A computer module for electrically coupling a motherboard with add-in cards comprises risers connected to the motherboard and oriented facing toward each other, where the risers are connected to the add-in cards at different elevations above the motherboard, so that the add-in cards are parallel to the motherboard and overlap each other. A voice recognition unit performs voice recognition on a user’s articulation in which a character string such as the telephone number \u201c024 636 0123\u201d is entered via a microphone. Interaction of VSPs with a Mobile Positioning Center or a Gateway Mobile Location Center is permitted, as is interaction of wireless carriers with a Voice Positioning Center.