This is an ISDN / dedicated wire access router compatible with Fretz ISDN and a variety of networks. ■ Built-in DSU (U-point, S/T) 1 port each, 10Base-T 4 ports; BRI1 port (dedicated line 64/128 Kbs (DA,HSD), INS-64 line exchange (INS-C)); Analog port (2 ports); IP routing protocol (rip, static) ■ Address conversion (NAT, NAT, NAT+, NAT). ■ Secure Te (caller Number notification, PAP/CHAP, simple fire wall); Call back function (chargeless, CBCP); Fault notification email; ProxyDNS; Multi-routing; Setting/operation (command, web, configuration dial); TA function