Wireless voice alarm and public announcement system

摘要

An apparatus is provided, wherein the apparatus includes an audio annunciator of a security system that protects a secured geographic area, a first wireless interface of the annunciator that wirelessly exchanges synchronization and channel maintenance messages with a control panel of the security system under a TDMA format, and a second wireless interface of the annunciator that wirelessly exchanges alarm messages with the control panel of the security system through a second wireless interface under a CSMA/CA format, the second wireless interface being maintained in a deactivated state until an alarm message is detected from the control panel through the first wireless interface, the second interface being activated in response to the alarm message, wherein audio information is thereafter streamed from the control panel to the annunciator through the second wireless interface.

主权项

1. An apparatus comprising:
an audio annunciator of a security system that protects a secured geographic area; a first wireless interface of the audio annunciator that wirelessly exchanges synchronization and channel maintenance messages with a control panel of the security system under a time division multiple access (TDMA) format and receives an activation message from the control panel; and a second wireless interface of the annunciator that wirelessly receives audio information from the control panel of the security system under a carrier sense multiple access and collision avoidance (CSMA/CA) format, wherein the second wireless interface is maintained in a deactivated state until the activation message is detected from the control panel through the first wireless interface, wherein the second wireless interface is activated in response to the activation message, and wherein the audio information is thereafter streamed from the control panel to the audio annunciator through the second wireless interface.