nanog mailing list archives
Re: last mile, regulatory incentives, etc
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Fri, 23 Mar 2012 07:15:56 +0900
William Herrin wrote:
PON (e.g. FIOS) is similar to CWDM.
If you are not talking about WDM PON, no, not at all.
The PO in PON is Passive Optical. As in a glass prism-like device with no electronics.
The passive optical device of usual PON is not a prism but a splitter. The entire optics is shared by all the subscribers sharing a fiber. Thus, the problem is collision avoidance of simultaneous transmission, which makes PON time shared with L2 protocols.
So, you share fiber by having one guy control one wavelength (color, e.g. red) and another guy control another wavelength (e.g. blue).
That's not a usual PON but WDN PON.
Or, you could share at a different level: ethernet packets.
That's where usual PON can be shared. But, it costs a lot, as much as sharing at L3. Masataka Ohta
Current thread:
- Re: last mile, regulatory incentives, etc (was: att fiber, et al), (continued)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Joseph Snyder (Mar 24)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Michael Painter (Mar 25)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Keegan Holley (Mar 22)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Jared Mauch (Mar 22)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Keegan Holley (Mar 22)
- RE: last mile, regulatory incentives, etc (was: att fiber, et al) Eric Wieling (Mar 22)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Luke S. Crawford (Mar 22)
- RE: last mile, regulatory incentives, etc (was: att fiber, et al) Frank Bulk (Mar 24)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) 'Luke S. Crawford' (Mar 24)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) William Herrin (Mar 22)
- Re: last mile, regulatory incentives, etc Masataka Ohta (Mar 22)
- Re: last mile, regulatory incentives, etc Jimmy Hess (Mar 23)
- Re: last mile, regulatory incentives, etc Masataka Ohta (Mar 24)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Keegan Holley (Mar 22)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) William Herrin (Mar 22)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Ray Soucy (Mar 26)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) david peahi (Mar 26)
- RE: last mile, regulatory incentives, etc (was: att fiber, et al) Chuck Church (Mar 26)
- Re: last mile, regulatory incentives, etc (was: att fiber, et al) Ray Soucy (Mar 26)
- RE: Verizon, FiOS, and CLEC/UNE orders (was AT&T diversity) Frank Bulk (Mar 24)
- Re: Verizon, FiOS, and CLEC/UNE orders (was AT&T diversity) Owen DeLong (Mar 24)