Re: [WG-BB] Study Report: CATV assignment guidline

[Yoshihiro Obata <obata@eaccess.net>]

At 18:47 02/02/07 +0900, Hiroyuki ASHIDA wrote:

> > They say it is 1,500 to 2,000.  I also want the input from
> > Operators themselves, please.
>
>I think they said that number supposing DOCSIS system. DOCSIS system
>currently have been installed in almost operators. It usually has been
>operating on 64QAM, 30Mbps per one downstream port.
>
>  DOCSIS: Data Over Cable Service Interface Specification
>          => current standard of cable data communication system
>
>          Since there price are very low by the effect of
>          standardization, the operators of many countries have
>          also installed them as new facilities.
>
>DOCSIS CMTS of Cisco ( 85% current marcket share ) are equipped
>with multiple ($B!A(B16 max) downstream ports per one chassis.
>Therefore, one CMTS connects much more terminal modems.


Please clarify.  One downstream port = 30MBPS = 1500 - 2000 users.  Is this 
correct.  Or one CMTS = multiple 30Mbps = 1500 - 2000 users.

Yoshi

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