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EXBOX.BLDS is a sophisticated MADI redundancy switch for production environments with advanced reliability requirements. In addition to the standard changeover from one input to the other in the case of a loss of the MADI signal, the unit incorporates a unique feature from DirectOut, the Buffer Loop Detection System™.

Enhanced Signal Control
The Buffer Loop Detection System™ is used to detect silence or a corrupted input signal - e.g. caused by an application hang of the playout system (repeating buffers) or stuttered playback due to system overload.

A provided software tool creates a .wav file containing a low level signal which is inserted into the MADI stream. The artificial design of the Buffer Loop Detection Signal enables reliable and inaudible switch-over within one sample.

For less critical switching requirements a simple pilot tone can also be used to trigger automatic switch-over.

Input Switching
The MADI input can be switched manually by a push button on the front panel of the device. Different redundancy modes (prioritisation of inputs) offer the means to adjust the trigger behaviour of EXBOX.BLDS.

Four GPIs and four GPOs are accessible via DSUB-9 connectors. The GPIs may be used to select the MADI input or to trigger a switch-over. GPOs provide monitoring of the current input and switching state.

All-Round Functionality
EXBOX.BLDS offers highest flexibility as it provides two module based MADI ports. The customer may choose from modules of three different interface types:

  • optical SC (single-mode or multi-mode)
  • coaxial (BNC)
  • SFP 

The Small Form Factor Pluggable cage can be fitted with any SFP module suitable for the particular application.

The device can be updated with a new or customised firmware via the integral USB port.

Safe operation
Two robust Hirose sockets are available to plug in up to two external power supply units or battery packs for safe operating conditions with redundancy. 

Each EXBOX can be mounted into a standard 19’’-rack by using the optional kit BOXMOUNT.XL. Up to three devices may fit side-by-side within 1 RU.

3rd party Accessory
Frodes EXBOX.CTRL A/B SELECTOR - Remote A/B Switch. Available at Frodes.IO 


MADI ports (I/O): 2 x I/O ports - individually configurable
Modules: SC socket single/multi-mode
coaxial BNC, 75 Ω
SFP cage
Sample rates: 44.1, 48, 88.2, 96, 176.4, 192 kHz (+/- 12,5%)
MADI formats: 48k / 96k Frame, 56 / 64 channel, S/MUX
GPI: 4 x Voltage input via DSUB-9
GPO: 4 x MOSFET switch via DSUB-9
Service: Mini USB 2.0 for firmware updates (Windows®)
Power supply: external, 2 x Hirose (9 - 24 V)*
Dimensions: Width 140 mm
Height 42 mm
Depth 140 mm
Weight: about 1 kg
USB Serial driver: Windows®
BOXMOUNT.XL for 19’’ rack mount
SFP modules (LC single-mode or multi-mode)
Device variants
Single-mode: MADI port: SC-Socket single-mode
Dual PSU: optional available
* 1 x power supply included

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