TDDs transmit and receive only from another device of the same kind. However, there are relay services that are available to facilitate phone calls between people with TDDs and those without. For example, an alerting device may be used to detect a phone or doorbell ringing, a baby crying, an alarm clock or microwave timer. This alerting device may also include remote receivers to flash lights in other rooms. More than one remote chime may be utilized.
Systems are available to vibrate a pillow, the whole bed or a body-worn pager.
The transmitter sends the signal to a receiver of your choice, such as a pager that vibrates, or a light that flashes. Personal Alerting Systems Uses a body-worn pager that is signaled by remote devices placed at various sound sources throughout the house. The paging signal varies by which signal was activated. We hope this information will answer some of your questions about Assistive Listening Devices. Think about the settings where you have trouble hearing.