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AeroComm's unique embedded RF232® Protocol makes
the AC4424 and AC4490 modules drop-in transceivers. As each transceiver
receives raw data, it manages over-the-air protocol to assure
successful communication. Headers, data packet length and CRCs
are not needed.
RF232 supports point-to-point and point-to-multipoint, client/server
and peer-to-peer configurations. Broadcast communication to all
transceivers or address packets to a specific destination using
unique MAC addresses embedded in each radio.
RF protocol modes:
Acknowledgment mode (ACK)
Transmitted packets are successfully acknowledged. If not, they
are resent until successful (user-selectable number of retries).
Error detection is used and duplicate data is filtered out before
sending to the host interface. Optional full duplex control
option allows equal time for transmitting and receiving data at
the RF level, keeping a single transmitter from dominating the
system bandwidth.
Streaming mode (STRM)
Useful for audio or other applications where continuous data is
needed. This mode enables high speed, continuous transmission
of data without the delay of waiting for ACK from the recipient.
Data is transferred to the host without error-detection.
RF addressing modes:
Client/server or peer-to-peer
Unicast (one-to-one addressing)
Broadcast (one-to-many addressing)
Error detection:
Multistage error detection with transmitter retries in ACK mode
for RF system and OEM's raw data. Duplicate packets are filtered
out when the same data is received more than once due to retries
and missed ACKs. In STRM, only the RF system data is checked for
errors. The error-free raw data is passed to the OEM's interface.
Interface Protocol Control:
Change configuration commands
The AC4424's or AC4490's configuration can be changed through
a command/data interface signal. Change-on-the-fly parameters
such as client or server designation, destination MAC address,
channel number (to communicate with a different server), etc.
Custom configuration commands are available upon user request.
Auto-Configuration control
Allows for the selection of optimized protocol parameters based
on ACK, STRM, and FEC selections. This allows very simple configuration.
CTS with optional RTS flow control
CTS to hold-off the host; RTS to hold off the transceiver.
In-range indicator
Hardware link indication of a client in range of a server.
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