QUAD STM1 ELEC UNI/NNI clei The quad OC3/STM1 Electrical UNI/NNI Card is a ATM interface card operating at the SONET OC3 rate of 155 Mbps per port. The electrical interface is dual coaxial BNC connectors, with a range of 450 feet. The line code is code ma

QUAD STM1 ELEC UNI/NNI clei The quad OC3/STM1 Electrical UNI/NNI Card is a ATM interface card operating at the SONET OC3 rate of 155 Mbps per port. The electrical interface is dual coaxial BNC connectors, with a range of 450 feet. The line code is code mark inversion (CMI). The quad OC3 card is compliant to the requirements of the ATM Forum UNI Specification (Version 3.1) and the ATM Forum B-ICI Specification (Version 2.0). This card is also supported in ESE R2.0.