| 摘要 |
<p>A monitoring system including a plurality of monitoring devices (102) each configured to communicate with at least one of the other monitoring devices using a first communications network (N1) and a monitor signal processor (104) wherein each monitor device is configured to communicate with the monitor signal processor using the first communication network (N1) and a second communication network (N2). The first and second network may be WiFi mesh networks and messages may be relayed by multi hop. The monitoring devices are configured such that if one monitoring device detects an alert state in another monitoring device then the first monitoring device transfers the alert signal to the monitor signal processor using the first communication network and/or the second communications network. The monitoring device may investigate the alert signal by attempting to communicate with at least one monitoring device.</p> |
