Muni fiber: L1 or L2?

Wed Feb 6 00:41:42 UTC 2013

Eric Wieling wrote:

> In the past the ISP simply needed a nice big ATM pipe to the
> ILEC for DSL service.   The ILEC provided a PVC from the
> customer endpoint to the ISP.  As understand it this is no
> longer the case, but only because of non-technical issues.

The non-technical issue is *COST*!!!!!

No one considered to use so expensive ATM as L2 for DSL unbundling,
at least in Japan, which made DSL in Japan quite inexpensive.

> We currently use XO, Covad, etc to connect to the customer
> We get a fiber connection to them and the provide use L2
> connectivity to the custom endpoint using an Ethernet VLAN,
> Frame Relay PVC, etc complete with QoS.   I assume XO,
> etc use UNE access to the local loop.   There is no reason
> a Muni can't do something similar.

Muni can. However, there is no reason Muni can't offer L1
unbundling.

						Masataka Ohta