Each CCU is provided as follows:
- Quality, lockable metal enclosure
- Backplate with standardised layout of all related control equipment
- Fused Spur for power input
- Power Supply for providing GDX system power
- Battery Charging unit for battery charging and enabling battery power to be used for the system in the event of a power failure
- Audio Line card for centralised call management and directly terminating lines and entrance panels (when a System Expansion Unit is not being used)
- Space for an optional PAC 212/511/512 Access Controller when enhanced access control is required