or other labor disputes, riots, civil disturbances, actions or inactions of governmental authorities or suppliers, epidemics, war, embargoes, were weather, fire, earthquakes, acts god, acts of the public enemy or nuclear disasters; provided, that for the duration of such force majeure the party charged with such default must continue to use all reasonable efforts to overcome such force majeure. 15.10 Entire Agreement. The terms and conditions contained in this Agreement constitute the entire agreement between the parties and supersede all previous agreements and understandings, whether oral or written, between the parties hereto with respect to the subject matter hereof. IN WITNESS WHEREOF, the parties hereto have caused this agreement to be signed by duly authorized officers or representatives as of the date first above written. "LICENSEE" D2 TECHNOLOGIES, INC. - --------------------------------- ----------------------------------- BY: /s/ Dick Swee BY: /s/ David Y. Wong ----------------------------- ------------------------------- Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 18 PRINT NAME: Dick Swee PRINT NAME: David Y. Wong --------------------- ----------------------- TITLE: VP Engineering TITLE: President -------------------------- ------------------------------ Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 19 EXHIBIT A LICENSED TECHNOLOGY SPECIFICATION Basic Services: The Basics Services algorithm group shall include the following list of standard D2 products with LICENSEE required modifications as specified in the attached Specification and the Contract for Products and Services, dated August 6, 1997: DTMF Detection and Removal Algorithm 5007-54A Universal Tone Detection Algorithm 50030-54A Multifrequency Tone Detection Algorithm 50028-54A Tone Generation Algorithm 50015-54A Voice Activity Detection and AGC 50013-54A Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 20 Exhibit A continued. Detailed Signal Processing Algorithm Specification A.1 HDLC Communications Not included as Licensed Technology. A.2 Voice Activity Detection Voice Activity Detection (VAD) detects voice activity, adapts to background ambient or