With over 7000 postings all time top poster in the TAPI newsgroup for years. Since 2003 repeatedly awarded as Microsoft MVP for this contribution.

Since 1996 working as freelance consultant for Siemens AG in the section Private Communications (PN), later Information and Communication Networks (ICN) in the fields of development, test and certification of plus products especially TAPI Service Provider (TSP) for Hicom 100E, 150E/H and HiPath 3000, as well as Level-3-Support for HiPath Ready Program for the Open Interfaces TAPI and CSTA

I-B-A-M® offers development and consulting in the field of CTI (Computer Telephony Integration): Especially for the CTI protocols TAPI (MS Telephony API) and CSTA (Computer Supported Telecommunications Applications). A specialty is the field of TAPI Service Provider (TSP). The business was established in 1996 and is active in TSP development since 1997. Since 2003 business founder Dipl.-Ing. (= MSE) Andreas Marschall has been repeatedly awarded as Microsoft MVP (Most Valuable Professional) for his contributions in the TAPI newsgroups.