The AMT-5 Emergency Call Box (AMT5-ECB) is a hands-free emergency intercom device that connects and integrates to the AMT-5 CAN network. When not used for making calls, it can form part of a speaker network and behaves in the same way as a powered speaker (AMT-5 PAS) with integrated ambient noise sensor.
Calls are managed by one or more controlling nodes on the CAN network. Calls can be initiated by a controlling node or initiated by operating the push button on the front of the ECB. In the push button case the call is managed by a controlling node, with a mechanism for handing over call setup should a controlling node fail during the call setup process.
Controlling nodes can route the call to another AMT-5 device or through a gateway device to an external system including Tetra radio or a VoIP phone.
The ECB has the same self-test functions as the AMT-5 PAS speakers. A health LED is lit while the ECB unit is operational. It is extinguished when a fault is detected.
AMT5-ECB-A technical specifications:
| Specifications | AMT5-ECB-A |
|---|---|
| Physical – main body1 | |
| Height | 170 mm |
| Width | 120 mm |
| Depth | 55 mm |
| Enclosure | IP54 Steel |
| Weight | 1.9 kg |
Physical – Face Plate2 |
|
| Height | 260 mm |
| Width | 140 mm |
Power |
|
| Input Voltage | 24V DC |
| Protection | Over/under voltage Wrong polarity Short Circuit Two independent PSU input lines available |
Audio |
|
| Power Output | 6W RMS |
| Amplifier | Class D |
| Frequency Response | 100 Hz – 15 kHz |
| Streaming Audio input | 8 kHz PCM 8 kHz G.711 16 kHz PCM 16 kHz G.711 |
| Volume Control | Set by control unit. Automatically compensated for background noise using the integrated microphone. |
Network |
|
| Physical Standard | CAN 2.0B |
| Connector | Male DB9 Sub or M12 |
Inputs and Outputs |
|
| Inputs | Integrated Pushbutton |
| Outputs | Status LED |
Environmental |
|
| Operating Temperature | -25º C to 70º C |
| Humidity | 5% - 95% |
The dimensions of the AMT-5 ECB quoted are the standard device measurements. A custom housing can be designed where the standard dimensions are not suitable.↩︎
The AMT-5 ECB mounts on the train’s interior wall and has a steel faceplate with a polycarbonate adhesive decal with surface finish and graphics customized to the customer’s requirements.↩︎