DComTalk.com

When you have an important connection in videoconference,
and one ISDN broken, you must recall the other system
to restabilish.

Sometime you loose 20 or more seconds.

If your system has the downspeed feature, as the
new Tandberg equipments for instance, you still
have a lower speed connection. But the computer
inside will try to reconnect the broken line ?

If not, you are again forced to recall the other
equipment, loosing connection time.

(Sorry for my bad english)

As I have tested with a Polycom system, the
computer is not programmed to try to restablish
the connection after the failure.

So the downspeed feature is not practically useful.