3.4.1. Installation Locations and Cabling

Distribution Frames:

• MDF (Main Distribution Frame): Primary location where external connections (ISP, WAN) enter and core equipment resides
• IDF (Intermediate Distribution Frame): Secondary closets extending connectivity closer to users

Installation Considerations:

• Rack size: Standard is 19" width; height measured in "U" (1U = 1.75")
• Port-side exhaust/intake: Manage airflow; hot-aisle/cold-aisle design prevents recirculation
• Cable management: Patch panels, cable trays, proper labeling
• Physical security: Lockable cabinets for network equipment

Structured Cabling:

• Patch panels: Central termination point for horizontal cabling
• Fiber distribution panels: Organize fiber connections
• Cable runs: Horizontal (to workstations) and backbone/vertical (between floors)