nanog mailing list archives
Re: last mile, regulatory incentives, etc
From: Jimmy Hess <mysidia () gmail com>
Date: Fri, 23 Mar 2012 22:59:23 -0500
2012/3/22 Masataka Ohta <mohta () necom830 hpcl titech ac jp>:
William Herrin wrote:
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.
Hm... i'm thinking one transceiver might malfunction and get stuck/frozen in the "transmitting pulse" state, thus making collision avoidance impossible, kind of like a shorted NIC on a shared bus topology LAN, if just one subscriber's equipment happens to have the right kind of failure, and that's neglecting the possibility of intentional attack. Passive optically-shared fiber networks don't sound so hot in that case.
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.
-- -JH
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) 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)
- Re: Verizon, FiOS, and CLEC/UNE orders (was AT&T diversity) Joe Maimon (Mar 26)