[asterisk-users] revesecharge and asterisk 11

[Ethy H. Brito]

Hi All

I installing a new S.O. (Ubuntu 14.04) and upgrading my asterisk 1.8. to
Asterisk 11

Asterisk 11 is not in production right now but is scheduled to be soon.

From its logs (Asterisk 11) I read a lots of:

[Jul 11 12:07:45] WARNING[24074][C-00000000] func_channel.c: Unknown or
unavailable item requested: 'reversecharge'

One of the lines triggering the warning at extensions.conf is:
exten => s,n,ExecIf($['${CHANNEL(reversecharge)}' = '1']?Set(COLLECT_CALL=1))

https://wiki.asterisk.org/wiki/display/AST/Asterisk+11+Function_CHANNEL says
that nothing has changed from 1.8 to 11.

What am I doing wrong? Why 'reversecharge' is an unavailable item now?
Some missing library/package?

Regards

Ethy