Comtech EF Data SLM-5650C CyberLynx, Инструкция по установке и эксплуатации

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SLM-5650C / SLM-5650C-ODU Satellite Modem
Revision 1
Modem Configuration 6–26 MN-SLM-5650C
Description Parameters
Future Key Activate Future Key:
•
Activate the Future Key, or
• Load and activate a new key
The Future Key can be activated after using all the 26 TEK numbers. Then, another
set of TEK loads are available.
TRANSEC Encryption Overhead:
• Overhead will increase when encryption is on.
•
TRANSEC Overhead Calculation:
(3+16 *N) / (16 * N) where N=Frame length
Next TEK:
•
TEK loads can be updated periodically up to number 26.
• The operator at the Primary modem will load the Next TEK.
Do the following steps to set the Future Key:
1. Enter the Future Key seed key and passphrase.
2. Generate the Future Key.
The key signature must match on both modems.
Encryption
Parameters Frame Length:
•
Large frame sizes use less overhead and are more efficient. However, a greater number of information
bits in the packet are impacted in noisy operating conditions.
•
Small frame sizes use more overhead but fewer bits are impacted when losing a packet. Small frame
sizes are useful when the information bits are distributed over a wide spectral bandwidth using DSSS
spreading.
Reset All Keys: Zerioze.
•
Make sure to reboot the modem after zeroizing the TRANSEC.
•
Use the Admin \ Update tab.
•
Impacts the Next TEK increment if a reboot is not done.
• The encryption state, On or Off, is maintained after zeroizing and rebooting the modem.