Re: [EFM] Service provider OAM for Leased Line services
Roy,
I don't really want to get sucked into this discussion, but I just wanted to make a clarification. You are correct that EFM has chosen to standardize on a PHY for Copper that includes an EOC out-of-band clear channel. I would not go so far as to say, however, that the EOC has been "made available". To this point, the EOC has generally been viewed as being an out-of-scope by-product of the the chosen PHY. I do not think there is interest in exposing or describing EOC usage in 802.3ah.
Of course, individial implementations might get creative. . .
-=Scott
Roy Bynum wrote:
>
> Ben,
>
> In a previous message I made the statement that with the exception of
> the 10GbE WAN PHY, little has changed since I made the presentation 1999
> stating the need for service provider OAM support for "dark fiber" and
> other leased line services. In one respect, that statement is
> incorrect, but not directly because of the 802.3ah TF. The copper sub
> task force, in adopting the ITU defined mapping for xDSL, have made
> available an embedded overhead channel (EOC) that can be used by service
> providers for leased line and other "private" facility services. The
> EOC is similar in usable functionality to other "out-of-band" OAM in the
> data transmission services industry. So within that context, 802.3ah
> has provided an OAM functionality that is useable by service providers
> for services other than "packet", "Frame Relay", or so-called
> "broadband" services, but only on the copper PHY.
>
> Thank you,
> Roy Bynum
>
>