Passive components — racks, cabling, panels, outlets and cable management — are volume categories where consolidated buying across sites produces the clearest commercial gain.
Switches and access points are bought through authorised distribution so warranty, licensing and support remain valid; direct grey-market supply is not recommended and we say so.
Direct manufacturer supply is used where it is genuinely available for the category and volume. Where a brand supplies only through authorised partners, we buy that route to protect warranty and benchmark it so the difference is visible.