> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces.md).

# Facility management interfaces

Connect Command Centre with building systems, bookings, and server-to-server synchronization.

Use these interfaces to connect Command Centre with building systems and external data sources.

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>BACnet - Overview</strong></td><td></td><td></td><td><a href="/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/bacnet-overview.md">BACnet - overview</a></td></tr><tr><td><strong>Booking Interface</strong></td><td></td><td></td><td><a href="/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/booking-interface.md">Booking Interface</a></td></tr><tr><td><strong>Cardholder Count Outputs</strong></td><td></td><td></td><td><a href="/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/cardholder-count-outputs.md">Cardholder count outputs</a></td></tr><tr><td><strong>Cardholder Sync</strong></td><td></td><td></td><td><a href="/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/cardholder-sync.md">Cardholder sync</a></td></tr><tr><td><strong>Event Sync</strong></td><td></td><td></td><td><a href="/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/event-sync.md">Event sync</a></td></tr></tbody></table>


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