The document introduces the ETERNITY line of IP-PBX systems from Matrix, including the ETERNITY ME10S and ME16S models. The ETERNITY systems provide a flexible IP-PBX platform with universal connectivity and scalability up to 516 user ports. They support a wide range of interfaces including analog, digital, VoIP and mobile trunks as well as digital key phones and IP phones. The modular design allows configuration using interchangeable interface cards.