7470 STM4-2 IR The STM4-2 ATM IR Card is a UNI/NNI STM4 ATM interface card operating at the SONET STM4 rate of 622 Mbps, with 32k egress cell buffering management capability. The Intermediate Reach(IR) single mode fiber optical interface has a total loss

7470 STM4-2 IR The STM4-2 ATM IR Card is a UNI/NNI STM4 ATM interface card operating at the SONET STM4 rate of 622 Mbps, with 32k egress cell buffering management capability. The Intermediate Reach(IR) single mode fiber optical interface has a total loss budget of 12 db. The STM4-2 employs the CPU-2 module for enhanced call performance. The STM4-2 requires a minimum of release 4.2 for operational support.