IEEE 802.3ak:2004 pdf free download

IEEE 802.3ak:2004 pdf free download.IEEE Standard for Information technology— Telecommunications and information exchange between systems一Local and metropolitan area networks— Specific requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD)Access Method and Physical Layer Specifications.
45.2.1.7.6 PMA/PMD extended abilities (1.8.9)
When read as a one. hi I .X.9 indicates that the extended abilities listed in register 1.11. When read as a zero. hit I ,M,9 indicates that the PMAPMI) ilne not have extended abilities.
45.2.1.8 lOG PMD transmit disable register (Register 1.9)
Change the first paragraph in 452.1.8 (inserted by IEEE Sid 802 Jae-2002) to read ax follows:
The assignment of bits in the lOG PMD transmit disable register is shown in Table 45—9. The transmit dis. able functionality is optional and a PMD’s ability to perform (he transmit disable functionality is advertised in the PMD transmit disable ability bit I .8.R. A PMD that does not implement the transmit disable function. ality shall ignore writes in the lOG PMD transmit disable register and may return a value of zero for all hits. A PMD device that operates using a single wavelength and has implemented the transmit disable function shall use bit 1,9.0 to control the function. Such devices shall ignore writes to bits I .9.4:1 and return a value of zero for those bits when the) are read. The transmit disable function for serial PMDs is described in 52.4.7. The transmit disable function for wide wavelength division multiplexing (WVDM) PMDs is described in 53.4.7. The transmit disable function for four-lane electrical PMDs is described in 545,6.
45.2.1.8.5 Global PMD transmit disable (1.9.0)
Change the (hi rd paragraph in 45.2.1.85 tinserted by IEEE Std SO2Jae-2002) It, read as follows:
For multiple wavelength lane PMD types. transmission will be disabled on all lanes when this bit is set to one. When this bit is set to zero, the lanes are individually controlled by their corresponding transmit disable bits 1.9.4:1.
45.2.1.9 lOG PMD receive signal detect register (Register 1.10)
Change the first paragraph in 452.! .9 (inserted by IEEE Std 802.3ae-2002) to read as follows:
The assignment of bits in the 1(X) PMI) receive signal detect register is shown in Table 45—10. 100 PMD receive signal detect register is mandatory. PMI) types that use only a single wavelength indicate the status of the receive signal detect using hit 1 .10.0 and return a value of zero for bits I .10.4:1. F’MI) types that use multiple wavelengths or lanes indicate the status of each lane in bits 1.10.4:1 and the logical ANI) of those hits in hit 1.10.0
45.2.1.9.5 Global PMD receive signal detect (1.10.0)
Change the third paragraph in 452.1 .95 (inserted by IEEE .Std 802 Jae-2002) to read as follows:
Multiple wavelength or multiple lane PMD types indicate the global status of the lane.hy.lane signal detect indications using this hit. This bit is read as a one when all the lane signal detect indications are one: otherwise, this bit is read as a zero.