Handbook

Table Of Contents
ClearFill Star CDMA
1100187 Rev. 1.0
Page 13 of 152
2 ClearFill®Star System Description
2.1 General description
In order to leverage the commonly available data network infrastructure, ClearFill®Star uses
the same local area network (LAN) topology.
A LAN in a typical office building is laid out in a tree topology. The base of the tree is the
main telecommunication/equipment room with the Ethernet switches and routers. It usually
accommodates the connection to the outside world. From this central location network cables
(fiber or CAT5) branch to multiple telecommunication/equipment closets located throughout
the building. The telecom closets that are spread over the building are connected as the last
level of branches. They connect each individual location that needs network access with
CAT5 cables The telecom closets are usually located so close that the longest CAT5 cable is
less than 100 m (300 ft) long in order to support 1000Base-T Ethernet. An example is
illustrated in Figure 2.
Figure 2 Typical deployment topology of a ClearFill®Star network
This topology is also used for ClearFill®Star. The base station (BTS) is usually located in the
main telecom room. A base station interface (BSI) card connects to the BTS.
Fiber or CAT-5 cables connect the BSI to multiple Gigabit Ethernet switches (GESs),
installed in wiring closets all over the building. These switches are connected by CAT-5
cables to the individual remote radio heads (RRHs), installed at desired locations throughout