Vaisala WMS302 Guida Utente Pagina 35

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Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 33
Modem Module
The DMX501 modem module is used for providing long distance fixed
line connection between two Vaisala devices with a similar interface. It
is used when the distance is up to 10 km, for example, between MAWS
and Digital Display, or between Ceilometer CT25K and MAWS.
Through this I/O port, a remote location can send reports and data or the
host can poll them. The DMX501 modem module must be configured
before using it so that it works as desired.
0306-013
Figure 17 Modem Module DMX501
The DMX501 modem module supports the following communication
standards:
- V.21, 300 bps FSK
- V.23, 1200 / 75 bps FSK
- V.22, 1200 bps DPSK
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