RS-232 Serial Cables

Discussion in 'Cables & Switches' started by Oblomov, Sep 18, 2007.

  1. Oblomov

    Oblomov
    Active Member

    Joined:
    Nov 21, 2004
    Messages:
    273
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Ratings:
    +8
    My Velodyne DD15 requires a RS-232 M/F Serial cable and the manual states that it should be the "mouse extension" rather than the "null modem" type. Can anybody tell me what the difference between the two cables is and how to identify them? I have a serial cable, supplied with my DVDO video processor, which I suspect is the correct type, but how can I tell?

    Apologies for the banal questions and thanks for your help.
    Regards,
    Oblomov
     
  2. dognosh

    dognosh
    Active Member

    Joined:
    Nov 24, 2006
    Messages:
    931
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    28
    Location:
    Somerset
    Ratings:
    +65
    I have worked in serial comms for over 12 years and have never heard of "mouse extension" :D

    looking it up on the net my guess is the ME cable is a direct pin to pin cable and also male one end and female at the other
     
  3. Oblomov

    Oblomov
    Active Member

    Joined:
    Nov 21, 2004
    Messages:
    273
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Ratings:
    +8
    Dognosh,

    Thanks for your input. I have found out that a null modem cable is reverse wired, whereas, as you suggest, an extension type cable has to be straight wired. Obvious, when you know! Both types can have a variety of M/F combinations though.

    What I still don't know is how to visually identify the two different cables. It is not too important, however, as I have been told by a knowledgeable member that the DVDO cable is straight wired.

    Thanks, Oblomov
     

Share This Page

Loading...