None of the DS7465i are working on the D8125MUX all of them are coming up as missing in view point status.
The following MUX Devices all have tampered covers: DS7460i,DS7461i,DS7465i. If the cover is off the device it will show missing in View point Status on the D8125MUX loop. Other reasons MUX devices may show missing on the D8125MUX are: Open Loop on the data wire, Unit is Addressed Wrong or not at all, D8125MUX is not programmed to look for the device, the D8125MUX is wired wrong to the Zonex of the panel.
