Figure 1 below shows the signals from the UART that are connected to the .DB-9 connector pinouts for serial, VGA, EGA, CGA and more!. Everything should survive.485/RS-422 and half-duplex RS-485 on a single DB-9 connector. Note that if this is accidentally connected to a telephone, then one telephone wire is grounded, and TXD and RXD are no connect. It is not known whether this is any type of standard. DB9 to RJ11 From 1 is a interface for RS-232 from DB-9S (Female) to RJ11 to telephone cable to RJ11 to DB-9P (Male). Available in Any Length! OM4 Multimode 50/125 10/40/100 Gig 4-Strand Fiber Cable *FOM4. Choose Color, Jacket Type (Riser, Plenum or LSZH), Connectors and Optional Pulling Eye. All our DB9 RS-232 Serial Cables are available in custom length. Db9 connector diagram Our DB9 Straight-thru product line offers fully shielded cables in both PVC and Plenum Rated jackets.
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