The Universal Voice Module (UVM) is a high-performance voice module for Cisco IGX 8400 series switches. The UVM is suitable for all enterprise and service provider voice applications and offers toll-quality voice and efficiently utilizes wide-area bandwidth. Bandwidth savings achieved through voice compression and silence suppression can be applied to bursty traffic and a higher number of voice channels per trunk.The UVM uses 16 TMS320 C32 digital signal processors and an MC68302 control processor with advanced software to support the following functions: T1/E1/J1 interfaces; 32-Kbps and 24-Kbps adaptive differential pulse code modulation (ADPCM), 16-Kbps low delay code excited linear prediction (LD-CELP), and 8-Kbps conjugate structure algebraic code excited linear prediction (CS-ACELP) compression; Voice activity detection (VAD); Echo cancellation; Fax relay; Modem detection; Super-rate data connections; Voice switching; D-channel compression; Statistics collection; Standards-based alarm and fault management; Simple Network Management Protocol (SNMP) configuration and access; Redundancy with hot stand by switchover; CAS or CCS signaling.