[asterisk-users] Understanding Congestion to incoming caller

[Michelle Dupuis]

I have an * installation which will refuse incoming callers once a max (5
callers) is reached.  Caller 6 and up should be notified of
congestion...without network load on my trunk.  How would I do this?
 
The voipinfo wiki shows playing a congestion tone to the caller, but that
seems stupid since I'm consuming bandwidth to send a tone.
 
I also tried just responding with the congestion command, but the 6th+ call
just hears a hangup when calling in.
 
Can someone explain how this should be done?
 
Thanks,
MD
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