The AA903C from Alpha is a versatile Ring Master Station designed for seamless integration with various back-box models. Featuring a sleek brushed aluminum front plate, it provides clear hands-free communication within a range of 3-5 meters (10-15 feet). The device is equipped with a comprehensive set of functions including numeric dialing, volume control, privacy features, and an optional handset connector, making it a reliable choice for intercom systems.
Alpha AA903C Ring Master Station Features
- Clear two-way communications: Ensures effective dialogue without interruptions.
- Total privacy with warning tone: Guarantees confidential conversations, alerting users when privacy mode is activated.
- Discreet call mode: Allows for quiet notifications, preserving the ambiance of the environment.
- Ringing tone / Voice insert: Provides customizable alerts for incoming calls, enhancing user experience.
- Microphone cut-out / Conference: Facilitates group discussions by enabling microphone control.
- Remote control circuits: Easily manage door locks and bells directly from the station.
- Automatic busy call-back: Automatically returns calls when the station is available, improving communication efficiency.
- Hurry-up tone: Alerts users to urgent calls, ensuring timely responses.
- All/Group calls with reply-back: Supports efficient communication across multiple users with feedback capabilities.
- Automatic call redirection: Redirects calls seamlessly to ensure they are not missed.
- Secretary transfer: Streamlines communication through easy call forwarding.
- Group hunting / Priority: Prioritizes calls to enhance response times in busy environments.
- Speed dialing: Saves time by allowing quick access to frequently dialed numbers.
- Status LED: Provides visual confirmation of station status for user convenience.
Alpha AA903C Detailed Specifications
| Model | AA903C |
| Material | Brushed Aluminium |
| Communication Range | 3-5 meters (10-15 feet) |
| Dialing Method | 10 Numeric DTMF Buttons |
| Additional Features | Push-to-Talk, Cancel, Volume Control, Privacy, Mute |
| Back-Box Compatibility | BBF863, BBS863, BBD905 |
| Optional Handset Connector | Yes, for GD501 Privacy Handset |
| Speaker Impedance | 50 ohms recommended for parallel speaker |
| Compatible Systems | RM5000EX and/or CB901EX series |



















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