IMI Gliding PDA cable 22 pin.
HP 38xx serie <-> RJ12.

Suitable for:
List of supported iPAQ PDA devices with 22-pin connector:
HP iPAQ h1910, h1915, h1920, h1930, h1935, h1937, h1940, h1945, h2210, h2215, h3830, h3835, h3850, h3870, h3875, h3950, h3955, h3970, h3975, h4140, h4150, h4350, h4355, h5150, h5155, h5450, h5455, h5550, h5555, hw6510, hw6515, hw6910, hw6915, hw6925, hw6940, hw6965, hx2190, hx2490, hx2495, hx2750, hx2790, hx2795, hx4700, hx4705, hx4710, rx1950, rx1955, rx3110, rx3115, rx3415, rx3417, rx3710, rx3715, rz1710, rz1715.