Matrix ETERNITY series of products are family of PBXs. This PBX range of products offer interfaces such as IP, GSM/3G, T1/E1 PRI, ISDN BRI, E&M, CO (FXO), Analog Extension (FXS), Digital Extension (DKP), Magneto Phones, IP Extension and Mobile Extension. They come in different foot-prints to match the exact needs of any organization.