[clug] [OT] Broadband clangers

[steve jenkin]

Alex Satrapa wrote on 12/08/10 10:40 AM:

>> Layer 1 also needs to be technology-agile, in my opinion. People are
>> going to still want to use their 3G/4G/5G device or Wifi-hotspot to
>> access the same net-enabled services.

They'll keep developing as now.

> 
> Standards
> =========
> 
> Did you know that when you move house, you can take your existing phone with you and plug it in...
> Did you know that when you move house, you can take your existing electrical appliances with you and plug them in...
> Did you know that when you move house, you CAN NOT take your existing Internet equipment with you and just plug it in...
<snip> on consistent last mile.


A great exposition. Thanks.


> Bandwidth
> =========
> 
> Of course when it comes to bandwidth, it's important to remember that 100Mbps isn't just about shifting 100 million bits of data per second, it's also about shifting that 800-byte packet ten times faster than you can on a 10Mbps network. Voice and video both require high speed, low latency networks.

Ummmm...
There are some serious assumptions in there.

 Very few people are going to get *symmetric* 100Mbps services.
 Telcos still think of massive centralised infrastructure.
 From what I've read, they're mostly implementing
  Passive Optical systems. More like cable-TV than LAN's.
 A single common 100Mbps downstream feed, with some sort of
  multiplexer to combine up-stream "bursts".
 Think mobile-phone architecture, but more limited.
 20-50 people share a single fibre.

The advantages for Telco's are *control* and connectivity.
The system and components are 'carrier-grade', ie. really high priced,
and not available to the general public.
System upgrade to higher rates is enormously expensive.
Plus those CPE transmitters are not commodity off-the-shelf. Very
special, very expensive.

I think it's actually cheaper and better to build commodity hardware
LAN's (like COTS), but I'm not in a position of influence...


> If you can't see the future need for 100Mbps in the future, I suggest you've been drinking the Liberal's Kool-Aid.

Great line.

> 
> Alex
> 


-- 
Steve Jenkin, Info Tech, Systems and Design Specialist.
0412 786 915 (+61 412 786 915)
PO Box 48, Kippax ACT 2615, AUSTRALIA

sjenkin at canb.auug.org.au http://members.tip.net.au/~sjenkin