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A30808-X3247-L14-2-7618
Technical Description (TED:BSS)
BS-240/241
Information
Base Station System
The architecture of BS-240/241 provides maximum flexibility to develop large and small
BTSs.
The BS-240/241 mainly consists of:
– carrier oriented boards called carrier unit (CU),
– core boards (COSA, COBA) and
– combining equipment
Up to 8 PCM lines can be connected to the core boards. In order to provide cost effective
solutions, the core boards are scalable (COBA, COSA). In addition, also the BTS itself
is scalable. It is possible to connect up to 2 Extension Racks to a Base Rack.
The main communication between the modules is provided by means of bi-directional
serial link communications between the carrier units (CU) and the core boards. The
serial link also provides an effective means to realize baseband frequency hopping.
Despite the fact that synchronization information is also transported via the serial links,
no differential length constraints apply for the lines of the serial link.
All alarms, beside the alarms that are generated in the core and in the CU boards, are
transported via the CAN bus. Alarms of the CU boards are transmitted via CC-Link. Core
boards use their interface bus.
The carrier unit(s) provide all analog and digital signal processing including a RF power
stage necessary to process a single carrier (e.g., GSM 8 TCHs). The carrier unit(s) inter-
face with the combining equipment on the one side and with the core modules on the
other. The core boards provide functions common to all carriers within the BS-240/241
(e.g., clock generation, O&M processing,...) as well as LAPD processing for the different
carriers.
AC/DC AC/DC converter DCBCTRL DC and Battery Controller
ACP AC Panel DCP DC Panel
ACTC Alarm Collection Terminal Connection module DIAMCO DI(2) Amplifier Multi Coupler
ACTM Optional Alarm Collection Terminal for Master Rack DUAMCO Duplex Amplifier Multicoupler
ACTP Alarm Collection Terminal for Slave Rack FICOM Filter Combiner
CAN Controller Area Network HPDU High Power Duplexer
COBA Core Basis (COBA2P8) LE Link Equipment
COSA Core Satellite (COSA6P16) TMA Tower Mounted Amplifier
CU Carrier Unit
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