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FAQ response
I am trying to connect an Adder KVM switch to a computer that requires an RS232 (9 pin D-type connector) mouse. I am using an old 'PS/2 to RS232 mouse adapter' but it doesn't seem to work. What am I doing wrong?
All Adder KVM switches can be connected to computers with PS/2 (6 pin mini-DIN connector) or RS232 (9 pin D-type connector) mouse connections. To connect to a computer with an RS232 mouse port, a 'PS/2 to RS232 mouse adapter' is fitted to the free end of the PS/2 mouse cable from the Adder KVM switch. Many mice that support PS/2 and RS232 communications use a similar system and are often supplied with adapters.
Problems arise because there is no standard for the wiring of the adapters and consequently an adapter that works with one manufacturer's mouse may not work with another. This is often confusing for users as the adapters look similar. To avoid compatibility problems it is advisable to use adapters that are sold specifically for use with Adder switches. Alternatively, if you have a multimeter, you can check the wiring of your adapter against the wiring information in the Adder KVM switch's manual. Most problems with RS232 mouse connections are related to incorrect adapter wiring.