... and data protocols, including both RBS and Primary Rate ISDN (PRI) protocol families for voice and PPP, Cisco HDLC, and Frame ... and data transmission over T1, E1, and Primary Rate ISDN (PRI) connections. A low profile, half-length PCI form factor ... T1 interfaces ( E1/T1 selectable) -PCI 3.3V interfaceFeatures:One PRI port 30 channels Hardware DTMF detectionConference BridgePCM bus connectors (PCM30 ...