Recording of Extensions for Outgoing calls

You want to record all outgoing traffic done by some extensions - not all extensions (it would be trivial) but just some of your choosing. You also want to be able to turn recordings on or off without modifying the dialplan.

How to do it
We will use Asterisk's internal database to record a flag for each extension that tells us whether to record those calls or not. We add a check for this flag before dialling out, so we can catch all outgoing traffic.

Modifying the dialplan
Whenever you are currently dialing out (we assume that any number starting with 0 is an external call) you add the following piece of dialplan:

exten => _0.,1,NoOP,Dial out with hidden CLID

exten => _0.,2,SetCallerPres(prohib)

exten => _0.,3,DBGet(rec=registra/${CALLERIDNUM})

exten => _0.,4,GotoIf($[ ${rec} = 1 ]?10:20)

exten => _0.,10,MixMonitor(REC-${CALLERIDNUM}-${UNIQUEID}.wav|b|)

exten => _0.,11,Goto(20)

exten => _0.,20,Dial(Zap/g1/${EXTEN:1})

Deciding which extensions will be recorded
Once your piece of dialplan is in place, you use the following command from the Asterisk CLI to tell Asterisk an extension is to be recorded:

database put registra 299 1

While you use the following to tell Asterisk an extension is not to be recorded anymore:

database put registra 299 0

If you want to know the status of your recorded extension, you type:

ast*CLI> database show registra

/registra/223 : 1

/registra/224 : 0

/registra/299 : 1

Any key that has value of 1 will be recorded; any other key (whether it has value 0 or does not exist) is not recorded.

Finding recorded calls
You can find the recorded calls by issuing the following command:

[root@ast monitor]# ls -l /var/spool/asterisk/monitor/REC*

-rw-r--r-- 1 root root 186284 Jun 9 15:36 /var/spool/asterisk/monitor/REC-299-1186583777.73726.wav

-rw-r--r-- 1 root root 206764 Jun 9 15:40 /var/spool/asterisk/monitor/REC-299-1186584038.73774.wav

And you can listen to them by copying them over to any audio software.