2013 California Standards for Accessible Design Pocket Guide

[2010 ADAS] Advisory 707.6.2 Numeric Keys.  Telephone keypads and computer keyboards differ in one significant feature, ascending versus descending numerical order. Both types of keypads are acceptable, provided the computer-style keypad is organized similarly to the number pad located at the right on most computer keyboards, and does not resemble the line of numbers located above the computer keys