Intercom, door entry and commercial AV basics
Installing door entry and small commercial AV systems that work and can be supported: 2-wire and IP (SIP) intercoms, door station placement and accessibility, releasing doors through access control, AV signal flow, HDMI and HDBaseT distances, EDID and HDCP, mounting displays to structure, 70 V distributed speakers and tap maths, microphones, labeling and handover.
- Level
- Beginner
- Length
- About 65 minutes
- Contents
- 4 lessons · 1 video · final exam
- Status
- Published · updated 2 Oct 2026
Skills you'll practise
- Compare 2-wire and IP (SIP) intercom systems and choose cabling and power for each
- Place a door station within the design's reach and visibility requirements and connect its door release through the access control system
- Trace an AV signal path and identify segments that exceed their distance or compatibility limits
- Calculate the load on a 70 V amplifier channel from speaker tap settings and check it against the amplifier rating
- Hand over a room with labeled cables, a signal-flow drawing and tested functions
Course outline
- 1.Intercom, door entry and commercial AV basicsVideo · 3 min
- 2.Intercom and door entry systemsLesson · 16 min
- 3.Releasing doors the right wayLesson · 14 min
- 4.AV signal flow, distance and compatibilityLesson · 18 min
- 5.Speakers, microphones, mounting and handoverLesson · 17 min
- 6.Intercom, door entry and commercial AV basics: knowledge checkKnowledge check · 23 questions
- 7.Final exam10 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- HDBaseT Alliance: What is HDBaseT (uncompressed A/V, USB, Ethernet, control and power up to 100 m / 328 ft over category cable)
- Rane Note 136: Constant-voltage audio distribution systems: 25, 70.7 and 100 volts (taps, amplifier sizing at 1.5 × the sum of the taps, why 70.7 V)
- Digital Content Protection LLC: HDCP (High-bandwidth Digital Content Protection)
- US Access Board: ADA Accessibility Standards, 308 Reach ranges and 309 Operable parts (US example; follow local accessibility rules)
See it with your own jobs and topics
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