We advise to use a default plug on the RJ11 port, reboot the device, and access this device using IP address 169.254.1.1, using the network card on same IP range (ex: IP: 169.254.1.5 and MASK: 255.255.0.0).
For the PMP450,On the radio GUI, navigate to Configuration, Unit Settings and enable and save option Set to Factory Defaults Upon Default Plug Detection. When the unit is powered on with a default/override plug
To make a default (override) plug use a RJ-11, 6 pin connector and a small length of Cat 5 cable. Short (solder) together pins 4 and 6. Remaining wires should not be connected.
Use heat shrink tubing to cover the exposed end of the cable.