DUAL MAU This Dual MAU provides redundancy connectivity between adjacent pairs of redundant IP Services Cards (ISCs). The Dual MAU is mandatory to interconnect two adjacent ISC's running in 1+1 Redundancy mode. If the MAU is missing, the working card beco

DUAL MAU This Dual MAU provides redundancy connectivity between adjacent pairs of redundant IP Services Cards (ISCs). The Dual MAU is mandatory to interconnect two adjacent ISC's running in 1+1 Redundancy mode. If the MAU is missing, the working card becomes active and the secondary ISC card is neither active nor providing redundancy. This Dual MAU is also used for redundant call processing cards on systems running non-integrated control software.