== Voltages ==
 
== Voltages ==
   −
RS232 specification says that the voltages may be ±25V, however ±5 V, ±10 V, ±12 V, and ±15 V are all common.
+
RS232 specification says that the voltages may be -7V - +12V.
   −
A 1 is represented as -3V to -25V
+
A 1 is represented as Positive Voltages (B-A > +200 mV)
   Exception encountered, of type "Error"