MADR - Microphone Amplifier for Dynamic Microphone
From Zenitel Wiki
Features
- Amplified Calling: Through separate loudspeaker
- Two-way speech communication through separate loudspeaker
- Accepts audio inputs from dynamic microphones
- Adjustable input level
- RCO input with relay and relay driver
- Fastens onto mounting rail in AlphaCom exchange.
- Additional Information:
- --> The board can also be modified to accept input electret microphones. Please consult your AlphaCom dealer.
Description
The scematics for the boards are in Chapter 23 from page 273 onwards.
The RCO input on this board has optional high or low polarity, determined by switch setting on the board. The board can thus be used in AlphaCom system as well as in the TouchLine Compact system.
The board is used for features that involve calling through loudspeakers, and provides the possibility to answer through a separate loudspeaker.
The board accepts audio imputs from dynamic microphones, and the input level is adjustable. To use the electret microphone input, it is necessary to do a modification on the board.
The built-in relay is needed when you answer in the calling speaker. The board must then be supplied with power.
The MADR is fastened onto the mounting rail on the connection field of the AlphaCom exchange. In the TouchLine Compact exchanges, a mounting rail must be fastened to a standard mounting bracket.
Connectors and Switches
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Technical Specifications
| Text | Value |
|---|---|
| Order Number | 1009960100 |
| Input Voltage:<br\>Maximum Current: | +24 V DC<br\>30 mA (relay) |
| Cable Requirements betwen the board and the exchange | Regular installation cable with screen |
| Recommended room temperature | 0'C to +35'C<br\>+32'F to +95'F |
| Humidity Range <br\> (non-condensing): | 10% - 90% RH |
| Dimensions: | 70mm x 100mm<br\>2.7" x 3.9 |
| Connector types: | Spring terminals, AMP MTA 100 connector |
Table 14-4: Specifications MADR