Many integrators cannot tell a real manufacturer from an agent or a relabel trader when first buying a digital conference system. Here is a four-step screening method. Step 1: Confirm it is a real factory. Ask for factory video, production-line photos and business-license scope; suppliers that issue VAT invoices and welcome on-site audits are usually real factories. Pure traders only share catalogs with vague lead times. Step 2: Check certifications. Exports need at least CE and RoHS; microphones/power supplies need FCC; domestic projects need ISO9001 and 3C. Avoid suppliers claiming “export-ready” with no certifications. Step 3: Test OEM/ODM flexibility. Ask whether they can change silkscreen, mechanics, firmware and packaging. A real factory delivers an engineering sample in 2–4 weeks; relabel-only suppliers have zero customization. Step 4: Verify delivery and support. Confirm MOQ, mass-production lead time, warranty (prefer >=12 months) and whether English manuals and remote commissioning are provided. Own-brand manufacturers like COUDUS (Tekong) usually supply both Chinese and English docs plus training. Red flags: · Price far below market with no certification — likely refurbished or cloned; · Refusing on-site audit — probably a trader; · Contract without lead-time penalty — high delivery risk; · No English docs — hard for overseas rollout. Screen with these criteria and you will shortlist a reliable digital conference system manufacturer and avoid project failures.