Is the RF signal secure?
Several RF signalling schemes are used by the WAPM and WPIM to encode the RF transmissions so that it is virtually impossible for a rogue RF signal to unlock an acces point. The exact scheme used is proprietary and confidential.
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Is the RF signal encrypted?
Although the WAS does not use a standard encryption scheme, several RF
signaling schemes are used by the WAPM and WPIM to encode the RF transmissions so that it is virtually impossible for a rogue RF signal to unlock an access point. The exact scheme used is proprietary and confidential.
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How much delay does the RF communication add?
Assuming a reliable RF channel (i.e. no RF retries due to poor RF reliablity), the WAS RF signalling scheme adds less than .1 of a second signal processing delay for each RF transmission.
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What determines what RF channel is used?
A 4 position DIP switch on the WPIM determines which one of the 15 WAS RF channels will be used for that WPIM and all WAPM's linked to it.
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How many RF channels are used?
The WAS breaks the 902-928 mhz band into 15 RF channels.
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Do I need a FCC license to operate the system?
The 902-928 mhz RF frequency band used by WAS is an unlicensed band, i.e. no licensed is required.
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What RF band is used?
WAS uses the 902-928 mhz RF frequency band.
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What is “direct sequence?”
Direct sequence is one of two methods of spread spectrum modulation. The other is frequency hopping. WAS uses the direct sequence method.
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What is “spread spectrum?”
Spread spectrum is a method of modulating the RF signal that increases RF communications reliability even with the presence of noise and other RF signals. Spread spectrum spreads the data over many frequencies simultaneously.
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Why is my RF range less than expected?
If the RF range between a WPIM and WAPM is less than expected for a particular installation and the WPIM and WAPM are known to be good, then the problem is
either locally generated RF interference or an obstacle (i.e. wall) that is
attenuating the RF signal. Try another RF channel or try relocating (i.e. 6" left, right, up, down) the WPIM and/or WAPM until reliable RF communication is achieved.
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How do I extend the RF range?
The RF range between a WAPM and WPIM can be maximized by installing the WAPM and WPIM in the best locations for optimal RF reliability
and/or by using gain antennae. Refer to the "WAS Operating and Configuring" manual for the exact procedure to be used.
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How do I change an RF channel?
The RF channel used by a WPIM and it's WAPM is set by a 4 position DIP switch on the PIM. Note: changing the RF channel on a WPIM will require all the WAPMs linked to it to be re-linked. Refer to the "WAS Operating and Configuring" manual for the exact procedure to be used.
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When should I change RF channels?
Change RF channels whenever a WPIM and WAPM fail to link or if the WAPM shows many "failure to communicate" indications (i.e. a single, almost immediate red led flash after any card has been swiped). Although rare, changing the RF channel may be required if this is RF
interference on the current RF channel.
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