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|    sci.electronics.design    |    Electronic circuit design    |    143,326 messages    |
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|    Message 142,039 of 143,326    |
|    Don Y to All    |
|    Connector-less connections?    |
|    09 Jan 26 07:45:49    |
      From: blockedofcourse@foo.invalid              A typical installation, for me, requires 100-500 CAT5e drops.       I'd prefer to have "local talent" do this (licensed electricians on       a job site) but the consensus is they are woefully underqualified       for anything more than grunt work: stringing wire. Certainly       not qualified to install, configure and troubleshoot anything       more advanced than a doorbell!              So, I'll have to find other folks to actually connect the devices       to PRESTRUNG cable and bring the system up (much easier to do when       actually connecting the devices as they are still accessible at       that time so you can interact with them AS you are connecting them!)              But, you'd like to defer this until after the walls are in place.       Maybe even *after* the sale (so this can be priced as an add-on option,       treating the cables' prior installation as overhead).              However, you don't want to discover that one or more cables are       toast as opening the walls to replace them is REALLY costly!              Ideally, I'd like to be able to test/qualify each cable before       that point. But, would like to avoid having to attach 8P8C's to       each end JUST to connect a test set. The 8P8C's would then have       to later be removed (cut off) and discarded by the installer.              [So, you're paying to have them attached to the cable ends SOLELY       for the purpose of ringing out the cable!]              Ideally, I'd like to be able to "connect" to the cables without       attaching a connector.              And obvious solution would be to strip the ends of each conductor       and insert them into a temporary connector (built into test set)       just for the duration of the test. But, stripping 8 conductors       also adds labor (many hundred times over).              So, I'm thinking of an IDC connector (ideally reusable but likely       not practical) so the conductors could be quickly connected for       the test. Then, the connector removed (cut off!) and discarded       after the cable is qualified.              As the connector is disposable, there's no need for it to be pinned       "correctly"; the test set could sort out HOW *this* instance is       pinned and adapt itself to that configuration for the duration       of THAT test.              This burdens the tester with that additional capability. But, saves       labor costs by allowing relatively unskilled people to install and       test those cables.              Make sense?              The two questions are:       - is there a "reusable" IDC fixture that could provide this       connection as part of the tester (without having to incur the       cost of consumables)?       - any potential risks in this approach (besides ensuring that       the testing is done after the possibility of any cable damage       has passed)?              Bonus question: any way to check the cable without piercing the       insulation on each end?              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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