RF Transmission and Protocol Architecture
The SOLT SB7 series 1-button wireless cancel call point (reference KTI040120SLT1XBK) functions as a dedicated call-clearing peripheral within the SOLT wireless communication architecture. Built with an internal 360-degree omnidirectional PCB antenna, the unit broadcasts radio frequency signals on the 433 MHz frequency band utilizing Frequency Shift Keying (FSK) modulation. By conforming to the FSK Low Power Data Transmission Standard, the cancel point transmits robust, interference-resistant data telegrams without directional blind angles.
Engineered to reset and clear active alerts, this black-finish cancel terminal broadcasts a distinct digital reset packet across the local RF coverage zone. When an attendant, nurse, or staff member depresses the single cancel button, the unit activates its integrated indirect LED lighting to provide visual transmission confirmation while sending the clearing instruction to central receivers and mobile pagers.
Interoperability with SOLT Central Display Receivers
The cancel call point is fully interoperable with SOLT SM3 series multi-digit master display receivers deployed at nursing stations, central control desks, and attendant pantries. When paired within a system, pressing the cancel button instantly removes the active call from the display queue, signaling that the service request has been attended to. Verified central receiver hardware includes:
- SOLT SM3-23PC: Multi-digit LED display receiver for central queue and call station monitoring.
- SOLT SM3-33PC: Multi-call central display station supporting simultaneous incoming alert tracking and instant status clearance.
- SOLT SM3-61PC: High-capacity central receiver engineered for high-density ward, clinic, and large-format facility monitoring.
Mobile Staff Notification and Wrist Pager Integration
In mobile alert workflows across hospital wards, assisted living facilities, and hospitality venues, the SB7 cancel point communicates directly with wearable staff receivers. Clearing an alert at the point of care resets notifications across active pagers, preventing multiple personnel from responding to an already serviced location. Fully compatible mobile receiver models include:
- SOLT SP7-100: Alphanumeric wrist pager receiver worn by on-duty medical and service personnel.
- SOLT SP5-200: Wearable mobile watch pager providing discrete vibration and numeric call clearance alerts.
Wireless Coverage Extension via Signal Repeaters
Under open field conditions, the unit achieves a reliable wireless transmission reach of approximately 100 meters. In environments characterized by structural attenuation—such as reinforced concrete walls, metallic shielding, or multi-floor commercial structures—the transmission reach is expandable through dedicated RF amplification hardware:
- SOLT SR5 Series Signal Repeaters: Wireless range extenders that capture, regenerate, and retransmit 433 MHz FSK packets to eliminate RF shadow zones between peripheral cancel points and central receivers across multiple building levels.
Hardware Compatibility Overview
| Device Category | Model / Series | Functional Role in System |
|---|---|---|
| Central Display Receivers | SOLT SM3-23PC, SM3-33PC, SM3-61PC | Displays active call numbers and clears queues upon receiving cancel signal |
| Mobile Wrist Pagers | SOLT SP7-100, SP5-200 | Receives real-time reset signal to clear roaming staff alert notifications |
| RF Signal Extenders | SOLT SR5 Series Repeaters | Extends 433 MHz FSK wireless transmission range across shadowed areas and floors |
Power and Physical Mounting Compatibility
The unit requires no physical data cabling or mains wiring infrastructure. Autonomous electrical operation is provided by 2 x CR2032 lithium coin cell batteries (they are not included), delivering a service lifespan of 18 to 24 months under standard facility duty cycles. Measuring 60 mm in diameter and 15 mm in thickness with a weight of approximately 29 grams, the double-molded case is sealed to the IEC/EN 60529 IPX8 continuous water immersion standard. This allows secure surface mounting via high-adhesion double-sided tape or wall brackets inside wet areas, patient shower cubicles, washrooms, and sanitized clinical environments.
