IP Audio Interface

Combine the Strengths of the IP and the Analogue Audio World
Plug & Receive: Based on open standards, the IP-A1AF Audio Interface plugs right into standard IP networks and can be easily integrated into your video management system (VMS) or SIP-based communication system with a single standard network cable provides both power and connectivity with your network.
The IP-A1AF IP Audio Interface can integrate analogue receiving devices into your network as e.g., conventional low impedance speakers or local PA systems. A wide variety of low impedance speakers like TOA's F-series can therefore be turned into IP speakers. Furthermore, PA or BGM systems without SIP or ONVIF* interface can now be integrated into your network solutions.

Flexible Group Paging: The IP Audio Interface can also be addressed via multicast, enabling audio paging into groups or larger zones of IP audio devices simultaneously.

Application Examples:
Event rooms with high power analogue PA systems can be integrated into VMS or SIP telephone systems. Retail chains with existing local PA/BGM systems can be integrated into IP solutions providing network control and centralized management opportunities.

  • Receive SIP audio, ONVIF* audio backchannel and multicast (up to 20 addresses)
  • Local broadcast using internal audio files or local audio source
  • 1 audio input (LINE/MIC and phantom power selectable)
  • 15 W (PoE+) / 8 W (PoE) built-in amplifier, 1 LINE audio output
  • API (HTTP commands)
  • Audio file storage (20 files, total 80 MB, WAV/ MP3)
  • Different playback programs (repeat, duration, weekly timer)
  • PoE+ / PoE-powered

*ONVIF is a registered trademark of ONVIF Inc.

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  • Specifications
  • Application examples
  • Tender text
  • Downloads
Specifications for product:
Power source

PoE+ (IEEE802.3af Class 4) , PoE (IEEE802.3af Class 3)

Power / current consumption

22 W (at PoE+ powered, rated output)
12.95 W (at PoE powered, rated output)
5 W (IEC62368-1)

Frequency response

50 Hz - 20 kHz

Audio delay time

Min. 100 ms (when using in Local Broadcasting Mode)

Rated output

15 W (at PoE+ powered, 8 Ω)
8 W (at PoE powered, 8 Ω)
Applicable impedance 8 - 16 Ω

Audio Codec

PCMU (G.711u), PCMA (G.711a), G.722

Network audio I/F

SIP Broadcasting/SIP Calling Mode: PCMU/PCMA/G.722, P2P/SIP Server Connection

Multicast Broadcasting Mode: PCMU/PCMA/G.722, Auto codec recognition, 20 ports

VMS Broadcasting Mode: ONVIF Audio Backchannel, PCMU

Note: Each broadcast mode can be assigned an order of priority using the Priority Setting function.

ONVIF is a registered trademark of ONVIF Inc.

Network control I/F

Remote API (HTTP commands)

Network I/F

100BASE-TX, Auto MDI/MDI-X, RJ-45 connector

Network protocol


Internal audio files

Max. 20 messages (Max. recording capacity: 80 MB)

Supported file formats:

    WAV file: 8/16/44.1/48 kHz sampling frequency, 8/16 bit, monaural/stereo

    MP3 file: 32/44.1/48 kHz sampling frequency, 64 - 320 kbps, CBR/VBR, monaural/stereo

Repeat playback: Playcount (1 - 10 times), Duration (5 - 3600 s)
                                or Timer (from start time to end time)

Interval time: 0 - 60 s, Delay time: 0 - 30 s

Trigger: Control Input or Remote API (HTTP)

Other features

Local Broadcasting Mode: Output from LINE/MIC IN to SPEAKER OUT

Clock Accuracy

±13 s per month, Power outage protection period: 24 h (RTC time retention, at 40 °C)

Time Adjustment

Manual time setting, Time adjustment by NTP

Audio input

1 channel, electronically-balanced, 10kΩ
LINE/MIC selectable (Rated input: LINE 0 dBV, MIC: -60 dBV)
PAD function (-20 dBV), Phantom power ON/OFF (12 V DC), volume adjustable
removable terminal block (6 pins)

Audio output

1 channel, electronically-balanced, 600 Ω or less
Rated input: 0 dBV, removable terminal block (6 pins)

Control input

2 channels, no-voltage make contact inputs, open voltage: 5 V DC, short-circuit current: 10 mA or less, removable terminal block (6 pins)

Control output

1 channel, open collector output, withstand voltage: 30 V DC, control current: 10 mA or less, removable terminal block (6 pins)


STATUS (green/blue/orange/red), LINE/MIC IN (green/red), OUTPUT (green), LINK/ACT (green)

Operating temperature.

-30 °C to +55 °C

Operating humidity.

90% RH or less (no condensation)


126 x 33 x 80 mm (W x H x D)


Steel plate, surface-treated, paint, black


Steel plate, black, surface-treated, paint
Steel plate, surface-treated

Accessory (included)

Removable terminal plug (6 pins, preinstalled on the unit) x 2, Removable terminal plug (2 pins, preinstalled on the unit) x 1, Rubber feet x 4, Mounting screw (M3x6) x 4

Application examples
Tender text