M7/M7L/M7LT Modular Satellite Modem
Operation
M7/M7L/M7LT - Rev. 0.05
1-15
The M7 includes two changes to previous modems to insure proper operation.
1. The modem detects if no data is present on the Send Data input by a lack of transitions for
approximately 5 seconds and will produce a programmable alarm after that time.
2. Due to the higher data rates the M7 input circuitry automatically fine tunes the clocks to
attempt to place the data period at the optimal point with respect to the clocks. This also
helps tremendously when using the TT clock to create the transmit timing.
1.5.3.2.
Advanced IP Interface (I7)
The I7 Advanced IP interface card provides the connection between IP Ethernet networks and the M7
satellite modem as part of point-to-point or point-to-multipoint data transfer. The I7 interface (Figure
1-12) contains a complete Linux X86 computer running the open source Vyatta router. This
processor/router combination combines high performance with standard control mechanisms similar
to Cisco or Juniper routers. The I7 is a full function sophisticated router and therefore requires
configuration in order for a network to operate properly.
Figure 1-12 - Ethernet Interface (I7)
The I7 provides the following features:
Powerful x86 Atom processor based. Up to 1.6 GHz and dual virtual processors.
Robust Vyatta Linux Operating System
Industry Standard Vyatta Router overlay on Linux for control similar to IOS/JunOS. One major
advantage of Vyatta is that it provides a clean single point configuration interface and saved
configuration file.
Modem command line and web control.
Refer to Table 3-9 front panel configuration and Section 3.8.1 for technical information on this
interface option.
