[asterisk-users] [1.4] Call progress for Zaptel 1.4.3.1?

[Gilles]

On Wed, 02 Mar 2011 15:03:46 +0100, Gilles <codecomplete at free.fr>
wrote:
>Does someone know if it's OK to use all those for a TDM with an FXO
>module, or should only some be used together?

In addition, based on people's experience, is CHANNEL() reliable to
detect call progress?

;Down, Rsrvd, OffHook, Dialing, Ring, Ringing, Up, Busy, Dialing
Offhook, Pre-ring, Unknown

;diff between OffHook and Up?

exten => start,n,While($["${CHANNEL(state)}" != "Up" & ${INDEX} < 10])

Thank you.