"return to transferee" and "return to operator" in Asterisk

[JPB]

on the Asterisk module:

Does this version of asterisk support the "return to transferee" and then "return to operator" features.
It seem that this feature, which is default for the hardware bases PBX's, is optional patch for asterisk.
Does the Zentyal compile for asterisk include these?

I did not think that anyone can run a PBX without these features.