• 16*E1s • 2U chassis • SIP, PRI/SS7 G.711A/U,G.723.1,G.729A/B, iLBC,AMR SDH STM-1 155M interface • 1+1 Redundant power supplies • 32*E1s • 2U chassis • SIP, PRI/SS7 G.711A/U,G.723.1,G.729A/B, iLBC,AMR SDH STM-1 155M interface • 1+1 Redundant power supplies • 48*E1s • 2U chassis • SIP, PRI/SS7 G.711A/U,G.723.1,G.729A/B, iLBC,AMR SDH STM-1 155M interface • 1+1 Redundant power supplies • 63*E1s • 2U chassis • SIP, PRI/SS7 G.711A/U,G.723.1,G.729A/B, iLBC,AMR SDH STM-1 155M interface (63*E1) • up to 1890 concurrent calls • 1+1 Redundant power supplies •