Comtech EF Data CRS-500 - Manual (Page 77)

CRS-500 1:N Redundancy System Revision 2
Cables and Connections MN-CRS500
4–21
4.3.2 CDM-750 Modem Connections
Sect. Description
4.3.2.1 CDM-625 Cable Connection Considerations
4.3.2.2 Control Connections
4.3.2.3.1 Ethernet System Communication Connections – 10/100/1000 GbE
4.3.2.3.2 Ethernet System Communication Connections – Unbalanced G.703
4.3.2.4.1 10/100/1000 Ethernet Traffic Data Connections
4.3.2.4.2 Unbalanced G.703 Traffic Data Connections
4.3.2.5 IF Cable Connections
4.3.2.6 CRS-500  CDM-625 User Data Interface Connections
4.3.2.7 Carrier-in-Carrier (CnC) Data Connections
4.3.2.1 CDM-750 Cable Connection Considerations
Read Chapter 2. INITIAL START-UP AND CONFIGURATION CHECK LISTS. When adding a CDM-750
Advanced High Speed Trunking Modem to an operating 1:N system:
• Make sure the CDM-750 uses only the CRS-505 Redundant Modem Interface (RMI).
• Make sure the new modem does not interfere with existing traffic.
• Make sure the Traffic modems have the same traffic data types within the same
CRS-500 1:N Redundancy System.
• 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-750 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-750 modems. For clarity, these
figures typically show a limited number of installed Traffic Modems.