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Uros Djokic wrote:
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<pre>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.--
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<br>
I am using tdm400 card with one fxo port. I am using analog line so I
guess it's POTS <br>
"analog cooper fed" line. So it is impossible to distinguish ringing
from talking and billsec <br>
must start when ringing begin due missing answer supervision from telco
? <br>
<br>
Thanks for reply <br>
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Answer supervision is missing in one sense. It was never part of the
spec for this type of telco line.<br>
<br>
You will have to forgive calls under x number of seconds in duration as
if they never occured or get a different type of connection from your
telco that will include answer supervision.<br>
<br>
Lyle Giese<br>
LCR Computer Services, Inc.<br>
<br>
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