1-port E1/T1 Port Voice and Data Card 30 simultane...
2-port E1/T1 Port Voice and Data Card 60 simultane...
4-port E1/T1 Port Voice and Data Card 120 simultan...
8-port E1/T1 Port Voice and Data Card 240 simultan...
16-port E1/T1 Port Voice and Data Card 480 simulta...