[cisco-voip] Gai-tronics RedAlert callbox analog with ATA-187 ?

[Jason Aarons (AM)]

FXS in general has a lack of Supervisory Disconnect, that said has anyone gotten a Gai-troncis RedAlert 393XX callbox to work with an ATA-187 registered to CallManager?

Problem is you press the callbox button, the public safety answers and tells you help is on the way.  Public Safety hangs up and the callbox blairs out re-order tone for 3-4 minutes. (You may recall a home phone left offhook will play a loud re-order tone if you don't hang it up due to lack of Supervisory Disconnect).

I found the ATA-187 parameter Reorder Delay = Never turns off the sounds, but doesn't really hang up the phone.  The ATA-187 has polarity reversal, does this work with Gai-troncis callboxes?

In short can anyone say they have had success getting the Gai-tronics to work with the ATA-187?  Maybe there are some settings in the Gai-troncs device?
Page 36 doesn't get me much to work with  http://www.gai-tronics.com/manuals/42004-438i.pdf

I'm thinking the VG-2XX is the better way to go as it has more Supervisory Disconnect options, but I can't guarantee that will work without testing it.
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