[Asterisk-Users] Detect Dialtone

[bodra]

i need to know something in the zaptel configuration
as it seems i can configure detecting the busy tone and hangup after number of busy tone counts, that was great but the problem is sometimes the pstn line has no dialtone and when i try to make call it continue dialing while not having a dialtone! while it should say "all lines are busy/congested" how can i configure that??

i already done (immediate=no) and still it opens the zap trunk even when theres no dialtone and shows that "zap/3 answered"

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;Specify whether the channel should be answered immediately or
; if the simple switch should provide dialtone, read digits, etc.
;
immediate=no
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