Specifications

Enhanced Base Transceiver System
iDEN® System
August 08, 2000 68P81095E55-E 2-3
Enhanced Base Transceiver System
Physical Components
In the iDEN system, the base station radios and associated control equipment are
contained in the Enhanced Base Transceiver System (EBTS) or, more commonly,
cell sites. The EBTS provides the Radio Frequency link between the land network
and the MSs. The Base Radios (BRs) perform the communications with the MSs,
sending both the control information and the compressed speech over a radio
channel. EBTS components (Figure 2-2) are rack-mounted. A standard
configuration is recommended, but an EBTS can be configured with different
equipment to tailor the performance.
Figure 2-2 Enhanced Base Transceiver System (typical).
The EBTS site consists of:
• an Access Control Gateway (ACG), which is either an integrated Site
Controller (iSC) or the aging, VME platform
• one or more Base Radios (BRs)
• an RF Distribution System (RFDS) (hybrid or cavity)
• a site synchronization Global Positioning System (GPS) receiver
• a Local Area Network (LAN) interface
Motorola does not typically supply:
• the site antennas
• the site to infrastructure transport facilities