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AVN-TB20AD 20 Button Advanced Talkback Intercom, AoIP Desktop Portal

Audio signal processing, routing and infrastructure

The AVN-TB20AD is a desktop version of the rackmount AVN-TB20AR intercom with a smaller form factor and an elegant sloped front. It has the same feature set and connectivity (except for an additional headset connector on the rear of the AVN-TB20AR).


• 20 illuminated key-cap Talk buttons plus Listen & Page buttons.

• Phone button for remote dialling and control of an external telephone hybrid.

• Page button and Group Talk facilities.

• Callback button with callback source display.

• Three user definable buttons.

• Speaker & microphone mute buttons.

• Mic & headset inputs, headphone & speaker outputs.

• Front panel volume control which operates on speaker/headphone outputs and incoming source levels.

• +48V phantom power for the mic inputs.

• Ethernet webserver and front panel control & configuration.

• Front panel display providing source & destination information.

• Sources from AoIP, 1 x balanced, 2 x unbalanced or S/PDIF digital inputs.

• Destinations to AoIP or rear panel balanced & unbalanced outputs.

• Advanced echo cancellation & mic AGC to prevent acoustic feedback.

• Dual 1Gb lan ports & 1Gb SFP fibre port.

• 10 user assignable GPIO ports.

• GPIO button for triggering external events, via physical GPIO or network commands.

• Front panel LEDs for network audio presence, Talk activity, AGC activity, clock sync and power supply activity.

• Two front panel monitor buttons for routing audio directly to the speaker e.g. to take an IFB feed or off-air transmission signal.

• Ducking or mixing of inputs to speaker/headphones.

• Dual AC & DC power supply inputs.

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