Valcom Expands the V-ACS45 to 48-Zones - Wall Mountable for Emergency - Aluminum AlloyCompact wall mount design 24 Talkback Stations Expandable up to 72 Talkback Stations Dual FXS access Ports SIP accessible (with additional equipment) Dual Auxiliary Audio Inputs Windows based programming and administrative software Up to 1 Hour of custom WAV file storage 3 Programmable Switch Inputs and 4 Programmable Relays 24 Flexible Non Blocking Audio Paging Groups 8 Bell Schedules NTP time updates All speaker and I O terminations may be made