Black Box Network Services Db9 Serial Extension Cable Male/Female

hey everyone today we're checking out our serial cable tester you know I love cereal it's on all my dev boards on every dev board I've ever seen any product that I've ever seen so inevitably you have a ton of serial cables lying around the office now obviously you can look at them and decide if they're male or female no problem but what you can't see in most cases is are they straight through cables or null modem why are they not labeled I've only seen one cable ever labeled null modem the rest is kind of a mystery the other thing you can't see is are all the connectors intact Wow we have wasted an immense amount of time with the wrong cable or broken cable an embarrassingly a long amount of time we needed to stop doing that so we came out with an ultra simple easy way to test serial cables let's check it out okay so this device is really really straightforward let's start at the back h