Snmp a problem and a request

Greetings. I have mimosa devices (c5x, c5c, b5c and b11). We have a monitoring system via SNMP but radios often take time to respond, throwing a timeout in the request. This causes our systems to send false disconnect alerts. All of our units run the latest firmware and the firewall is disabled. As well as we need to be able to monitor the voltage via snmp, since some radios are directly on 24v lines, but this function is not integrated.