User's Manual

QDBS–Broadband Hardware Overview
NOTE: All photos in this document are for illustrative purposes only and may not
depict your actual system configuration.
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2.2. System architecture
The QDBS–Broadband complies with the CDMA2000 1xEV-DO Rev. A (EV-DO) per TIA/EIA-
856-A air interface standard and operates over 1900 MHz (PCS band). The QDBS–Broadband
supports broadband packet data (with rates of up to 3.1 Mb/s in the forward link and 1.8 Mb/s in
the reverse). The QDBS–Broadband supports CDMA devices such as commercial-off-the-shelf
(COTS) cellular phones and data cards.
The QDBS–Broadband leverages a packet-switched architecture that uses an Internet Protocol (IP)
suite for routing and transporting signaling and traffic packets among the subsystems. With this
architecture, the QDBS–Broadband can exploit the open interface and the ubiquitous availability of
IP connectivity, which results in faster application development and lower-cost system deployment.
The QDBS–Broadband can operate as a private, isolated network for packet data access. The
QDBS–Broadband is scalable to meet various capacity demands, from a single-sector network in
low capacity scenarios to a complex multiple-sector network in high-capacity scenarios.
Additional call capacity and area coverage is achieved by deploying a Three Sector Expansion Kit for
the Radio Case, or by adding Radio Cases. The use of additional Radio Cases is described in Section
5 of this document.
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80-D9001-1 Rev. A