ViewComm II in Passive (Monitor) Configuration |
- ViewComm Async II interfaces directly with the hardware UART by means of a specially modified serial port driver.
The drivers are adaptations of the standard Microsoft Windows serial driver for each supported operating system. This provides both 100% compatibility so that your
Internet connections and other serial communications software work normally.
Click here to see an illustration of how ViewComm Async II works.
- Passive monitoring means that VCS is read-only; it taps into both transmit and receive data and also looks at the modem control and status signals without attempting to change anything.
Contrast this with the source modes of VCS Async, in which VCS can also transmit.
- Note that passive monitoring comes in several flavors with VCS:
- Async II in spy mode hooks into a serial port on a PC while communications software runs on the same port.
- Async II also connects by a special cable set to one or two external devices (which can include a different serial port on the same PC that runs VCS).
- ViewComm Ethernet II works in Passive mode only.
- Contrast with Source Mode which allow you to interact With a device under Test.
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Dual Port Monitor Configuration |
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Passively monitor data and signals between attached DTE and DCE devices while the two devices are communicating. Use this configuration
when you have two serial ports on the PC running VCS Async II.
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Single Port Monitor DTE Configuration |
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Passively monitor data and signals from the DTE while the DTE and DCE devices are communicating. Use this configuration
when you have one serial port on the PC running VCS Async II.
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Single Port Monitor DCE Configuration |
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Passively monitor data and signals from the DCE while the DTE and DCE devices are communicating. Use this configuration
when you have one serial ports on the PC running VCS Async II.
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Spy Mode Configuration |
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ViewComm Async II, in spy mode spies on a local serial port (on motherboard or plug-in add-on card). You can
choose any serial port that uses a physical UART and is available to Windows. The idea is to see the data
being sent and received, along with whatever signals are being used by the connection.
the same port that ViewComm is spying on may be used by other communications software. You will
see both Tx and Rx data. This configuration requires no cable connections for ViewComm. Thus (e.g.) a normal modem
cable can be connected to the port along with equipment under test.
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