STM4-2 IR R4.3 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

STM4-2 IR R4.3 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 release 4.2 for operational support.