Wikipedia
Empirix
Empirix Inc. is a privately held company which designs and manufactures service assurance testing and monitoring equipment for IP-based communications networks such as Voice-over-Internet-Protocol ( VoIP), IP Multimedia Subsystem (IMS)-based, next generation network and 4G wireless networks. Empirix offers enterprise and carrier grade products as well as quality assurance products for network equipment manufacturers. Empirix is headquartered in Billerica, MA.