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Air-Frame Roaming:

Air-Frame units have a number of 'roaming' or 'air-route' features than can be used to both simplify configuration and to optimise the reliability of the operational network. Most of these modes use Air-Frame's mesh or daisy-chain technology.

All Air-Frame units have access to the Receive Strength Signal Indicator (RSSI) that is being output by the radio sub-system. Any Air-Frame unit is constantly aware of the quality of signal being received.

The following modes can be configured:

Auto-Route

In this mode the Air-Frame unit will find the best way home when initially powered on (and after any power loss or re-set) and will stay on this network until configured differently. This is the default factory setting and thus eliminates the need for on-site or user configuration.

Fixed

In this mode the Air-Frame unit will use the defined 'hopping pattern' or 'cell' number to find the best way home. If no access is found in the fixed 'cell' it will periodically (user defined) try and send out an ALARM via ANY OTHER network with NO_ROUTE status.

Roam-rssi

In this mode the Air-Frame unit will periodically (user defined) check for all other possible routes (irrespective of the 'hopping pattern' or 'cell' number) and join the network with the highest RSSI level over a 60 second interval (all frequencies). This change will be made irrespective of the number of hops to the Access Point i.e. signal strength is the dominant parameter.

Roam-shortest

In this mode the Air-Frame unit will periodically (user defined) check for all other possible routes (irrespective of 'hopping pattern' or 'cell' number) and join the network with the shortest number of hops to the Access Point i.e. number of hops is the dominant parameter.

always-on

In this mode the Air-Frame unit will check for all other possible routes (irrespective of 'hopping pattern' or 'cell number') IF and ONLY IF the current route has been unreachable for a (user) defined period of time. If more than one route is found it will join the one with the highest RSSI level.


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