1. EIA/TIA IS-54 (Revision B), Cellular system dual-mode mobile station-Base station compatibility standard (1992).
2. EIA/TIA IS-95, Mobile station-Base station compatibility standard for dual-mode wideband spread spectrum cellular system (1993).
3. EIA/TIA IS-41 (Revision C), Cellular radio-telecommunications intersystem operations (1995).
4. ETSI, European telecommunications standards institute GSM recommendations.
5. CDPD Forum, CDPD system specification, Rel. 1.1 (1995).