Organizationally Unique Identifier (OUI)
An OUI / "company_id" is a 24-bit globally unique assigned number referenced by various standards. The OUI is usually concatenated with 24 or 40 bits by an Organization to create a 48-bit or 64-bit number that is unique to a particular piece of hardware. The OUI can be used to create MAC Addresses, Bluetooth Device Addresses or Ethernet Addresses. There are other uses of the OUI as well, such as its use as a company identifier in the SNAP protocol.
Please review our Frequently Asked Questions and Tutorials for more information.
Individual Address Block (IAB)
An Individual Address Block is for people who need less than 4,097 unique 48-bit numbers (EUI-48) and thus find it hard to justify buying their own OUI. The IAB is a particular OUI belonging to the IEEE Registration Authority, concatenated with 12 additional IEEE-provided bits, leaving only 12 bits for the owner to assign to his (up to 4,096) individual devices. Please review our Frequently Asked Questions and Tutorials for more information.
OUI-36
An OUI-36 is a 36-bit identifier that can be used as an Individual Address Block or as an extended OUI. The OUI-36 may be appended with 4 organization-supplied bits to form a 40-bit Context Dependent Identifier (CDI-40), with 12 organization-supplied bits to form an EUI-48, or with organization-supplied 28 bits to form an EUI-64. Please review our Frequently Asked Questions and Tutorials for more information.
EtherType Field
The EtherType Field provides a context for interpretation of the data field of an Ethernet/802.3 data frame (protocol identification). Refer to IEEE Std 802.3, clause 3 and especially sub-clauses 3.1.1 and 3.2.6. See also IEEE Std 802 sub-clause 10.4. IEEE Standards 802 and 802.3 can be downloaded free of charge at the Get IEEE 802® web site.
Manufacturer ID
Within a 64-bit section of the 1451.4 TEDS, called basic TEDS, the manufacturer of the transducer is defined with a 14-bit code called the manufacturer ID, along with manufacturer-assigned transducer model number, model letter, model version nember and serial number. Please review our Frequently Asked Questions and Tutorials for more information.
Logical Link Control (LLC)
Logical link control (LLC) protocol data units (PDUs) contain addressing information. This addressing information consists of two fields; the Destination Service Access Point (DSAP) address field, and the Source Service Access Point (SSAP) address field. Please review our Tutorials for more information.
Universal Registration Number (URN)
The unique registration number is a 64-bit unique identifier contained in the memory devices, or nodes, in which IEEE 1451.4 TEDS data is stored. Because multiple nodes may be arrayed in a multi-drop network format, to allow memory capacity to be increased, or other functions to be added, the URN allows a number of nodes to be individually accessed by the system. Please review our Frequently Asked Questions and Tutorials for more information.
IEEE Template
A template is a documented definition of the placement and significance of each piece of data stored within the TEDS memory. (see IEEE Std 1451.4.2004 subclause 5.3) The template is not contained within the TEDS data, but the TEDS data identifies which template is to be referenced in interpreting the TEDS data. Templates must be accessible to the program code, which is used to write and read the TEDS data, allowing that data to be properly packed for writing and unpacked subsequent to reading. Please review our Frequently Asked Questions and Tutorials for more information.
TDL Item
The TDL is a formal language similar to programming languages, but with considerably less looping and conditional control. This is because the entire purpose of the language is to map bits and not to implement general processing or mathematical capabilities. Please review our Frequently Asked Questions and Tutorials for more information.
PSID
The Provider service Identifier (PSID) is a four-byte numeric string used by the IEEE 1609™ set of standards to identify a particular application service provider that announces that it is providing a service to potential users of an application or service. Please review our Frequently Asked Questions and Tutorials for more information.
IEEE 802.16 Operator ID
An OpID is a 24-bit number that, per IEEE Std 802.16, is broadcast by each base station as part of its Base Station ID. An 802.16 network consists of one or more base stations operating as a coordinated system, with each base station in the coordinated network broadcasting the same OpID. Please review our Frequently Asked Questions and Tutorials for more information
