[asterisk-dev] On hook reversals

[Steve Underwood]

Hi all,

In the Zaptel code, the ZT_SETREVERSAL command tries to prevent 
reversals from being set while the loop is open. This test seems to fail 
under some circumstances, as I have had the driver in a state where 
reversals work just fine while the loop is open. I'm not clear what gets 
the driver in that state. However, my actual problem is I really need to 
generate reversals when the loop is open. Some of the caller ID specs 
require this. Can anyone tell me why these reversals are prevented, when 
it seems the hardware is quite happy to perform an on-hook reversal?

Steve