Satellite IP

Jay Ashworth jra at
Mon Jan 10 13:35:54 CST 2011

----- Original Message -----
> From: "Valdis Kletnieks" <Valdis.Kletnieks at>

> So what you're saying is that after a Kyoto/Chile sized quake, or a
> Katrina, or a Quebec 1990 ice storm, you can *guarantee* that you can 
> still fill all requests for transponder space, and *still* satisfy every
> single customer who wants to book 4 hours on Thursday on short notice.
> Like I said - 98% is easy. 100% is hard.


But 100% is also your strawman, I believe; no?

Particularly in the specific space we're presently talking about: 
iDirect Satellite IP service over transponders dedicated to the 
hub operator, the service is a bit more elastic than I believe you 

*Most* iDirect customers are sharing a carrier; it's a TDMA service.

It's only the fairly rare ones, like I may be, who actually want a
"1:1" or uncontended carrier all to ourselves.  Depending on your
spectrum management practices as a hub operator, if you have an entire 
36MHz Ku band transponder -- or better, 2 on the same bird -- with which 
to play, you may be able to carve out 3MHz worth of free space, without
*anyone* getting knocked off line.

The 1000 other clients who are contending for that 72MHz of space merely
have to contend a very small amount harder.

So in actual fact, it may be possible to both meet your SLA's to the 
contention customers and *still* give an occasional customer 100%
uncontended bandwidth for a short period of time; it's one of the 
reasons I propose to go that way: it *increases* my odds of getting
a clean slot from at least one of 3 hub providers at any given 

-- jra

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