... /Voicemail/Conference system based on Asteri 1E1 PRI PCI CARDDescription:u Target applications: ISDN PRI PBX, ISDN least cost router, ... equipment, PBX to PBX trunking.u Scalable: Just add additional cards to extend system.u Features: 1 Primary Rate Interface for CPE ... and NET operation, DTMF detection, PCM bus connectors (PCM30, PCM64, PCM128), PRI ISDN protocol stack.u ...