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FM-531HD / May 2013
F M - 5 3 1 H D P R O G U I
The FM-531HD and Internet Security Concerns
The FM‑531HD does not act as a “web device” or “web server,” nor does it sup‑
port open ports to the Internet. Therefore there is no worry that someone could “hack”
into the FM‑531HD and use it as a pathway to the rest of the network to which it is
connected.
About DHCP and The FM-531HD
The FM‑531HD does not utilize DHCP – Dynamic Host Configuration Protocol
(or automatically assigned network addressing) – and needs to be assigned a “STATIC”
network‑unique IP address. Most DHCP servers assign addresses starting at the bottom
of the group 192.168.0.xxx. Therefore choosing an address high in that group, say
192.168.0.200, as a static IP address will likely keep it out of the way of the busiest
DHCP addressing.
However, it’s always wise to check with your local friendly network administra‑
tor to determine what static IP address is open and safe to use. Sometimes the local
network warrants the “Subnet” and “Gateway” values to be vastly different, but our
suggested starting values for the Subnet and for the Gateway should suffice for all but
the most complex situations.
The FM-531HD Ports and Network Protocols
The FM‑531HD uses both TCP/IP and UDP protocols to communicate with the
remote GUI. TCP/IP is used from the GUI to the FM‑531HD because its high reli‑
ability ensures that control changes sent to the FM‑531HD will be received. UDP
is used from the FM‑531HD to send and update metering and other real time data.
TCP/IP uses port 55900, while UDP uses port 60001, and, if 60001 is busy, tries the
next highest port until an idle one is found. Both TCP/IP and UDP ports must be open
for any firewall based connectivity.
Summary of Contents for FM-531 HD
Page 2: ...Technical Manual Wheatstone Corporation May 2013 FM HD Digital Audio Processor FM 531hd...
Page 122: ...page A 2 FM 531HD May 2013 A P P E N D I C E S Appendix A General Specifications A 3 Contents...
Page 128: ...page A 8 FM 531HD May 2013 A P P E N D I C E S Appendix B FM 531HD GPI Interface A 9 Contents...
