62 NETLink
®
Ethernet Products
hexadecimal notation. Example: 08-FF-FA-9C-ED-5A
Master Is an active station that is permitted to transmit data and request data from
other stations, when it holds the token
MDI /
MDI-X
Auto
Makes it possible to identify if a cross over or a straight cable is connected and
configures the port accordingly.
Midspan
Midspan devices are also installed between a none-PoE-compatible switch and a
PD as injector for PoE supply. This type of device must be powered from the
16-digit Siemens identification number
MPI Multipoint Interface. Interface that is used for S7-300 and S7-400 systems and
that supports baud rates up to 1.5 Mbps
NAT Network Address Translation is the collective term for procedures for replacing
address information in data packets by other address information in an
automated and transparent way. This is very useful when connecting private
networks via a public line.
Network
rules
Network rules determine how the different data packets are handled in a
network device. For example, data packets are blocked or forwarded to or from
Omni-An-
tenne:
A rod-shaped antenna that radiates equally in all directions. They are usually
intended for the use in buildings or outside and radiate the building in all
OPC Object Linking and Embedding for Process Control allows data transfer between
applications of different producers, for example, using the RFC1006 protocol
Open/Non
e:
Authentication according to the "Open/None" method without the exchange of
authentication data in the WEP encoding mode. Is said to be safer than
„Shared“, since the key of the latter can be extracted by “sniffing”
Panel-An-
A usually flat antenna that radiates strongest in the respective direction. They
are usually used where a big distance has to be bypassed
Passphrase: Describes a character set that can be used to save data from hackers in the
encoding mode. Here the characters A-Z, a-z as well as 0-9 and the ASCII
digits
33-126 can be used without hesitation
PAT Port address translation. Used when multiple private IP addresses of a LAN need
to be translated into one public IP address
PD Acronym for “Powered Device,” a device that consumes energy as per the PoE
PG socket The programming unit socket of the bus connector allows further bus nodes to
Phantom
In PoE a technique used in 1000Base-T Ethernet to distribute power over the
same wires as are used to transport data
PoE/PoEpl
Two different performance classes in Power over Ethernet IEEE 802.3af (POE)
Port These are address components that are used in network protocols to assign the
correct protocols to data segments, also using port forwarding.
Port For-
The passing on of requests to ports via a network.
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