MADR - Applications

Calling Through Loudspeaker with Answer at Called Speaker

Figure 1.1 Calling Through Loudspeaker with Answer at Called Speaker

Feature Description

The AlphaCom can distribute audio through separate loudspeakers with the possibility of answering at the called speaker. When loudspeakers without amplification are used, there must not be more than 20 such loudspeakers in one system.

Equipment List

• AlphaCom System with desired station range
• Additional loudspeakers
• Power Distribution Board PDB 1009970100 (This Board is only required in an E26 installation. E7 and E20 has +24VDC outputs.)
• Microphone Amplifier Board Dynamic with Relay MADR 1009960100

In particularly noisy environments, the MADR board should be placed close to the loudspeaker. A MRBD board is then connected between the RCO output and the MADR board input. A local supply of 24 V to the relay on the MADR is needed.

• PC with AlphaPro program and cable for connection to the AlphaCom exchange

Installation

Installing the Power Distribution Board

• See PDB - Power Distribution Board

If a PDB board is already installed, you need not switch off the entire exchange. Just unplug the connector on the PDB board supplying power from the exchange.

Caution
Do not extend power cables from the PDB outside the exchange rack environment. 
Use local power for remote installation of equipment.

Installing the Microphone Amplifier Board MADR

• Fasten the MADR board onto one of the mounting rails on the distribution field.
• Supply the board with 24 V and 0 V (GND) from the Power Distribution Board.
• Connect the wires according to Figure 15-6 Calling through loudspeaker with answer in called speaker
• Set the switches in the correct positions.
• After the programming has been done, adjust the sensitivity of the microphone on the MADR board

Calling Through Loudspeaker with Answer in Separate Microphone

Figure 2.1 Calling Through Loudspeaker with Answer in Separate Microphone

Feature Description

The AlphaCom can distribute audio through loudspeakers with the possibility to answer in the separate electret or dynamic microphones. When loudspeakers without amplification are used, there must not be more than 20 such loudspeakers in one system.

Equipment List

• AlphaCom System with desired station range
• Additional loudspeakers and dynamic /electret microphones
• Microphone Amplifier Board Dynamic with Relay MADR 1009960100
• Power Distribution Board PDB 1009970100 (This Board is only required in an E26 installation. E7 and E20 has +24VDC outputs.)

Installation

Installing the Power Distribution Board

• See PDB - Power Distribution Board

If a PDB board is already installed, you need not switch off the entire exchange. Just unplug the connector on the PDB board supplying power from the exchange.

Caution
Do not extend power cables from the PDB outside the exchange rack environment. 
Use local power for remote installation of equipment.

Installing the Microphone Amplifier Board MADR

• Place the MADR board near the microphone.
• Connect the wires according to Figure 2.1.
• Set the switches in the correct positions.
• Adjust the sensitivity of the microphone on the MADR board.

It is possible to place the MADR board on one of the mounting rails in the connection field of the exchange. Then you must run a screened cable from the microphone to the MADR board and run the GND wire to exchange GND on the Subscriber connection board.

Additional Information

• No programming in necessary to use this application. We do however recommend that you program the physical connection for the PA system as a substation.