Is it possible to initiate a call from person A to person B without the need to specify the onBehalf parameter from the CallFactory class?
The required behaviour is the start of a call from A to B.

public static Call create(String from, String to, Identity onBehalfOf)

onBehalfOf is a required parameter. It can be the same as the "from" address if desired. In that case, however, you may want to set the cluster attribute called "Default identity for special make call cases". Communication Manager doesn't like it when it sees an extension calling itself. onBehalfOf is the number displayed to both the "from" and the "to" address. If onBehalfOf is the same as the from address, EDP will substitute this default identity on the call to the "from" party.