Modem-To-User Ip (10/100 Ethernet) Interface Example - Comtech EF Data CRS-170A Installation And Operation Manual

CRS-170A L-Band 1:1 Redundancy Switch
Cables and Connections

5.8.1.3.1.4 Modem-to-User IP (10/100 Ethernet) Interface Example

Figure 5-44 shows the block diagram and cabling example for a CDM-570AL or CDM-570L 1:1 modem
configuration using the IP (10/100 Ethernet) Interface. This configuration requires no cabling kit – you
must use user-provided Ethernet cables and hub for direct connection to the ports.
For the CDM-570AL or CDM-570L in Managed Switch Mode (also called Ethernet Bridge
Mode), you MUST use an external Ethernet hub to ensure that traffic will continue after a
switchover. If an Ethernet switch is used, there could be a several minute outage while the
Ethernet Switch "re-learns" the correct output Ethernet port. Using a "dumb" Ethernet hub
allows LAN to WAN traffic to continue even after a switchover occurs since both modems
will be receiving the LAN traffic.
CDM-570AL or CDM-570L Block Diagram – IP (10/100 Ethernet) Interface
Figure 5-44. CDM-570AL or CDM-570L IP (10/100 Ethernet) 1:1 Example
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