User's Manual Part 1

1.3 Britecell Plus Features

The following lines report a brief summary of Britecell Plus main features:

• multiband 2G, 2.5G and 3G – 802.11b WLAN compatible: Britecell Plus is completely

transparent to any transmission protocol and modulation format, and it can distribute any 2G,

2.5G, 3G wireless standard. In addition, a special option allows to carry also the WLAN

(802.11b/g) service over the same infrastructure;

• modular configuration for flexible design: by properly setting some parameters like the

amount of RUs and the antenna locations, the Britecell Plus architecture can follow the

environment specific features in order to obtain the most effective radio-coverage of the

indoor area. The modularity of the system allows easy modifications for future growth and

increasing traffic;

• easy to install: the intelligent plug & play Britecell Plus system includes an Automatic Gain

Control (AGC), that eliminates system gain variations regardless of optical loss. This avoids

the need for field adjustments, thus reducing design, installation and optimization time.

• low-power consumption: establishing a “quasi line-of-sight propagation” towards all

mobile phones inside the area, Britecell Plus works with extremely low power levels. Low

power levels have two great advantages: 1) allow mobile phones to work at lower power

levels, thus limiting the radiated emissions and increasing their battery life; 2) allow a better

control of interference effects between adiacent cells.

• central supervision functions: all individual alarms of Britecell Plus system are stored in an

internal flash memory, and available to both local and remote connections. Detailed alarm

information is provided by special software (i.e. by Supervision or Maintenance software

tools) running on a locally connected host, as well as any information about alarm status and

alarm history is available to remote connections via TCP/IP protocols, SNMP agent, or

HTTP servers. This alarm information is visible also by means of LEDs present on the front

panels of both the MU and the RUs;

• multiple-carriers system: there are no restrictions on the number of carriers that the

Britecell Plus can convey. Obviously, the more carriers per service, the less power per

carrier;

• remote power supply: in case mains cannot be used for the Remote Units, Britecell Plus

offers a centralised power supply option, which distributes both a DC low-voltage (- 48)

power and the optical signals through a composite fibre optic/copper cable;

• wide variety of RF passive devices: the connections between the DAS and the local BTSs

can be arranged so as to get the best fit for customers needs. Britecell Plus equipment

provides RF splitters/combiners, multi-band duplexer/triplexer, attenuators, couplers for

UL/DL paths, thus allowing the maximum design flexibility

• high reliability: the MTBF (Mean Time Between Failure) is estimated to be 300000 hours.

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