Data Interface Support In 1:1 Or 1:N Redundancy Configurations; Table 1-2. Allowable Unit/Switch Data Interface Configurations - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710/L Broadcast Satellite Modem
Introduction
1.3.5.1.1 Data Interface Support in 1:1 or 1:N Redundancy
Configurations
1:1 Redundancy with the CRS-180 (70/140 MHz) or CRS-170A (L-Band)
Redundancy Switch: The "CDM-710/L Unit Configuration" column in Table 1-2
shows the CDM-710/L data interface combinations that are supported by the
CRS-180 or CRS-170A 1:1 Redundancy Switches. You must first select a 1:1 switch
based on the operating frequency. You must then choose your Slot 1 and Slot 2
modules. See the CRS-170A or CRS-180 1:1 Redundancy Switch datasheet and
Installation and Operation manuals for further information.
When you use a CDM-710/L as a Tx Only unit in 1:1 Redundancy, you
must remove the demodulator card. Similarly, when you use a
CDM-710/L as an Rx Only unit in 1:1 Redundancy, you must remove the
modulator card.
1:N Redundancy with the CRS-300: The CRS-300 was originally designed for
operation with the CDM-600. It has since been adapted for use with a number of
other modems. It is capable of supporting interfaces up to the point where there
are no more paths left to route traffic; this is the reason why the CRS-300
supports a limited set of the interface combinations supported by the
CDM-710/L.

Table 1-2. Allowable Unit/Switch Data Interface Configurations

CDM-710/L Unit Configuration
Interface Slot 1
CDI-40 ASI
CDI-40 ASI
CDI-60 HSSI
None
CDI-60 HSSI
1) The Redundant Unit must have the same interface cards in each
slot as any of the Traffic Units.
2) Your Traffic Unit must have the same interface cards installed in
each slot identically as any other Traffic Units. You must otherwise
install a blank panel. Interface Slots 1 and 2 are not active
simultaneously.
Interface Slot 2 TMI Card
None
CRS-325
CDI-70 GBEI
None
CDI-70 GBEI
CRS-336
CDI-70 GBEI
1–17
MN/CDM710.IOM
1:N CRS-300
Configuration
RMI Card
CRS-306
Can be used as a
Redundant Unit
CRS-306
Can be used as a
Redundant Unit
Revision 12
Notes
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