> > Bumping calls to clear a path for 911 is possible within Asteriskalready - see the "SoftHangup" application. That sounds good, but what can trigger the SoftHangup app to drop other calls automatically when 911 is dialed?
A short AGI script, perhaps?
It probably would not even require a short AGI. Define a group of Zap lines as your "emergency lines". Increment a counter every time a line in that group is used for an outbound/inbound call, and decrement when the line is released (hung up.) If a 911 call is placed, and counter=(max lines in group) then run the SoftHangup and hangup the last three or four lines in the group before placing the 911 call. It is hopefully the case that your system sees 911 calls infrequently enough that a few dropped calls will not be overly burdensome. A sub-counter needs to be kept in order to prevent an existing 911 call from being SoftHangup'ed. It is the case that 911 calls come in clusters from office environments, where two or three people may call about the same issue at the same time, and it would be bad form to hang up 911 caller #1 in order to clear the line for 911 caller #2. You simply have to judge how many lines are appropriate
For simplicity's sake, you may just decide that you should hang up Zap/1-21, Zap/1-22, Zap/1-23 anytime you see a 911 call being placed. You risk hanging up on your other 911 callers... but everything is always a tradeoff.
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