Satel EASy+ - TX Delay; RX Delay

SATEL-EASy+
User guide
Version 1.33
35
AES is open-source software from public domain. Author: Brian Gladman (U.K). The CTR-mode is
SATEL’s in-house implementation.
The models supporting this feature and encryption level can be viewed in SATEL WEB sites at
www.satel.com/products/. The radio models that do not support the encryption feature are
compatible with the radio models with the encryption when the feature is disabled. It is not
possible to update/change the models NOT supporting the encryption to support this
feature in the field. The factory default value for the encryption feature is OFF state. The setting
state with the static, distributed encryption keys must be set equally to the radios in the same
radio network.
Please contact SATEL for more detailed information regarding the radio network compatibility
settings in radio network between different models (channel width, radio frequency etc.).
The encryption password key is generated by using Main and Aux –keys plus in the beginning of
the data packet transferred changing 32-bit string. It is mandatory to insert both information
keys with the mentioned length keys.
Options for generating the encryption keys are:
- Manually via terminal connection:
o SL commands
- Automatically with password via Configuration Manager software (generates
automatically the Main and Aux keys)
It is recommended to set up a radio network with encryption enabled by using only one selected
configuration way. The equivalency of the encryption keys between radio modems can be
verified from the Key Hash –information field. Last 4 marks indicates the equivalency [0-9, A-F].
NOTE! The encryption is designed for SATELLINE-3AS, SATEL-8FSK-1, SATEL-8FSK-2 and SATEL-
16FSK-1 –radio compatibility modes
6.7 TX delay
The radio modem can be configured to delay the beginning of a radio transmission by 1...65000
ms. The function can be used to prevent packet contention in a system, where all substations
would otherwise answer a poll of a base-station simultaneously. During this delay data sent to
the radio modem is buffered. Even when the priority setting is "RX", the radio modem is
prevented to change over to the receiving mode during the period of the TX delay. If TX delay is
not needed, its value should be set to 0 ms.
6.8 RX Delay
The radio modem can be configured to delay the beginning of a data reception (RD) by 0...255
ms. Radio sets 10 ms delay automatically if RS485 is used. Default: 0 ms.