"Andy Burns" wrote in message
o.uk...
tony sayer wrote:

dennis@home scribeth thus

"Graham." wrote:

Why else would this piece of 1970s communications equipment be in the
JPL mission control this morning?
http://www.flickr.com/photos/g3zvt/7...ream/lightbox/

On a serious note, its because the VoIP stuff is cr@p and unreliable so
they
have at least one phone that will work in an emergency.

More Den bull ..

Indeed, I'm aware of multiple emergency service control rooms that are
planning to take all their 999 calls as SIP on one of many VLANs over
gigabit Ethernet.

Well I'm aware that BT CN21 uses VoIP too.
However its not the cr@p VoIP that you get from SIP servers.
Its based on the stuff I worked on.
If they go to SIP people will die.

You need rather a lot of stuff to keep working in an emergency when you are
using VoIP, far more than with the telephone system.