Editing CdmaOne (section)

==Protocol revisions==
cdmaOne's technical history is reflective of both its birth as a Qualcomm internal project, and the world of then-unproven competing digital cellular standards under which it was developed. The '''term IS-95''' generically applies to the earlier set of protocol revisions, namely P_REV's one through five.

P_REV=1 was developed under an [[American National Standards Institute|ANSI]] standards process with documentation reference ''J-STD-008''. J-STD-008, published in 1995, was only defined for the then-new North American PCS band (Band Class 1, 1900&nbsp;MHz). The term ''IS-95'' properly refers to P_REV=1, developed under the [[Telecommunications Industry Association]] (TIA) standards process, for the North American cellular band (Band Class 0, 800&nbsp;MHz) under roughly the same time frame. IS-95 offered interoperation (including handoff) with the analog cellular network. For digital operation, IS-95 and J-STD-008 have most technical details in common. The immature style and structure of both documents are highly reflective of the "standardizing" of Qualcomm's internal project.

P_REV=2 is termed ''Interim Standard 95A (IS-95A)''. IS-95A was developed for Band Class 0 only, as in incremental improvement over IS-95 in the TIA standards process.

P_REV=3 is termed ''Technical Services Bulletin 74 (TSB-74)''. TSB-74 was the next incremental improvement over IS-95A in the TIA standards process.

P_REV=4 is termed ''Interim Standard 95B (IS-95B) Phase I'', and P_REV=5 is termed ''Interim Standard 95B (IS-95B) Phase II''. The IS-95B standards track provided for a merging of the TIA and ANSI standards tracks under the TIA, and was the first document that provided for interoperation of IS-95 mobile handsets in both band classes (dual-band operation). P_REV=4 was by far the most popular variant of IS-95, with P_REV=5 only seeing minimal uptake in South Korea.

P_REV=6 and beyond fall under the [[CDMA2000]] umbrella. Besides technical improvements, the IS-2000 documents are much more mature in terms of layout and content. They also provide backwards-compatibility to IS-95.