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Null Modem: DB9 Male or Female ?

Discussion in 'Sun Hardware' started by dotyet, Dec 20, 2004.

  1. dotyet

    dotyet Guest

    Hi Everyone,

    I am yet to receive my Sun Ultra5 machine. I was looking for null modem
    cables for connecting this machine to my PC.

    On the PC end, I have a DB9 male serial port (One with Pins).
    Any idea, What could be the serial port type on the Sun machine - a DB9
    male or female?

    I am getting a DB9 female to female null modem cable here in my area.

    One more question, is there anyway I could use a Standard PC based PS/2
    Keyboard and mouse with this Sun machine?

    Thanks in advance,
    dotyet, Dec 20, 2004
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  2. port B use a db-9 male connector, just like a PC, so your cable will
    work there. port A use a female db-25, but with a DTE pinout, just
    like most Sun systems with db-25:s.

    Are you going to use the PC a sa console to the sun? If so you should
    probably use port A, as that is the default if you don't connect a

    Thomas Tornblom, Dec 20, 2004
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  3. The DB9 is a nice car manufactured by Aston Martin. What you have
    on the PC is a DE9P (D shell, size E, 9 pins).
    The U5 serial port A is a DB25S (D shell, size B, 25 sockets).
    The U5 serial port B is a DE9P (D shell, size E, 9 pins).

    Serial port A:
    < http://docs.sun.com/app/docs/doc/805-7763-12/6j7a690v7?a=view >
    Serial port B:
    < http://docs.sun.com/app/docs/doc/805-7763-12/6j7a690v8?a=view >

    If you want to use the PC as a serial console then you need to use
    serial port A.

    More information about the U5 can be found here:
    The U5 keyboard/mouse connector is standard RS232 protocol using TTL
    standard signalling levels. The PC PS/2 keyboard and mouse connectors
    are a proprietary protocol. They are not compatible. There are
    converter boxes on the market that sits between the Sun machine and the
    PS/2 keyboard and PS/2 mouse. Examples is the APSSUN on
    < http://www.raritan.com/products/access_periph/conv_emul_adpt/prd_line.aspx?currpg=prd_line >
    and this one < http://www.compuplus.com/insidepage.php3?id=1001066 >.
    Goran Larsson, Dec 20, 2004
  4. dotyet

    dotyet Guest

    thanks to all of you for your inputs.

    dotyet, Dec 21, 2004
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