cdmaOne: The Family of IS-95 CDMA Technologies
cdmaOne describes a complete wireless system based on the TIA/EIA IS-95 CDMA standard, including IS-95A and IS-95B revisions. It represents the end-to-end wireless system and all the necessary specifications that govern its operation. cdmaOne provides a family of related services including cellular, PCS and fixed wireless (wireless local loop).

IS-95A: The first CDMA cellular standard
TIA/EIA IS-95 (Telecommunications Industry Association / Electronic Industries Association Interim Standard - 95) was first published in July 1993. The IS-95A revision was published in May 1995 and is the basis for many of the commercial 2G CDMA systems around the world. IS-95A describes the structure of the wideband 1.25 MHz CDMA channels, power control, call processing, hand-offs, and registration techniques for system operation. In addition to voice services, many IS-95A operators provide circuit-switched data connections at 14.4 kbps. IS-95A was first deployed in September 1995 by Hutchison (HK).

IS-95B: 2.5G
The IS-95B revision, also termed TIA/EIA-95, combines IS-95A, ANSI-J-STD-008 and TSB-74 into a single document. The ANSI-J-STD-008 specification, published in 1995, defines a compatibility standard for 1.8 to 2.0 GHz CDMA PCS systems. TSB-74 describes interaction between IS-95A and CDMA PCS systems that conform to ANSI-J-STD-008. Many operators that have commercialized IS-95B systems offer 64 kbps packet-switched data, in addition to voice services. Due to the data speeds IS-95B is capable of reaching, it is categorized as a 2.5G technology. cdmaOne IS-95B was first deployed in September 1999 in Korea and has since been adopted by operators in Japan and Peru.

Please visit the TIA website for more information on CDMA standards.

2G - cdmaOne Advantages
When implemented in a cellular network, cdmaOne technology offers numerous benefits to the cellular operators and their subscribers:

1. Capacity increases of 8 to 10 times that of an AMPS analog system and 4 to 5 times that of a GSM system
2. Improved call quality, with better and more consistent sound as compared to AMPS systems
3. Simplified system planning through the use of the same frequency in every sector of every cell
4. Enhanced privacy
5. Improved coverage characteristics, allowing for the possibility of fewer cell sites
6. Increased talk time for portables
7. Bandwidth on demand

2G - cdmaOne Deployments
cdmaOne is the fastest growing 2G wireless technology reaching 100 million subscribers after only six years of commercial deployment.

cdmaOne Network diagram

cdmaOne Roaming
Roaming is a key functionality for wireless systems and cdmaOne offers many advantages to enable roaming.

cdmaOne Logo
cdmaOne is a brand name, trademarked and reserved for the exclusive use of CDG member companies. Non-CDG member companies, please contact the CDG for information on licensing the cdmaOne trademark from the CDG for use on products. Member companies may download the cdmaOne logo in the Members Only section.

CDMA2000 1X is an ITU-approved, IMT-2000 (3G) standard that was the first 3G technology to be commercially deployed (October 2000).