Lantronix SESPM1040-541-LT Series, Инструкция по установке, Страница: 63 / 64

Lantronix SESPM1040-541-LT-xx Install Guide
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RP-SMA
(Reverse Polarity SMA) is a variation of the SMA connector which reverses the gender of the interface.
The term “reverse polarity” refers only to the gender of the connector’s contact pin and not to the signal
polarity.
SMA (Sub-Miniature Version A) are coaxial RF connectors. SMA connectors are coaxial RF connectors developed
in the 1960s as a minimal connector interface for coaxial cable with a screw type coupling mechanism. The SMA
connector has a 50 Ω impeda nce. It offers excellent electrical performance from DC to 18 GHz.
Tag Types
are contactless cards based on currently available products capable of storing NDEF (NFC Data
Exchange Formatted) data. See the NFC Forum for Tag 4 information.
From IEEE P802.3bt/D3.7 Sept 2018 :
Ampacity : the maximum current, in ampere, that a conductor can carry continuously under the conditions of
use without exceeding its temperature rating.
Dual-signature PD
: A PD that has independent detection signatures, class signatures, and maintains power
signatures on each pairset.
Link section : the portion of the link between the PSE Power Interface (PI) and the PD PI.
Pairset : Either of two valid 4-conductor connections, Alternative A or Alternative B, as listed in IEEE 802.3,
145.2.4. The PSE Alternative A and Alternative B connections are referred to as Mode A and Mode B,
respectively, at the PD.
Power Sourcing Equipment (PSE)
: A DTE or midspan device that provides power to a single link section which
may also carry data.
Single-signature PD : A PD that simultaneously shares the same detection signature, class signature, and
maintains power signature between both pairsets.
Type 1 PD : A PD that requests Class 0 to Class 3 during Physical Layer classification and that is not a PoDL PD.
Type 1 PSE : A PSE that supports Class 0 to Class 3 power levels and provides power over 2 pairs.
Type 2 PD : A PD that requests Class 4 during Physical Layer classification, supports 2-Event Classification, and
supports Data Link Layer classification.
Type 2 PSE : A PSE that supports Class 0 to Class 4 power levels and provides power over 2 pairs.
Type 3 PD : A single-signature PD that requests Class 1 to Class 6, or a dual-signature PD that requests Class 1 to
Class 4 on both Modes, during Physical Layer classification. Additionally, the PD implements Multiple-Event
classification, and accepts power on both Modes simultaneously.
Type 3 PSE : A PSE that supports up to Class 6 power levels, supports short MPs, and may support 4-pair power.
Type 4 PD : A single-signature PD that requests Class 7 or Class 8, or a dual-signature PD that requests Class 5 on
at least one Mode during Physical Layer classification. Additionally, the PD implements Multiple-Event
classification, is capable of Data Link Layer classification, and accepts power on both Modes simultaneously.
Type 4 PSE : A PSE that supports at least Class 7 power levels, in addition to lower PD Classes, short MPS, and 4-
pair power.