>The NetLink Wireless Telephone System (NetLink WTS) combines
>Voice-over-IP (VoIP) and wireless LAN technologies, allowing mobile
>workers to make and receive telephone calls over a shared wireless
>infrastructure.
900Mhz TDMA cells: http://www.computertelephony.com/accolades/ct/MOBICEL.htm
>What makes Mobicel unique is its DCTS-900 Business Wireless
>Communications System. The DCTS-900 acts like an in-building
>cellular system with up to seven digital micro-cells, connecting
>handsets on the premises. It needs no control box.
>The compact digital (TDMA) wireless handsets communicate with each
>other via DCUs (Digital Cell Units). The DCTS-900 system operates in
>the unlicensed 900MHz ISM band. Each handset has a 3x10 display,
>side-mounted volume and mute controls and headset jack. Handset talk
>time is over 10 hours and standby time exceeds seven days. No other
>wireless telephone comes close, that I know of.
dual mode cellular-PCS and cordless phones:
http://www.lucent.com/press/1097/971001.cpab.html
>Wireless Telephones
>Operating at 800 Megahertz (MHz) in both digital and analog cellular
>modes, as well as in digital PCS in the 1.9 Gigahertz (GHz) band
>being used in new PCS networks, the versatile Philips Digital
>Cellular/PCS Telephone 6735 also offers exceptional ease of use.
>Features include Caller ID, Call Waiting, voice mail notification
>and short message service, displayed on the highly legible,
>four-line display. Available in the United States in the fourth
>quarter of 1997.