We have 2 types of call transfer, under which the call can be lost - blind transfer and semi-attended transfer. If, after transferring the call, the called party does not pick up the phone, "return from transfer" will be executed. If, when the call is returned, the user to whom the call returns is not answered or will be busy/unavailable - the call may be lost. In this case, the transfer of the call to the receptionist can be used.
To transfer call to a receptionist, need to create a context named "receptionist" and specify the destination for the "default" extension.
Limitation:
"Return from transfer" is disabled for pbxes with the country code "USA".