Comtech EF Data CRS-311 Installation And Operation Manual page 92

1:1 redundancy switch, accessory product for use only with comtech ef data cdm-qx/qxl and slm-5650/5650a modems (modem firmware and hardware requirements apply)
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CRS-311 1:1 Redundancy Switch
Modem, RMI/TMI, and Switch Configuration
Modem has  address 0100, and  the Redundant  Modem  uses address 1100. See Figure 4‐2 and 
Appendix C. Addressing Scheme Information
 
Once the addressing scheme is understood, proceed as follows: 
Step
Task
Configure COMMs on each modem via the modem front panel menu as follows:
1
CONFIG
2
Set the EIA-485 base address and offset, per Appendix C. Addressing Scheme Information.
 
See the CDM‐Qx Installation and Operation Manual for detailed configuration information. 
 
  
In this example, the EIA‐485 offset address does not affect Modem #1, so the offset 
can be 1‐99 without affecting other Modem's EIA‐485 addresses. 
 
REMOTE: RS-485-4W, 9600 baud, format 8-N-1.
Figure 4-2. CDM-Qx/QxL / CRS-311 EIA-485 Scheme
 for more information.  
4–4
Revision 7
MN/CRS311.IOM

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