Installation Guide

Chapter 3: Operation Radio Recovery
Page
3-91
Note
The radio enters recovery mode when a short power cycle is used. The radio will boot
normally if power has been removed for a longer period (typically 5 - 10 seconds).
Default Mode (or Default/Override Plug) - PMP/PTP 450 Series
The default mode allows to temporarily override some PMP/PTP 450 Series ODU settings and thereby
regain control of the module by powering the module on with the Default Plug inserted into the unit’s
synchronization (RJ11) port.
This override plug is needed for access to the module in any of the following cases:
• You have forgotten either
o the IP address assigned to the ODU.
o the password that provides access to the ODU.
• The ODU has been locked by the No Remote Access feature.
• You want local access to a module that has had the 802.3 link disabled in the Configuration page.
You can configure the module such that, when it senses the override plug, it responds by either
• resetting the LAN1 IP address to 169.254.1.1, allowing access through the default configuration
without changing the configuration, whereupon you will be able to view and reset any non-default
values as you wish.
• resetting all configurable parameters to their factory default values.
Note
The Default Plug is available from Best-Tronics Manufacturing, Inc.
See https://btpa.com/Cambium-Products/ as Part BT-0583 (RJ-11 Default Plug).
Alternatively, you can fabricate an override plug. See Override plug cable in Planning and
Installation Guide for pinout.
Using the Default/Override Plug
The following section details usage of the override plug to regain access to PMP/PTP 450 Series ODU.
Note
While the override plug is connected to a PMP/PTP 450 Series ODU, the ODU can
neither register nor allow registration of another ODU.
Note
Since the 900 MHz SM is based on the 450 Series, it only supports the "Default Plug"
mode of overriding.