Allowable Data Interface Combinations - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Introduction
1.3.5

Allowable Data Interface Combinations

Data interfaces are installed or removed from the rear of the CDM-710 chassis into Slot 1 and
Slot 2 of the CDM-710. The allowable combination of data interfaces and the data interfaces that
are supported for redundancy are found in the table that follows. In all cases, only one data
interface is active at a time.
Additional information relating to the data interfaces supported in 1:1 and 1:N support is also
provided.
1:1 Redundancy with the CRS-170A (70/140 MHz) and CRS-180 (L-Band): The "Allowable
CDM-710 Modem Configuration" column in the table that follows shows the data interface
combinations of the modem that are supported by the CRS-170A and CRS-180 1:1 Redundancy
Switches. First, the 1:1 switch is selected depending upon the operating frequency, and then a
data interface kit for Slot 1 and Slot 2 is chosen. More information on these kits is provided in the
CRS-170A or CRS-180 1:1 Redundancy Switch datasheet and Installation and Operation manual.
1:N Redundancy with the CRS-300: The CRS-300 was originally designed for operation with the
CDM-600 and subsequently adapted to 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.
CDM-710 Modem Configuration
Interface Slot 1
ASI (CDI-40)
ASI (CDI-40)
HSSI (CDI-60)
None
HSSI (CDI-60)
Notes:
1. The Redundant Modem must have the same interface cards in each slot as any of the
Traffic Modems.
2. The Traffic Modem must have the same interface cards in each slot as any of the other
Traffic Modems have, or a blank panel installed.
3. Interface Slots 1 and 2 are not active simultaneously.
1:N CRS-300 Configuration
Interface Slot 2 TMI Card
None
CRS-325
GbE (CDI-70)
None
GbE (CDI-70)
CRS-336
GbE (CDI-70)
1–9
RMI Card
CRS-306
Can be used as
Redundant Modem
CRS-306
Can be used as
Redundant Modem
Revision 11
MN/CDM710.IOM
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