Date   : Thu, 18 Nov 2010 20:27:35 -0000
From   : jumbos.bazzar@... (Mark Haysman)
Subject: [OT] Who'da thought...

----- Original Message ----- 
From: "Rick Murray" <rick@...>
>> Full duplex, though, or bond two channels and get 128Kbps !
>
> aka "pony up twice, b*tch".

ISDN is still in mainstream use for Videoconferencing, and usual systems use 
3 or 4 ISDN2e boxes giving 6 or 8 lines for 384k/512k connection. A lot of 
clients now have PRI links, which are a single RJ45 connection capable of 
having 30 concurrent connections of 64k at once - nice bandwidth, not so 
nice on the bill if you have a 2 hour conference at 1920k to the other side 
of the world!

IP is also used, but going via the public internet you can't guarantee a 
bandwidth, so you get packet loss and the resulting artifacting on screen, 
something you don't get with ISDN (when it's working properly!)

Mark.