DMD1050TS Satellite Modem Board
Revision 1
Appendix F F–3 MN-DMD1050TS
F.4 Point-to-Multipoint Applications
In many instances, customers need to connect multiple remote sites to a central hub. Because of
the EEI’s multi-port interface and daisy chain capability, the hub router does not need to know
that there are multiple return paths. As the network grows, you will not need to change the
network configuration or buy additional router blades for the hub. Simply add the new hub
demodulator to the end of the existing daisy chain. You can bring a new remote online without
disrupting the existing traffic.
Figure F-3 shows how the DMD50, DMD20 and MD2401 multi demodulator can be used in the
same network. They provide a large outbound carrier and various return carriers, typical of an
internet café application.
Figure F-3. Point to Multipoint – Large Outbound, Smaller Returns
DMD50
DMD20
MD2401
DMD50
Tx
52 Mbps
Rx 30 Mbps
Rx 10 Mbps
Router Router
Router
Router
Daisy Chain
Daisy Chain
Hub
LAN
Remote
LAN
Remote
LAN
Remote
LAN
Rx 2 Mbps
Rx
1
Mbps
DMD50
DMD50
Tx
30 Mbps
Rx 52 Mbps
Tx 10 Mbps
Rx 52 Mbps
Tx 2 Mbps
Rx 52 Mbps
DMD50 Router
Remote
LAN
Tx 1 Mbps
Rx 52 Mbps
DMD50 Router
Remote
LAN
Tx 512 Kbps
Rx 52 Mbps
DMD50 Router
Remote
LAN
Tx 128 Kbps
Rx 52 Mbps
Rx 512 Kbps
Rx 128 Kbps
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