Question:  Under which Tempest base station menus can I find the network number and lockout keys?

Answer: Multiple Base Stations in Close Proximity
The Network Numbers of closely located Base Stations should be offset by at least four, for maximum performance. For example, on Base-A select Network Number “02”, on Base-B select Network Number “06”, and on Base-C select Network Number “10.” In this manner, each Base Station Network Number is different by at least four digits. This procedure will ensure that each system is operating properly and independently from an RF network perspective.
Also, adjust the Lockout Key on each Base Station. All Base Stations in one facility may have the same Lockout Key if all Network Numbers are off set by four as described above, or all may be different. Lockout keys are only differentiators for systems using the same Network Number.
The Network Number and Lockout Key settings can be adjusted from the “Radio Configuration” section of the Tech Menu.  Press the MENU button. Press the ENT button to select “Base Station Settings.” Rotate the Volume control to scroll and select “Tech Menu.” Select “Radio Configuration.” Select “Network Number.” Rotate the Volume control to adjust the value, and press ENT to save.
Press MENU to escape one level and select “Lockout Key.” Adjust the value and press ENT to save. Press MENU repeatedly to escape to the Operation screen.

Note: if you're having issues with beltpacks not logging onto basestations when there are multiple base units in the same locations, then check and compare network and lockout keys to make sure they are set as described above.