Synonyms for xgxs or Related words with xgxs
Examples of "xgxs"
The XGMII Extender supports the 10 Gbit/s data rate of the XGMII. The 10 Gbit/s MAC data stream is converted into four lanes at the XGMII (by the Reconciliation Sublayer for transmit or the PHY for receive). The byte stream of each lane is 8b/10b encoded by the
for transmission across the XAUI at a nominal rate of 3.125 gigabaud. The
at the PHY end of the XGMII Extender (PHY
) and the
at the RS end (DTE
) may operate on independent clocks.
The following is a list of the major concepts of
The purpose of the XGMII Extender, which is composed of an
(XGMII Extender Sublayer) at the MAC end, an
at the PHY end and a XAUI between them, is to extend the operational distance of the XGMII and to reduce the number of interface signals. Applications include extending the physical separation possible between MAC and PHY components in a 10 Gigabit Ethernet system distributed across a circuit board.
The XGMII Extender is transparent to the Reconciliation Sublayer and PHY device, and operates symmetrically with similar functions on the DTE transmit and receive data paths. The XGMII Extender is logically composed of two XGXSs interconnected with a XAUI data path in each direction. One
acts as the source to the XAUI data path in the DTE transmit path and as the destination in the receive path. The other
is the destination in the transmit path and source in the receive path. Each XAUI data path is composed of four serial lanes. All specifications for the XGMII Extender are written assuming conversion from XGMII to XAUI and back to XGMII, but other techniques may be employed provided that the result is that the XGMII Extender operates as if all specified conversions had been made. One example of this is the use of the optional XAUI with the 10GBASE-LX4 8b/10b PHY, where the
interfacing to the Reconciliation Sublayer provides the PCS and PMA functionality required by the PHY. An
layer is not required at the PHY end of the XAUI in this case. However, means may still be required to remove jitter introduced on the XAUI in order to meet PHY jitter requirements.
Optical modules are connected to a host by either a XAUI, XFI or SFI interface. XENPAK, X2, and XPAK modules use XAUI to connect to their hosts. XAUI (
) uses a four-lane data channel and is specified in IEEE 802.3 Clause 48. XFP modules use a XFI interface and SFP+ modules use an SFI interface. XFI and SFI use a single lane data channel and the 64b/66b encoding specified in IEEE 802.3 Clause 49.
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