IEEE Std 802.3cc pdf free download

IEEE Std 802.3cc pdf free download.Ethernet Amendment 1 1: Physical Layer and Management Parameters for Serial 25 Gb/s Ethernet Operation Over Single-Mode Fiber.
105. Introduction to 25 GbIs networks
105.1 Overview
105.1.1 Scope
Change the first paragraph of 105.1.1 (‘as inserted kr IEEE Std 802.3hy-2016 and niodijied by IEEE Std 802.3hq-201 6) as follows:
25 Gigabit Ethernet uses the IEEE 802.3 MAC sublayer, connected through a 25 Gigabit Media Independent
Interface (25GM11) to Physical Layer entities such as 25GBASE-CR, 25GBASE-CR-S, 25GBASE-KR.
25GBASE-KR-S, 25GBASE-SR, and 25GBASE-T. 25GBASE-LR, and 25GBASE-ER.
105.1.2 Relationship of 25 Gigabit Ethernet to the ISO OSI reference model
Change item c) of 105.1.2 (as inserted by IEEE Std 802.3hr-2016) as follows:
a) The Media Dependent Interface (MDI) as specified in Clause 110 for 25GBASE-CR and 25GBASE-CR-S, in Clause 111 for 25GBASE-KR and 25GBASE-KR-S, er—in Clause 112 for
25GBASE-SR, or in Clause 114 for 25GBASE-LR and 25GBASE-ER uses a single-lane data path.
105.1.3 Nomenclature
Change the second paragraph of 105.1.3 (as inserted by IEEE Sid 802.3b -2016 asfidlows:
The term 25GBASE-R refers to a specific family of Physical Layer implementations based upon the 64B/66B data coding method specified in Clause 107. The 25GBASE-R family is composed of
25GBASE-CR, 25GBASE-CR-S, 25GBASE-KR, 25GBASE-KR-S, and 25GBASE-SR. 25GBASE-LR, and 25GBASE-ER.
108. Reed-Solomon Forward Error Correction (RS-FEC) sublayer for
25GBASE-R PHYs
108.5 Functions within the 25GBASE-R RS-FEC sublayer
108.5.3 Receive function
108.5.3.2 Reed-Solomon decoder
Change the third paragraph of 108.5.3.2 (as added hr IEEE Std 802.3bi’-2016, asfillows:
The Reed-Solomon decoder may provide the option to perform error detection without error correction to reduce the delay contributed by the 25GBASE-R RS-FEC sublayer. The presence of this option is indicated by the assertion of the FECbypasscorrection_ability variable (see 108.6.4). When the option is provided, it is enabled by the assertion of the FEC_bypasscorrection_enable variable (see 108.6. 1). This option shall not be used when the 25GBASE-R RS-FEC sublayer is used to form part of a 25GBASE-SR 25GBASE-LR, or 25GBA SE-ER PRY.
114.5.2 PMD transmit function
The PMD transmit function shall convert the bit stream requested by the PMD service interface messages PMD:IS_UNITDATA.request into an optical signal stream. The optical signal stream shall then be delivered to the MDI, all according to the transmit optical specifications in this clause. The higher optical power level in the signal stream shall correspond to tx_bit = one.
114.5.3 PMD receive function
The PMD receive function shall convert the optical signal stream received from the MDI into a bit stream for delivery to the PMD service interface using the messages PMD:IS_UNITDATA.indication, all according to the receive optical specifications in this clause. The higher optical power level in the signal stream shall correspond to rx_bit = one.
114.5.4 PMD global signal detect function
The PMD global signal detect function shall report the state of SIGNAL_DETECT via the PMD service interface. The SIGNAL_DETECT parameter is signaled continuously, while the PMD:IS_SIGNAL.indication message is generated when a change in the value of SIGNAL_DETECT occurs. The SIGNAL_DETECT parameter defined in this clause maps to the SIGNAL_OK parameter in the inter-sublayer service interface primitives defined in 105.4.
SIGNAL_DETECT shall be the indicator of the presence of the optical signal. The value of the SIGNAL_DETECT parameter shall be generated according to the conditions defined in Table I 14—4. The PMD receiver is not required to verify whether a compliant 25GBASE-R signal is being received. This standard imposes no response time requirements on the generation of the SIGNAL_DETECT parameter.IEEE Std 802.3cc pdf download.