... ProcessingVoice codec: G.711, G.729A, G.723.1, GSM, iLBCEcho cancellation: G.168, 64ms echo tailDynamic jitter buffer, ... control chassis, 2U, 2 10/100M Base-T, 1 RS232 console, 4 line card slots, AC. With 24 concurrent ... control chassis, 2U, 2 10/100M Base-T, 1 RS232 console, 4 line card slots, AC. With 48 concurrent ... control chassis, 2U, 2 10/100M Base-T, 1 RS232 console, 4 line card slots, AC. With 72 ...