Comtech EF Data CRS-500 - Manual (Page 65)

CRS-500 1:N Redundancy System Revision 2
Cables and Connections MN-CRS500
4–9
4.3 Modem Connections
4.3.1 CDM-625 Modem Connections
Sect. Description
4.3.1.1 CDM-625 Cable Connection Considerations
4.3.1.2 Control Connections
4.3.1.3 Ethernet System Communication Connections
4.3.1.4.1.1 10/100 Ethernet Traffic Data Connections (Single-port Router Mode)
4.3.1.4.2 EIA-422 Traffic Data Connections
4.3.1.5 IF Cable Connections
4.3.1.6 CRS-500  CDM-625 User Data Interface Connections
4.3.1.7 Carrier-in-Carrier (CnC) Data Connections
4.3.1.1 CDM-625 Cable Connection Considerations
Read Chapter 2. INITIAL START-UP AND CONFIGURATION CHECK LISTS. When adding a CDM-625
Advanced Satellite Modem to an operating 1:N system:
• Make sure the new modem does not interfere with existing traffic.
• Make sure the cabling is correct.
• Perform the power-up sequence correctly (see Sect. 4.5 Power Connections).
• Make sure there is no system contention from the modem Tx carrier.
• Four types of cables are used to connect the CRS-500 and the CDM-625 modems:
o
Control Cables
o
Ethernet System Communication Cables
o
Traffic Data Cables
o
IF Cables
The tables provided under Sect. 4.1.1 Configuration and Cable Connections Summary
Specify the respective cables needed for each modem and data type.
Figures provided in the chapter sections that follow show examples of the various 1:N
cable connections between the CRS-500 and the CDM-625 modems. For clarity, these
figures typically show a limited number of installed Traffic Modems.
• For user remote serial (EIA-232 or EIA-485) or Ethernet M&C communication, connect to
the CRS-500 CSU only. Do not connect directly to the Traffic or Redundant modems.