[asterisk-users] Billing pulses

[David Boyd]

On Wed, 2007-02-07 at 10:14 -0800, Yuan LIU wrote:
> From:  Jorge Mendoza <mendoza at tcc.com.pe>
> >Funny that a digital line have a analogue pulse.
> >Normally the billing pulse is used on payphones. IMO you only need 
> >the answer supervision to trigger your own billing system.
> >
> >Jorge Mendoza
> >
> >Stefano Corsi wrote:
> >>Hello,
> >>
> >>I've discovered that in Italy ISDN lines can be programmed to 
> >>generate a "billing pulse" every n seconds (it dipends from the 
> >>pricebook). The pulse has these figures:
> 
> 
> Whatever reason, if telco provides them, there's a good chance
> that some ISDN interface cards can use them.  (Just googled to confirm
> that some non-Digium cards can be used in Asterisk.)  This doesn't
> mean that Asterisk can use them.  So you may need significant
> programming to get going.
> 
> If they are truly analogue pulses, it could be cheaper to produce a
> little dedicated circuit to feed an AGI or something.
> 
> 
> Yuan Liu
> 
> >>frequency 
> >>.................................................................... 
> >>12 kHz ?1%
> >>
> >>level 
> >>.......................................................................... 
> >>200 mVrms on 200
> >>
> >>distortion................................................................... 
> >>< 5%
> >>pulse duration 
> >>.............................................................125 ?
> >>25 ms
> >>pause duration 
> >>................................................................> 
> >>180 ms
> >>period 
> >>.......................................................................> 
> >>300 ms
> >>
> >>Does someone know if these values can be used somehow to get an 
> >>accurate billing using asterisk with these lines? Could be a matter 
> >>of configuration or programming?
> >>
> >>Thanks
> >>Stefano
> 
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How would you be able to determine which call was being billed for if
the pulse is sent down the wire on an ISDN circuit with multiple
channels in use?

db