GSM EDGE Uplink Status Flag - USF 

Up to 8 GPRS connected devices can share a single packet data channel through the use of a 3-bit uplink state flag - USF. GPRS and EDGE mobile devices are assigned a temporary 3-bit USF code when they are connected to the system.

This figure shows how a single packet data channel can be shared by up to 8 simultaneous users. This diagram shows that each GPRS or EGPRS mobile device is identified by a 3-bit USF code. The system relates (maps) the USF code to a specific IP address it has assigned for each device.

   Enhanced Data Rates for Global Evolution - EDGE Books

more details

Introduction to GPRS and EDGE This book explains how the GSM system has been modified to provide GPRS, EDGE, and EGPRS packet data transmission rates up to 474 kbps. Described are the physical and logical channels and their functions and how GPRS systems can service more than 80 active users per GSM radio channel. $14.99 Printed, $11.99 eBook

   Add this Wireless Dictionary tool to your web site

In order to add this Wireless dictionary tool to your web site and give your visitors the way to lookup industry terms from more than 11,000 terms, acronyms, and definitions, just copy the HTML code below and put it into your web page where you want to provide access to your dictionary.