ControlSpace EX-4ML & EX-8ML Endpoints

The Bose ControlSpace® EX-4ML and EX-8ML are 4-channel and 8-channel Dante® endpoints for microphone inputs and logic inputs and outputs.

Both endpoints are designed to be mounted to the bottom surface of a table and may be mounted in many ways. Keyhole mounting tabs are available on each side of the endpoints for standard mounting directly to the underside of a table. For more discrete mounting, these keyhole tabs can be removed, rotated 180 degrees, and remounted, so the keyhole slots and mounting screws are hidden under the body of the endpoint. These tabs can also be removed entirely to allow the use of the accessory bracket. The accessory bracket is attached to the bottom of the table and the endpoint is held in place on the accessory bracket by rare earth magnets. This is a very strong connection, but two retaining screws are also available to secure the endpoint after mounting it to the bracket. The accessory bracket can be mounted to stone or synthetic surfaces using appropriate epoxy adhesives, or may be shipped directly to the table manufacturer for mounting to tables that cannot be modified in the field. The accessory bracket also includes cable lacing points on each end.

The logo side of each endpoint includes a discrete power LED as well as a signal-present LED for each channel.

Front Panel Connections
The front panels of the 4-channel and 8-channel endpoints are identical. An Ethernet jack is provided for connection to the Dante network. Power can be provided to the endpoint by Power over Ethernet or by using a 12-volt power supply with either a barrel plug or Euroblock connectors.

For each channel, Euroblock connections are available for balanced audio input as well as a logic input and two logic outputs. In most cases, the logic input would be connected to a mute button on each microphone and one or both logic outputs would be used to control the LED indicator on the microphone depending on the wiring of the LEDs. However, the logic input and outputs do appear in ControlSpace® Designer as standard GPIO connections and can be used for any functionality that could normally be assigned to a GPIO.

Many teleconference microphones use the mic’s phantom power to illuminate the indicator LED. If you are using a microphone that requires an external power supply for the LED indicator, a 12-volt DC power output is provided between channels 2 and 3.

For microphones that are factory terminated with an RJ-45 plug, there is no need to remove the factory termination. Bose offers an adaptor cable, which allows these mics to be connected to the under-table devices without needing to modify the microphones.

Rear Panel Connections
Microphone and logic connections for channels 5 through 8 on the EX-8ML are located on the rear panel.

Both the 4-channel and 8-channel endpoint have a second Dante Ethernet port on the rear panel along with a 12-volt power output. The Ethernet port is connected to an internal Ethernet switch, which provides the ability to daisy-chain multiple endpoints on a single Dante network connection at the table. However, the rear panel Ethernet port does not provide Power over Ethernet to any daisy-chained devices. If an endpoint is being powered by a Power over Ethernet switch, that first endpoint will be consuming some of the available power from the switch. Depending on whether the switch is PoE or PoE+, and also which microphones are being used, the switch may be able to provide enough power for up to 4 endpoints. However, the first endpoint is not able to provide a full PoE output because it has consumed some of the available power from the switch. When daisy-chaining multiple endpoints, the first endpoint may be powered by Power over Ethernet, and then the additional available power is provided from the first endpoint to the second endpoint by wiring the 12-volt output on the first endpoint to the 12-volt input on the second endpoint. Additional endpoints may be daisy-chained after the second endpoint if the total power consumption by all endpoints and the attached microphones is less than the amount of power being supplied by the PoE switch. Power consumption for each endpoint and many common types of teleconferencing microphones can be found in the Bose Professional knowledgebase.