Conceptronic 128 KBPS (2X64 KBPS) USB I ISDN access device
Conceptronic 128 KBPS (2X64 KBPS) USB I. Data link protocols: X.75. V120. HDLC. PPP, Networking features: DSS1:Euro-ISDN. AT&T 5ESS Custom. Modem speed: 128 Kbit/s