Comtech EF Data CDM-625 - Manual (Page 414)

CDM-625 Advanced Satellite Modem Revision 15
IP Packet Processor Option MN-CDM625
18–2
Data Authorized Service Center for upgrade using CEFD Kit KT-0000174 (for 65W
AC units) or CEFD Kit KT-0000175 (for 65W DC units).
• CDM-625 Firmware Version 1.5.0 or later, which supports the IP Packet Processor
operational features. Factory-shipped units (i.e., units shipped with the IP Packet
Processor option) already have this firmware version pre-installed. However,
existing field units that do not run this firmware version (at a minimum) may
upgrade the firmware loads via the Flash Upgrade procedure explained in Chapter
4. UPDATING FIRMWARE.
18.1.2 Interoperability Compatibility/Limitations
A CDM-625 Advanced Satellite Modem that is equipped with the IP Packet Processor is not
interoperable for IP/Ethernet Traffic with a CDM-625 that is not equipped with the IP Packet
Processor.
18.2 IP Packet Processor Features
18.2.1 Streamline Encapsulation (SLE)
The IP Packet Processor includes Comtech EF Data’s patent-pending, very low overhead
Streamline Encapsulation (SLE). SLE can reduce the encapsulation overhead by as much as 65%
compared to industry-standard HDLC.
18.2.2 Modes of Operation
Chapter 16. ETHERNET NETWORK CONFIGURATION
A CDM-625 equipped with the IP Packet Processor can operate in four modes to support Point-
to-Point and Point-to-Multipoint network topologies:
• Router Point-to-Point • Router Hub
• Router Remote • Managed Switch
18.2.3 Subsystem Multiplex (Sub-Mux)
Chapter 15. IP SUB-MUX
Sub-Mux is a secondary framing structure that combines IP traffic with any currently available
combination of framing and interface type (excluding IP itself). A specific, user-selected ratio
references the composite data rate to the modulator and from the demodulator to the primary,
non-IP interface rate.