USB Expansion Card for Dell R710 Server

Posted on 2011-10-21
Last Modified: 2012-05-12
Hello.  I'm trying to plug in 4 of these:

Into a Dell R710 Server :

I'm using Linux.

When I plugin the timers to the provided USB ports in the front part of the server I'm only seeing one of the USB Sangoma Timers.

When I plug them into the back 2 USB ports, I can see both timers.

I believe the front ports are using a shared BUS.

Do you think if I purchase this card:

All (4) USB UT51 Sangoma Timers will show up as separate devices in linux?

Let me know if you have any questions by responding below.

Question by:Michin
    LVL 63

    Expert Comment

    Hard to know for sure, but chances are it will support at least 2 of the Timers, that and the 2 in the back should suffice.

    I hope this helps !
    LVL 30

    Expert Comment

    why dont you use ntp instead
    LVL 2

    Author Comment

    ntp isn't fast enough.  I'm dealing with very precise timing on these cards.
    LVL 30

    Expert Comment

    ntp presice enough is the ukl military use ntp on various projects I did a ntp test for them and it was nevere more than 2 seconds out
    ntp is connected to a atomic clock
    LVL 2

    Accepted Solution

    NTP is not granular enough.  This is internal clock timing for a phone system.   No answer found.
    LVL 2

    Author Closing Comment

    no other solution found

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