Comtech EF Data CDD-562L - Manual (Page 68)

CDD-562L/564 Demodulator with IP Module Revision 2
IP Module Ethernet Interface MN/CDD564L.IOM
4–12
Figure 4-4 shows a “Star Network” Point-to-Multipoint Configuration where the Hub
CDM-IP modem is transmitting a common STDMA carrier to three remote sites with CDM-IP
modems. In turn, the Remote CDM-IP is transmitting a link back to the Hub that is received by
the CDD-564 (70/140 MHz) or CDD-564L (L-Band) Satellite Quad Demodulator.
Figure 4-4. (CDD-564/564L) Point-to-Multipoint Router Working Mode Diagram
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 (Small or Large HDLC Mode). For
unicast traffic, it is best to associate a unique HDLC address for each site in the network. In this
case:
• The Hub Site is HDLC 0x01
• CDM-IP Remote ‘A’ is HDLC 0x02
• CDM-IP Remote ‘B’ is 0x03
• CDM-IP Remote ‘C’ is 0x04.