[Asterisk-Users] Can X100P/X101P detect reversal of line polarity?

[Mikael Magnusson]

On Thu, Jul 08, 2004 at 08:30:59PM +1200, Richard Scobie wrote:
> 
> One thing to watch for here is RX gain if busydetect does not seem to be 
> working after trying all the combinations.
> 
> I had a 2 x X101P setup which busydetected perfectly - TX and RX gains 
> were at the default levels.
> 
> The X101Ps were replaced by a TDM card with 4 x FXO modules and with no 
> config changes, busydetect stopped working. After incrementing in 1dB 
> steps, an RX gain of 3.0 brought back reliable busydetect.
> 
> I look forward to Rich Adamsons forthcoming writeup on setting up the 
> gain distribution in an Asterisk system, to get everything working 
> optimally.
> 

In Sweden we don't get a busy signal when the remote part hangs up.
Instead remote hang up is signaled by reversing the polarity of the line.
Can X100P/X101P detect polarity reversal when off hook, on hook, or both? 

Regards,
Mikael Magnusson