ND SatCom SKYWAN IDU 7000, Manual

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24 Network Design and Engineering Guide 2010-10-26
General Carrier Design
Essential SkyWAN
®
Satellite Link Layer Features
Figure 2-5 Data Reception Modes
Reception Modes
In principle a Sky WAN
®
station can operate in any kind of topology. However, to be able to
communicate with more than two other stations in the network a ’Regular Data Reception’
(RDR) license is required. Hence the peer and hub stations represented in the figure would
need an RDR license, whereas the star terminals could run with the default ’Limited Data Re-
ception’ (LDR) license. The LDR license would still be sufficient if the star terminals have to
communicate with two hub stations.
i
The restriction imposed by the LDR mode does not apply to node manage-
ment via IP based protocols (SNMP, FTP, Telnet). It is therefore possible to
manage the star terminals by a network management station which is not
connected to the hub but to one of the peer stations.
In LDR mode user traffic between a peer station and a star terminal is how-
ever not possible.