The Alpha TSMBT Bus Speaker/Microphone is an essential component for modular series door entry systems, delivering reliable performance and user-friendly features. Designed specifically for the HT3011 Type S.T.R. 2 Wire ‘Bus’ Handsets, this unit combines durability with functionality, making it a perfect choice for seamless communication in various environments.
Alpha TSMBT Bus Speaker/Microphone Features
- Weather-resistant Speaker: Ensures clear audio performance even in harsh conditions, adding longevity and reliability to your communication system.
- Long-life Electret Condenser Microphone: Provides high-quality sound capture, enhancing voice clarity for effective communication.
- Illuminated Dry Contact Low Voltage Light Pushbutton: Equipped for easy visibility and operation, ensuring you never miss an important call.
- Plug-in Connector: Facilitates simple and efficient wiring, minimizing installation time and effort.
- Compact Size: At 3.94″w x 3.94″h (100mm x 100mm), it fits neatly into the MT series modular panel trim frame(s), optimizing space without compromising functionality.
- Easy Serviceability: Can be serviced using the model 13510 key/tool unit, ensuring maintenance is straightforward and hassle-free.
Alpha TSMBT Detailed Specifications
| Model | TSMBT |
| Type | Speaker/Microphone |
| Compatibility | HT3011 Type S.T.R. 2 Wire ‘Bus’ Handsets |
| Dimensions | 3.94″w x 3.94″h (100mm x 100mm) |
| Microphone Type | Long-life Electret Condenser |
| Weather Resistance | Yes |
| Pushbutton Type | Illuminated Dry Contact Low Voltage |
| Installation | Plug-in Connector |
| Service Tool | Model 13510 Key/Tool Unit |



















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