[time-nuts] PTPv2 grandmaster with a Z3805A?

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Aug 21 06:49:57 UTC 2013


In message <CAHyFsx=5NhAUw_=Xm=YaSPLU=+0aG5DXGkpwwhcRdMJk+D61Pw at mail.gmail.com>
, Wojciech Owczarek writes:

>> support for timing electrical signals
>> using the same free-running counter as used for the PTP packets.
>
>Sounds interesting. Can you elaborate? Does the card then run its own clock?

Yes, it has a free running counter and can timestamp packets received
and transmitted (if they match a particular filter) and timestamp
(and possibly generate) external signals as well.

Read the datasheet...

>or other dedicated timing NICs? What makes it stand out so much - is it
>just that
>it supports all that's needed without being marketed as a precision timing
>NIC?

Price.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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