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Phoenix MT454-DTI Octopus USB Base Unit with Digital Telephone Interface

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Product Description

The Octopus is an Audio Conferencing Mixer that gives you crystal clear audio. Using the Octopus allows you the freedom to mount microphones and speakers anywhere in the room (ceiling, walls, and table tops) for professional sound and a sleek look. The Octopus has a high powered DSP and technology that automatically monitors and mixes the audio. Although this may sound complicated we designed it for simple set-up & use, giving you a “set it and forget it” solution.

Each Octopus has four microphone inputs (each input can also be designated as a unique auxiliary or sound reinforcement channel), however, the Octopus provides unlimited daisy chain capability, and allows for multiple connectivity options. It comes standard with USB and RCA connectors for VoIP and Video Codec connectivity, with the option of adding a PSTN (analog telephone) interface or a digital telephone interface. The Phoenix Octopus can be ordered with an optional 40 watt, 4-output amplifier for powering speakers. The MT454-DTI model connects to any computer as well as any Digital phone via the headset.

The Octopus MT454-DTI is an ideal USB & Digital Telephone solution for:

  • Small to very large conference rooms
  • Classrooms and training rooms
  • Courtrooms and depositions

The Octopus is compatible with PC (Windows and Linux) and Macintosh (MAC OS). 


  • Echo Cancellation
  • Noise Suppression
  • Full Duplex Communication
  • De-reverb Filtering
  • Automatic Gain Control
  • Phantom Power Supply (3V & 24V)
  • Beamforming Microphone Array Technology

(The Octopus will assess the signals picked up by all the microphones, and decide, instantaneously, which one(s) will take part in the mixing and with what level of emphasis)

  • Bridging

(Bridging allows for 3-way communication between multiple connection sources, such as telephone, VoIP and Video Codec).


  • USB cable
  • International power supply adaptor
  • 2 rack mount ears
  • Male Phoenix speaker output connector
  • RJ11 telephone cables
  • User manual



Designation: Microphone (mixer inputs), Auxiliary, Sound Reinforcement

Number of inputs: 4 per unit

Phantom: User selectable: 3V, 24V or none (for Line inputs)

Connectors: XLR

Input Impedance (load):

3V Phantom: 2K ohm

24V Phantom: 590 Ohm

No Phantom: 2K ohm

Maximum input level: 1.8V/Gain

Gain: User selectable: 0dB to 42dB in 6dB steps

Frequency response: 20 Hz - 16 KHz

Audio Out

Connectors: RCA and XLR (the XLR is re-assigned as Link Up when the unit is configured as Slave)

Level: Line or Mic level (user selectable)

For Line level: 1.8Vpp Max

For Mic level: 90mVpp Max

Link Up level: Line (1.8Vpp fixed)

Impedance: 25 ohm

Frequency response: 20 Hz - 16 KHz

Audio (Far-End) In

Connector: RCA

Impedance: 100K ohm

Level: 1.8Vpp

Far-End (Speaker) out

Connector: 2pin terminal block

Impedance: 25 ohm

Level: 1.8Vpp Max

Com Port:

RS232 – protocol available upon request


5V, 200mAmp (through the USB connector)


Two Years

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