MADR - Applications
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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
- 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.
- 20-63 Ohm loudspeaker
- In AlphaCom E26 the Power Distribution Board PDB 1009970100 is required to power the MADR (The AlphaCom E7 and E20 has integrated +24VDC outputs.) See Powering Additional Equipment
Installation
- 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 1.1 Calling through loudspeaker with answer in called speaker
- Set all switches (S1-S4) in position 2-3.
- Adjust the sensitivity of the microphone on the MADR board
Programming
The voice direction can be switched on and off by an RCO command in the Event Handler.
How to configure the relay operation:
- In Exchange & System -> RCO, map a free RCO to the relay of the station.
- In Users & Stations select the MADR directory number in the list box, and press the button 'Events'. 'Insert' a new event with the following attributes:
| Event Owner: | The MADR directory number |
| Event type: | 1 - Audio |
| Subevent: | 126 (Press 'Details' to select which types of audio. 126 means all types of audio) |
| When change to: | ON or OFF |
| When related to: | (not used) |
| Action: | RCO 10 |
RCO 10 is used as an example. Use the RCO number you have assigned to the MADR physical connection.
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
- 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
- Place the MADR board near the microphone.
- Connect the wires according to Figure 2.1.
- Set all switches (S1-S4) in position 2-3.
- 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.
Programming
- 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.
Additional information
If an electret microphone is used, the MADR board has to be modified.