(Upgradable to 6) LAN Card for VM System for maintenance etc. Battery Back-up (memory) FTC Price Break Down 1 KX-NCP1000 Pure IP Main Unit (3U, Free Slot) $1,747.62 1 KX-TDE0111 64ch volP DSP Card(16-IP Trunk & 32-IP PT Activation Key) $2,334.37 1 KX-NCP1171 8-Digital Extension Card $319.03 1