[Asterisk-Users] can you trust CDR for billing information?

[Jorge Mendoza]

In some (many?) countries, there are analog lines with reversal polarity 
as answer supervision. When the called party hangup the polarity back to 
normal.
In this case analog lines are reliable as digital ones from billing 
point of view.

BTW, reversal polarity is not a obsolete technology. Here in Peru the 
telco has state-of-art digital switching with PRI, BRI and CID and 
reversal polarity for analog lines.

Jorge

Ryan Butler wrote:
> It's an analog device, it is picked up whenever it dials.  It has no
> sense of when a call is answered on the remote end, if you want accurate
> billable seconds you'll need a digital interface like a PRI that can
> tell you whether its ringing, or whether it's been picked up.
> 
> Ryan Butler
> ADI Internet Solutions
> rbutler at adiis.net
> IAXTEL:  1-700-753-8080 x61
> PSTN: 641-753-8080 x61
> 
> 
> On Wed, 2004-07-14 at 11:54, Johannes van Hulst wrote:
> 
>>Is the CDR table the right table for billing?
>>
>>I did some tests and CDR records billing seconds for calls that where
>>never picked up.
>>
>>Is this a bug in my system or is that the way CDR works?
>>
>> 
>>
>>I called out on my X100T card.
>>