[asterisk-users] sip to dahdi and billsec

[Uros Djokic]

It entirely depends on the technology used to interface to the PSTN.
> You have not specified what technology/hardware you are using to connect
> to the PSTN.
>
> For instance if you are using POTS(plain old telephone service - analog
> copper fed lines), you do not get answer supervision back from the telco.--
>
>
I am using tdm400 card with one fxo port. I am using analog line so I guess
it's POTS
"analog cooper fed" line. So it is impossible to distinguish ringing from
talking and billsec
must start when ringing begin due missing answer supervision from telco ?

Thanks for reply

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