How to retrieve the signal level/RSSI/RSSP/RSSQ of the IR300 via HTTP API?

How to retrieve the signal level/RSSI/RSSP/RSSQ of the IR300 via HTTP API?

RSSI:
curl -u adm:123456 192.168.2.1:4444/getinfo.cgi -d "_wan1_rssi" -H "Content-Type:text/plain"

RSRP:
curl -u adm:123456 192.168.2.1:4444/getinfo.cgi -d "_wan1_rsrp" -H "Content-Type:text/plain"

RSRQ:
curl -u adm:123456 192.168.2.1:4444/getinfo.cgi -d "_wan1_rsrq" -H "Content-Type:text/plain"

signal level：
curl -u adm:123456 192.168.2.1:4444/getinfo.cgi -d "_wan1_siglevel" -H "Content-Type:text/plain"