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CFIP PhoeniX C Series TDM/IP Split Mount System Technical Description and Configuration Guide
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Rev. 1.0
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© SAF Tehnika JSC 2013
Block diagram of the CFIP Phoenix C Indoor Unit
The function of the Indoor unit is evident from the block diagram in Figure 4.
Figure 4: Block diagram of the Indoor Unit
CFIP Phoenix C IDU consists of two main boards. Interface Card performs the function of data
interface, packet processor and management unit. Modem Card performs the function of digital
modem (DSP) and analogue modem (analog front end with mixers and filters).
Data are first processed by integrated Six Port Gigabit Ethernet Switch, where two WAN ports of this
switch are connected into universal Packet Processor (PBPS – Priority Based Packet System). SFP
interfaces are also directly connected into universal Packet Processor. Function of Packet Processor
depends on selected design and it is described in the section which explains such particular designs.
Digital modem then adds synchronization marks, FEC to the data stream and creates a digitally
modulated signal, which is led to the block of analog signal processing. All these parts are
interconnected inside the device over high-speed bus and are operated from the central processor
unit CPU. This block (CPU) is also accessible via management interfaces and allows the user to perform
all the settings both locally and remotely trough the IP interface in the CFIP Phoenix C IDU.
The function of Packet Processor is specific in dependence on selected design. Generally, Packet
Processor uses priority scheme which ensures that data at the internal port ETH 4 are processed with
the highest priority whereas data at the internal port ETH 1 with the lowest priority.