Question: How do I determine the signal strength of the cellular up-link of a RAP?
Product and Software: This article applies to all remote AP deployments that run ArubaOS 188.8.131.52 and later. This article is useful only for RAPs with an USB port (AP-70 and RAP-5, RAP-5WN).
You can determine the signal strength of the cellular uplink if a RAP is connected to the network using a USB modem (EVDO or 3G).
The signal strength of the cellular up-link is found in the output of the 'show ap debug system-status' command. To get to the relevant section directly, issue the following command when the RAP is connected:
show ap debug system-status ap-name <name of RAP>
(a620) #show ap debug system-status ap-name rap-5wn-2 | begin RSSI
USB Uplink RSSI(in dBm) = 85
This value is in negative dBm, and the minimum value is -113dBm. The output shown here is actually -85 dBm.
This value is obtained one time before the modem dials by sending it an AT CSQ command. After the connection is up, there is no easy and consistent way to query this. Therefore, the value only reflects the instance right before the modem dials and does not reflect current condition.
If you need a new value, you must reboot the RAP.