User's Manual

Spread Spectrum Wireless Data Transceiver User Manual
LUM0002AF Rev E Version 6.3 46
3. A diagnostics cable. (Available from FreeWave Technologies.)
4. Diagnostics software. (Available on the User Manual and System Tools CD.)
For more information on Diagnostics, please contact FreeWave Technical Support at [phone].
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SUBNET ID
The Subnet ID function only works in MultiPoint Networks utilizing the Network ID option. In a MultiPoint
Network, a Slave or Repeater will connect with the first Repeater or Master that it hears with the same
Network ID. However, where communications need to be forced to follow a specific path the SubNet ID is
quite useful. Subnet ID is particularly helpful to force two Repeaters in the same network to operate in series
rather than in parallel, or if desired, to force Slaves to communicate to a specific Repeater for load balancing
purposes. Two components exist with regard to the Subnet ID:
1. Rcv Subnet ID. This setting identifies which transceiver a Repeater or Slave will listen to.
2. Xmt Subnet ID. This setting identifies the ID on which this device transmits, and in turn which
devices will listen to it. The Xmt Subnet ID parameter is relevant for MultiPoint Repeaters only.
The default (disable) setting for both Rcv and Xmt is F.
Notes: A Master will always transmit and receive on 0. With firmware of 2.40 and greater (900MHz) or
3.40 and greater (2.4GHz) the Master may be set to use alternate Subnet ID values. Changing
these settings on the Master is not recommended, under normal circumstances.
In some MultiPoint Networks, the FreqKey will be at the same setting for all transceivers. In other
networks, where parallel Repeaters are introduced, the FreqKey value will need to change. See
FreqKey and Repeater Frequency sections earlier in this manual for more information.
If both Rcv Subnet ID and Xmt Subnet ID are set to 0 the Subnet ID will show Roaming in the
menu. This setting will allow a mobile Slave to roam from subnet to subnet and possibly from
network to network.
This drawing depicts a Network in which Subnet ID’s are used to force communications. In this example,
Repeater1 must talk directly to the Master; Repeater2 must talk directly to Repeater1. Slaves 1, 2, and 3
are forced along the direction of the solid lines. Slave4 may link to the first Master or Repeater it hears.
The respective Subnet ID diagram and settings are shown below.