Mocomtech CRS-300 - Manual (Page 132)

CRS-300 1:10 Redundancy Switch Revision 16
Cables and Connections MN/CRS300.IOM
4–72
4.10 SLM-5650/5650A Modem Connections
If adding a modem to an operating 1:N system, care needs to be taken to not interfere with the
existing Traffic Modem. The cabling, power-up sequence, and communication connections must
be correct to avoid contention in the system from the modem Tx carrier. This information is
detailed in
Chapter 7.4.5 (CONFIG) ACTIVE MODEMS .
4.10.1 RMI/TMI Limitations and Considerations
Some consideration must be made when choosing which TMIs can be mixed within the same
CRS-300. Because the RMIs (CRS-306/-307) cannot provide connections to all of the data types
on the SLM-5650/5650A Redundant Modem, the customer must choose which RMI card is the
best choice for use with the CRS-300 Redundancy switch. This will then dictate which TMIs that
the CRS-300 can support.
IMPORTANT
1. The Redundant Modem shall have the same option card as any Traffic Modem.
2. Depending on the traffic data type, the appropriate jumper settings are
provided on the TMI to ensure proper operation for EIA-422 with RTS/CTS,
DTR/DSR signal using the CRS-316 TMI, or for HSSI with CA/TA signals
using the CRS-336 TMI. Refer to Chapter 4. MODEM, TMI, AND SWITCH
CONFIGURATION for this important configuration information.
3. When used with the CRS-300, the SLM-5650/5650A is NOT compatible for
use in a Vipersat network.
4. Modems using a single port (i.e., Port 1) of the 4-Port Network Processor
Module can NOT be mixed with modems using EIA-530 or HSSI data
interfaces, or the G.703 or single port Gigabit Ethernet module options.
4.10.2 Control Cable Connections – CRS-300 to Modems
The Control Cable CA/WR12136-1 provides the serial communication path between the Switch
and the modems and controls the modem’s external Tx IF-mute control line, and is therefore
always required.
To provide User access to the AGC and I&Q outputs of the modem, Control Y-Cable
CA/WR12842-6, sold separately, is available for use in place of the CA/WR12136-1 cable. See
Appendix A. CABLE DRAWINGS for detailed information about these optional cable
assemblies.
Refer to Figure 4-32 through Figure 4-34 to connect and secure the CA/WR12136-1 cable (or the
Control Y-Cable CA/WR12482-6, if used) between the CRS-300 and each SLM-5650/5650A as
follows:
• HD-15F connector labeled “J1” on the RMI or TMI(s), to
• HD-15F connector labeled “J9 Auxiliary” on the SLM-5650/5650A.
4.10.3 Traffic Data Connections – CRS-300 to Modems
Referring to Figure 4-32:
If HSSI is the traffic data type , connect and secure the HSSI Data Cable CA/WR9189-6
between the CRS-300 and each SLM-5650/5650A as follows: