Comtech EF Data CDM-700 Installation And Operation Manual page 28

CDM-700 High Speed Satellite Modem
Introduction
CRS-170A and CRS-180 support 1:1 redundancy for the L-Band and 70/140 MHz, respectively.
the CRS-300 provides support for 1:N redundancy:
1:1 Redundancy with the CRS-170A (70/140 MHz) and CRS-180 (L-Band):
CDM-700 Modem Configuration
of the CDM-700 that are supported by the CRS-170A and CRS-180. 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 datasheet and manual for CRS-170A or
CRS-180 1:1 Redundancy Switches.
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-700.
Allowable CDM-700 Combinations
Slot 1
Dual G.703 (CDI-10)
OC3 Optical (CDI-50-1)
Single Mode
OC3 Copper (CDI-50-1)
HSSI (CDI-60)
GigE (CDI-70)
None
Refer to the CRS-300 1:10 Redundancy Switch Installation and Operation Manual for additional
details and operational information.
Notes:
1. A TMI (Traffic Modem Interface) Module is used with each Primary Traffic Modem.
2. An RMI (Redundant Modem Interface) Module is used with the Standby Modem.
3. As of April 2007, GigE or HSSI TMI requires a CRS-336. The CRS-336 fully replaces or
spares a CRS-335.
4. As of April 2007, the CRS-306 supersedes the CRS-305.
5. One Slot with a CDI-70 will support the maximum data rate. The 2
for the Standby Modem
column of the table below shows the data interface combinations
Slot 2
None
Dual G.703 (CDI-10)
HSSI (CDI-60)
GigE (CDI-70)
None
None
GigE (CDI-70) (Allowed
in Standby unit only)
None
HSSI (CDI-60
GigE (CDI-70)
None
Note 5
GigE (CDI-70)
Dual G.703 (CDI-10)
HSSI (CDI-60)
GigE (CDI-70)
1:N CRS-300 Configurations
Notes 1,3
TMI Module
CRS-345
CRS-345
Not Supported
CRS-345, Wired-Around Only
Not Supported
CRS-325
CRS-325
CRS-336
Not Supported
CRS-336, CDI-70 is
Wired-Around Only
CRS-336
CRS-336, One CDI-70 is
Wired-Through and the other
is Wired-Around
CRS-345
CRS-336
CRS-336
1–4
Revision 5
MN/CDM700.IOM
The Allowable
Notes 2,4
RMI Module
CRS-306
CRS-306
Not Supported
CRS-306, Wired-Around Only
Not Supported
CRS-306
CRS-306
CRS-306
Not Supported
CRS-306, CDI-70 is
Wired-Around Only
CRS-306
CRS-306, One CDI-70 is
Wired-Through and the other
is Wired-Around
CRS-306
CRS-306
CRS-306
nd
slot is needed only