The "AT Commands.pdf" file that ships on the has incorrect information concerning the S29 register. The document states:

"The S29 register sets the length of time, in units of 10 milliseconds, that the modem will go on-hook when it encounters the flash (!) dial modifier in the dial string. The range of values for this register is 0-255. The default is 70."

Making changes to the value does not actually change the delay--regardless of the value set, the delay seems about the same.

Products affected:

• iMac
• Power Macintosh G3 (Blue and White)

Although the register will accept values within the range described, and appears to save them properly, the actual delay time does not seem affected. Stringing multiple "!" characters together is suggested as a workaround when the default setting of 70 (700 milliseconds) is not enough.