RE: [lwip-users] Question about PHY transceivers

[bonny gijzen]

Hi Timmy,

>You cannot implement standard gigabit Ethernet without a PHY.
>Simple LVDS transmitters/receivers are not compatible with gigabit
Ethernet CAT5-6 signaling.

We are trying to do the exact oposite. We don't want ethernet, just a
highspeed connection.
So why not use a standard cat5-6 system using a PHY, instead of using
lvds transceivers etc.


Bonny,


-----Oorspronkelijk bericht-----
Van: address@hidden
[mailto:address@hidden Namens
Timmy Brolin
Verzonden: zondag 4 november 2007 20:48
Aan: Mailing list for lwIP users
Onderwerp: Re: [lwip-users] Question about PHY transceivers

You cannot implement standard gigabit Ethernet without a PHY.
Simple LVDS transmitters/receivers are not compatible with gigabit
Ethernet CAT5-6 signaling.

/Timmy

bonny gijzen wrote:

>Hi guys,
>
>
>The question I have is not a true LWIP question, but it is hardware 
>related (PHY transceivers), so I guess you all have experience with 
>them.
>
>I have used LWIP in the past for a personal project, so I follow this 
>mailing list since, so I decided to raise my question here (if that is 
>no problem to you all).
>
>We are currently looking at the idea to add a (CAT5-6) gigabit 
>sender/receiver to our (FPGA) boards.
>We think using a PHY transceiver gives more benefits over LDVS 
>transmitters, because:
>
>*) Most PHY transceivers I've looked at use a single 25Mhz osc
>*) Have all encoding (4b5b e.o.) done inside
>*) Have embedded functions like polarity correction, adaptive 
>equaliztion, cross-talk cancellation, echo cancelation, timing recovery

>and error correction.
>
>These are some of the features which are embedded in the devices, so we

>do not need to bother with them ourselves.
>
>Do any of you use PHY transceivers (not MAC devices) on your boards?
>What are your experiences with them?
>What prices must I think of in unit terms of 1000 pcs annual?
>
>
>Thank you for maintaining LWIP,
>
>
>Bonny
>
>
>_______________________________________________
>lwip-users mailing list
>address@hidden
>http://lists.nongnu.org/mailman/listinfo/lwip-users
> 
>
>  
>


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