A30808-X3247-L14-2-7618
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Information
Base Station System
Technical Description (TED:BSS)
BS-240/241
possible. The communication path from the LMT to the BCC is not affected, i.e., a
SW-download via the LMT is possible.
3.1.2 Core Satellite (COSA6P16)
The COSA6P16 board (COSA6P16) has the following characteristic:
– 6 PCM30/24-interfaces for Abis
– 16 CU-interfaces
The board is controlled from the COBA via the SAT-interface (satellite-interface; 32bit
data). Fig. 3.4 shows a block diagram of the COSA6P16:
Fig. 3.4 COSA6P16 Block Diagram
The key-element of the PCM-interfaces is the FALC (Framing and Line Interface
Component for PCM30 and PCM24). It has the following tasks:
– analogue receive and transmit circuitry for PCM30 and PCM24
– data- and clock-recovery
– frame alignment/synthesis
– line-supervision
– timing-adaptation to BISON
Data arriving from the Abis-Interface via a PCM-port can be switched non-blocking and
bitwise (8 kbit/s andnx8kbit/s data-rate possible) with the BISON to another PCM-Port
or via a SELIC to a CU.
The Route-Clocks of one FALC can be switched with the Route-Clock multiplexer to the
COBA for synchronization purposes. The COSA6P16 gets its working-clocks from the
COBA.
SELIC
BISON
OVPT
FALC54 for PCM30/24
&
PCMport5
PCMport6
Interfaces
to COBA
Real-Time BUS (Hopping)
Non-Real-Time BUS (O&M)
to
CUs
BISON
BUS
Route
Clocks
Route
Clock
Preselector
RCLK1-6
CLKX1-6
Working
Clocks
DC/DC
Converter
SAT-Interface
(32bit data)
SELIC
SELIC
SELIC
SELIC
SELIC
SELIC
SELIC
OVPT
FALC54 for PCM30/24
&
PCMport1
PCMport2
OVPT
FALC54 for PCM30/24
&
PCMport3
PCMport4
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