The serial port on a Tatung TWN-5213 CU tablet computer. The hinged plastic cover of the port is marked "RESET/RS232C". Below the cover is a mating connector, a Hirose 3540-16P-CV. The smallest increment on the scale is 1 mm; the connector is approximately 20 mm wide. Numbering of contacts as seen above in the 3560-16S. 2 4 6 ... 12 14 16 1 3 5 ... 11 13 15 Resistance in ohms measured from each contact to the metal frame. 1 12 k 2 infinity 3 4 k 4 infinity 5 infinity 6 infinity 7 infinity 8 0 9 4 k 10 4 k 11 4 k 12 4 k 13 infinity 14 infinity 15 infinity 16 0