Extension of the TAPI function for connecting approved CSTA-based software, e.g. Aurenz (supports user-related basic functions), in conjunction with PBX version 3.4b or >. Specific adaptation to AGFEO systems is usually necessary on the part of the respective software manufacturer. Activation is for the entire system and is valid for a maximum of 1 year (365 days). A possible function requires activated TAPI licenses per user!