting.
Regarding earlier comments on the reflector regarding powered devices in
It has been noted that there are a lot of active/powered devices in the
field for traditional bandwidth systems to providers. Every time the
decision was made to put power in those I am sure that there was a lot of
wishful thinking that they could be deployed without a power supply. This
wish was eventually set aside when it was discovered that there is no such
thing as a free lunch. There are powered devices widely deployed in the
field because the cost/performance/maintenance trade-offs put them there.
| Geoffrey O. Thompson |
| Nortel Networks, Inc. M/S SC5-02 |
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