... thirsty services such as voice servicesSupport EPON/GPON interface cardsCopper cableSupport for various interfaces, including xDSL ... party communication, IVR automatic connection, ring-back-tone, parallel ringing, sequential ringing, one number link you ( ... supports various interface cards, including Ethernet interface cards, E1/T1/PRI/VE1 interface cards, synchronous/asynchronous interface cards, ADSL2 ...