Figure 36: Forced Switch Radio Mode - Cambium Networks PMP 400 Series Configuration And User's Manual

PMP 400/430 and PTP 200/230 Series Configuration and User Guide
Power requirements
Since the power requirements of a PMP 430 AP are different than that of a PMP 450 AP, operators will need
to make sure they can power their PMP 450 AP at the PMP 430 AP site. The PMP 430 AP requires 56V;
the PMP 450 AP requires 30V. If the existing AP site has a CMM4, it will be necessary to add a 30V power
supply and then configure the CMM4 for 30V in the GUI. If a power injector is used, it will be necessary to
replace the 56V one with a 30V one. At the customer location, if a PMP 430 SM is replaced with a PMP 450
SM, no power change is needed because both the PMP 430 SM and the PMP 450 SM use the same power
(30V).
PMP 430 scanning procedure algorithm
Once upgraded to Release 12.2 the PMP 430 SM can operate both in PMP 430 mode and in PMP 450
interoperability mode. The mode(s) the PMP 430 SM scans in are controlled via SMNP or GUI by checking
or unchecking the two corresponding checkboxes.
If only one checkbox is selected, the PMP 430 will scan in the selected mode only. If both checkboxes are
selected, after a reboot the PMP 430 SM will first scan in the last used mode. If after 10 minutes the SM
does not connect to an AP, it will switch modes and start scanning in the other mode. Since the last used
mode is always the first one to be selected for scanning, having both checkboxes selected does not
increase registration time.
It is recommended to leave both checkboxes selected so that the PMP 430 always has the capability of
connecting to both the PMP 430 AP and the PMP 450 AP.
Forced Switch Radio Mode
In case the PMP 430 SM receives a strong enough signal to connect to both a PMP 430 AP and a PMP 450
AP, it is possible to control the AP the SM connects to by using the forced switch radio mode functionality.
The "Switch Radio Mode and Reboot" command instructs the PMP 430 SM to reboot and switch mode, as
opposed to reboot and use the current mode, like it was described in the previous section.
This functionality can be used for example if a PMP 450 AP is installed alongside a PMP 430 AP before the
PMP 430 AP is removed from the sector. In this scenario, without the forced switch radio mode functionality,
after a reboot the PMP 430 SMs start scanning in the last used mode, which is PMP 430 mode; they see the
PMP 430 AP and always connect to it.
The forced switch radio mode forces the PMP 430 SMs to start scanning in PMP 450 interoperability mode
instead. In this mode they see the PMP 450 AP signal and connect to it instead of the PMP 430 AP.

Figure 36: Forced switch radio mode

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