An ISDN network termination device that terminates an ISDN BRI U-interface and provides V.35 and EIA-530/232 DTE serial interfaces. Provides for dial-up or leased line access Synchronous DTE rates from 2400 bps to 128 kbps Asynchronous DTE rates from 300 bps to 115.2 kbps Dialing via front panel, stored numbers, DTR assertion, AT commands, V.25 bis, or RS-366 Multilink PPP or BONDING protocols for aggregating 64 kbps B-Channels Remote configuration over the ISDN line Switch type support includes National ISDN-1, Lucent 5ESS, Nortel DMS-100, and NEC