[Asterisk-Users] zap to zap bridging not hanging up

[Rajkumar S]

Rich Adamson wrote:
>>The *proper* way to see it is with a voltmeter.  your off-hook voltage should 
>>be between roughly -5 and -15 Volts DC.  CPD should either disconnect the 
>>battery (0V) or reverse the battery (-5-15VDC) briefly upon remote party 
>>hangup.
> 
> 
> Just to add to Andrew's comment above, the majority of US analog pstn
> lines will disconnect battery for about 400 milliseconds. However,
> a fair number of non-US countries either provide no disconnect supervision, 
> or use some other approach (eg, tones).

Thanks for your suggestions. Let me check with my provider if the 
network supports CPD.

raj