Comtech EF Data CDM-570A - Manual (Page 496)

CDM-570L/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Appendix D Revision 2
D–38
D.3.1.1.3.2 Router Mode – Point-to-MultiPoint
Figure D-7. Router Point-to-MultiPoint Working Mode w/HDLC
Figure D-7 shows a Point-to-MultiPoint configuration (also referred to as a “STAR Network”).
The Hub CDM-IP is transmitting a common 2.048 Mbps link to THREE remote CDM-IPs. All three
remote CDM-IPs are transmitting a 256 kbps link back to the Hub CDD-564/L IP Quad
Demodulator.
Since this is a Point-to-MultiPoint configuration, HDLC addressing is used so that the traffic not
intended for a particular destination can be filtered. For Unicast traffic, it is best to associate a
unique HDLC address for each site in the network. For this case:
• The Hub Site is HDLC 0x01;
• Remote ‘A’ is HDLC 0x02;
• Remote ‘B’ is 0x03;
• Remote ‘C’ is 0x04.
Router Point-to-MultiPoint Working Mode with HDLC Addressing only applies to
CDM-IPs and CDD-564/L IPs operating with CDM-IP Modem(s).