Asterisk: The Future of Telephony

Call Detail Recording

Without even being told, Asterisk assumes that you want to store CDR information. Quite a smart machine, yes?

By default, Asterisk will create a CSV^[77] file and place it in the folder /var/log/asterisk/cdr-csv/. To the naked eye, this file looks like a bit of a mess. If, however, you separate each line according to the commas, you will find that each line contains information about a particular call, and that the commas separate the following values:

accountcode

Assigned if the application SetAccount() is used, or if configured for the channel in the channel configuration file (i.e., sip.conf). The account code is assigned on a per-channel basis.

src

Received Caller*ID (string, 80 characters).

dst

Destination extension.

dcontext

Destination context.

clid

Caller*ID with text (80 characters).

channel

Channel used (80 characters).

dstchannel

Destination channel, if appropriate (80 characters).

lastapp

Last application, if appropriate (80 characters).

lastdata

Last application data (arguments, 80 characters).

start

Start of call (date/time).

answer

Answer of call (date/time).

end

End of call (date/time).

duration

Total time in system, in seconds (integer), from dial to hangup.

billsec

Total time call is up, in seconds (integer), from answer to hangup.

disposition

What happened to the call (ANSWERED, NO ANSWER, BUSY).

amaflags

What flags to use (DOCUMENTATION, BILL, IGNORE, etc.), specified on a per-channel basis, like accountcode. AMA flags stand for Automated Message Accounting flags, which ...