Before you mix up different hardware, or try to add to an existing pager system, it’s worth doing a few checks to avoid wasting money.
Match the Frequency First
Your wireless call buttons and wireless receivers need to be operating on the same radio frequency. For UK use this will typically be 433 MHz or 868 MHz. You must also check that the use of the frequency is allowed under UK radio equipment regulations.
Check Brand and Protocol Compatibility
Many wireless call buttons use different signal protocols, even where the frequency is the same. This is why it is very important to check for cross-device compatibility between buttons and receivers, even from different manufacturers.
Count the Paired Device Limit
Typically a receiver will have a maximum number of paired devices (e.g. 20, 50). As you approach this limit, you may find that additional buttons will not function.
Check the Pager Display Length
Some paging displays have very small alert message fields, often no more than 8 to 12 characters, including space. Therefore if you are displaying location names, or longer messages, then check the maximum length of alert messages that can be displayed by your pager.
Align the Environment Ratings
The rating for a call button will give an indication of what you can expect to use the button for (indoor / dry use, etc). A receiver may require a different rating for use in different environments (kitchen / near entrance, etc). There is more on Wireless Call Buttons at https://www.dinggly.com/us/products/wireless-call-buttons/.
Confirm the Power Supply
Typically buttons are supplied as battery powered but receivers can be supplied as mains powered (plug-in) or even PoE (power over Ethernet) powered. Check the power supply for your new device with your intended use.
By checking these simple points before you purchase, you can prevent ordering parts that are not compatible and ensure your whole system is working correctly and not as a collection of separate parts.