WiDEN
Wideband Integrated Digital Enhanced Network, or WiDEN, is a software upgrade developed by Motorola for its iDEN enhanced specialized mobile radio (or ESMR) wireless telephony protocol. WiDEN allows compatible subscriber units to communicate across four 25 kHz channels combined, for up to 100 kbit/s of bandwidth. The protocol is generally considered a 2.5G wireless cellular technology.
Read more about WiDEN: WiDEN History, WiDEN Subscriber Units, Capitalization and Pronunciation