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CL4490 User’s Manual
Broadcast
Attempts (For Servers in Point-to-Multipoint networks only): This value
represents the number of times a data packet will be transmitted by the Server ConnexLink. The
default value is 4 attempts. If communication is lost and the Clients’ Link LED is on, try
increasing this value in small increments until communication is reestablished.
The valid range of
values for this field is 2 to 255.
System Identification: A number from 0 to 256 that provides added security to each
independent network of CN4490 units. The System ID is used in conjunction with the Channel
Number and serves as an RF password to maintain secure transfers of data. The combination of
the Channel Number and System ID must be unique to each network of CN4490 to establish
communication. Multiple Servers in the same coverage area
must be programmed with different
Channel Numbers to prevent inoperability of the networks. The System ID
will not prevent
inoperability that occurs from locating multiple Servers with the same Channel Number in the
same coverage area.
Important Note: Separate Collocated CN4490 networks must operate on different Channel
Numbers. All units in a given CN4490 network must have identical Channel Numbers and
System IDs.
Data Encryption
Key: Encryption is the process of encoding an information bit stream to secure
the data content. The DES algorithm is a common, simple and well-established encryption
routine. An encryption key of 56 bits is used to encrypt the packet. The receiver must use the
exact same key to decrypt the packet; otherwise garbled data will be produced.
D
estination Address: The MAC Address of the remote CN4490 in a Point-to-Point network.
Used to optimize Point-to-Point communications by utilizing RF Acknowledgement.
Firmware Version: Displays the CN4490’s firmware version.
RF Delivery: Displays the CN4490 RF delivery mode. RF delivery mode is broadcast if the
System Config is set to point to multipoint, is addressed otherwise.
MAC Address: A unique 6 Byte, IEEE 802.3 Ethernet address assigned by AeroComm to each
CN4490.
4.2.2.2 Optional Settings
Data Encryption: Enables the Data Encryption Key. All CN4490s in the same network must
have the same encryption setting.
Parity: Needs to be enabled if host requires even or odd parity and 8 data bits. This is
considered as 9-bit mode. Note: Enabling Parity cuts the overall throughput into half.
Full Duplex: This mode restricts Client radios to transmitting on odd numbered frequency hop
bins and the Server to even numbered frequency hop bins. Though the RF hardware is still
technically half duplex, it makes the transceiver seem full duplex. This can cause overall
throughputs to be cut in half. Note: All transceivers on the same network must have the
same setting for Full Duplex.
Modem Mode: Needs to be enabled if Email Alerts need to be generated refer to section 7.4
Email Alerts for details.
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