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X.21 interface, opt. 2 x X.21
2 x ISDN BRI interfaces
Ethernet switch with 4+1 ports (autosensing, 10/100 Mbps)
10 IPSec tunnels, opt. max. 110
Stateful Inspection Firewall
Optional X.25
Frame Relay
Multiprotocol router with X.21 and ISDN
bintec R4300
