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SLM-7650 Satellite Modem
Operation
3.5.5
VSAT-IBS Operation
The VSAT-IBS mode of operation configures the modem for open and closed network
applications operating in compliance with Appendix K of the IESS-309 Intelsat standard.
The VSAT-IBS mode does not allow any overhead to be added to the selected data rates
but requires Reed-Solomon concatenated outer coding. The R-S parameters that are
required for this mode of operation are n=219, k=201, t=9 with an interleaver depth of 4.
The available IBS data rates are n x 64 kbps from 64 kbps to 8.448 Mbps.
The data type will be MIL-188 (RS-422) and an optional overhead card is required for
G.703 or any other baseband interface.
3-41
Revision 4
MN/SLM7650.IOM
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