[f-nsp] 1G speed-duplex concept FESX

[spenserhuang at aptg.com.tw]

Dear Sir:

The following is the information you have asked. My experience is to set FESX-424/448 1000BaseT as 1000-Full-slave if the peer device has no MASTER-SLAVE option.

Auto-Negotiation is performed as part of the initial set-up of the link, and allows the PHYs at each end to advertise their capabilities (speed, PHY type, half or full duplex) and to automatically select the operating mode for communication on the link. Auto-negotiation signaling is used for the following two primary purposes for 1000BASE-T:

*	To negotiate that the PHY is capable of supporting 1000BASE-T half duplex or full duplex transmission. 

*	To determine the MASTER-SLAVE relationship between the PHYs at each end of the link. 1000BASE-T MASTER PHY is from a local source. The SLAVE PHY uses loop timing where the clock is recovered from the received data stream

 

Regards,

Spenser.

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/foundry-nsp/attachments/20081209/5d532ddf/attachment.html>