chadvicki 0 Posted October 10, 2009 I have a 1837 telephone entry system that has a fail on the rs-232 when I am testing it. Anyone know what may be wrong and how to fix it? Thank you, Chad Share this post Link to post Share on other sites
XperCam 0 Posted October 15, 2009 Try using an old fashion com port tester (in line with LEDs) and check if you may need a nul modem, its been a while since I install a door king system, Door king tech support was perry good last time I used them. Also make sure ALL the setting are exaclly the same on both ends (Baud rate stop biit...etc.) PS: I hate com ports on PC based systems with windows Share this post Link to post Share on other sites
