If DU is true, we should dial an ACU whose type is AT. The phone numbers are in PN, and the call unit is in CU.

SunCGI REFERENCE MANUAL, Rev. A, 9 May 1988, PN 800-1786-10 SunOS 4.0 Example E-4.1, page 149. -SunCGI REFERENCE MANUAL, Rev. A, 9 May 1988, PN 800-1786-10 SunOS 4.0 Example E-4.1, page 149.

CDMA中PN,Walsh码应用及调制解调的仿真实现()