Download Technical Manual-Architecture & Principle

Technical Manual - Architecture & Principle
U-SYS SoftX3000 SoftSwitch System
Switch
Meaning
Used to select whether
the shell of the E1
receiving cable of the
EPII is connected to the
protection ground.
S2
Used to select whether
the shell of the E1
transmitting cable of the
EPII is connected to the
protection ground.
S3
Chapter 2 Introduction to Boards
Switch choice
75-ohm coaxial cable: switch “ON” indicates that the shell of the
E1 receiving cable of the EPII is connected to the protection
ground.
The default status is “ON”.
120-ohm coaxial cable: switch “OFF” indicates that the shell of
the E1 receiving cable of the EPII is not connected to the
protection ground.
75-ohm coaxial cable: switch “ON” indicates that the shell of the
E1 transmitting cable of the EPII is connected to the protection
ground.
The default status is “ON”.
120-ohm coaxial cable: switch “OFF” indicates that the shell of
the E1 transmitting cable of the EPII is not connected to the
protection ground.
S4
Board reset switch
None
S5
Used for commissioning
and testing
None
2.5.5 Configuration Calculation
The number of EPIIs is equal to the number of FCSUs.
2.6 IFMI
2.6.1 Functions
The IP Forward Module (IFMI) boards are the front boards in basic frame 0 and basic
frame 1, and used together with the back board PFII in pairs. The IFMI is used to
receive and transmit IP packets, process Media Access Control (MAC) layer
messages, distribute IP messages and provide IP interfaces together with the BFII.
The alarm information generated by the IFMI is reported to the SMUI through the
shared resource bus.
The IFMIs work in active/standby mode.
2.6.2 Technical Specifications
The technical specifications of IFMI covers three aspects:
z
Functions
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