Appendix C: Wireless Device Network Indicators

The signal quality level is based on the LQI and PER network indicators, as shown in the following table:

The following table describes the network indicators of wireless devices.

Information type	Description
RSSI	Displays the power level of the wireless signal. 0 to -65 dbm indicates a good power level -65 to -75 dbm indicates an average power level -75 dbm indicates a poor power level with risk of outage
LQI	Displays the measurement of the strength and/or the quality of the received frames. NOTE: It is recommended to use this indicator as the main indicator of acceptance.
PER	Displays the ratio of the packet that does not reach a destination over the total expected number of packets. It is expressed as a percentage. The calculation of the PER (packet error rate) indicator depends on the type of indicator: Device indicator: provided by the device. Panel Server indicator: calculated over a sliding window equal to 20 x publication period , and refreshed every 30 seconds. Link indicator: displays the higher of the two previous indicators.

Information type

Description

Displays the power level of the wireless signal.

Displays the measurement of the strength and/or the quality of the received frames.

NOTE: It is recommended to use this indicator as the main indicator of acceptance.

Displays the ratio of the packet that does not reach a destination over the total expected number of packets. It is expressed as a percentage.

The calculation of the PER (packet error rate) indicator depends on the type of indicator:

Device indicator: provided by the device.
Panel Server indicator: calculated over a sliding window equal to 20 x publication period , and refreshed every 30 seconds.
Link indicator: displays the higher of the two previous indicators.