Contents
3 System Functions 3-1
3.1 Structure of Functional Units 3-1
3.2 Functional Units 3-3
3.2.1 SDH Interface Unit 3-3
3.2.2 Ethernet Interface Unit 3-4
3.2.3 Cross-Connect Unit 3-4
3.2.4 Synchronous Timing Unit and Clock Interface Unit 3-5
3.2.5 System Control and Communication Unit 3-5
3.2.6 Control and Communication Unit 3-5
3.2.7 Orderwire Processing Unit 3-5
3.2.8 BA/PA Unit 3-5
3.2.9 Dispersion Compensation Unit 3-5
3.2.10 Power Interface Unit 3-6
3.2.11 Key Power Backup Unit 3-6
3.2.12 EMP Unit 3-6
3.3 System Protection Function 3-7
3.3.1 Equipment Protection 3-7
3.3.2 Network Protection 3-8
3.3.3 Clock Synchronization Protection 3-11
3.4 On-Line Upgrade of Unit Functions 3-13
Figures
Figure 3-1 Functional structure of the OptiX OSN 9500 3-2
Figure 3-2 Fiber-shared virtual path protection 3-11
Figure 3-3 Fiber-shared virtual path protection 3-11
Tables
Table 3-1 SDH interface unit 3-3
Table 3-2 Comparison among GXCH, EXCH and GXCL 3-4
Table 3-3 SSM encoding mode 3-12
This chapter covers an introduction to the functional structure, protection and online upgrade functions of the OptiX OSN 9500.
3.1 Structure of Functional Units
Figure 3-1 shows the functional structure of the OptiX OSN 9500.
Figure 3-1 Functional structure of the OptiX OSN 9500
3.2 Functional Units
3.2.1 SDH Interface Unit
The OptiX OSN 9500 provides SDH interfaces including STM-64, STM-16, STM-4, STM-1 optical interface and STM-1 electrical interface. Table 3-1 shows these boards and their indices.
The STM-64 synchronous optical interface unit receives/transmits one channel of STM-64 optical signals through the JL64 board. The maximum transmission distance of JL64 is 60 km. Combined with the JBA2/JBPA board and JDCU board, the JL64 board enables a repeaterless transmission distance of up to 120 km.
The STM-16 interface unit is realized by the JL16/JD16/JQ16/JO16 board which respectively access 1, 2, 4, 8-channel STM-16 optical signals.
The STM-4/STM-1 interface unit is realized by the JH41 board which accesses 16-channel STM-4 or STM-1 optical signals (STM-4 or STM-1 is configured as the actual requirement). The JLQ4 board can access 4-channel STM-4 optical signals, the JLH1 16-channel STM-1 optical signals, and JLHE board can access 16-channel STM-1 electrical signals.
Table 3-1 SDH interface unit
|
Level |
Board name |
Optical interface type |
|
STM-64 optical interface unit |
JL64 |
I-64.1, S-64.2b, Le-64.2, L-64.2b, V-64.2b and 100G EA |
|
STM-16 optical interface unit |
JO16 |
I-16, S-16.1, L-16.1 and L-16.2 |
|
JQ16 |
I-16, S-16.1, L-16.1 and L-16.2 |
|
|
JD16 |
I-16, S-16.1, L-16.1, L-16.2, Le-16.2, V-16.2 and U-16.2 |
|
|
JL16 |
I-16, S-16.1, L-16.1 and L-16.2 |
|
|
STM-4 optical interface unit |
JLQ4 |
S-4.1 |
|
JH41 |
S-4.1 |
|
|
STM-1 optical interface unit |
S-1.1 |
|
|
JLH1 |
S-1.1 |
3.2.2 Ethernet Interface Unit
The OptiX OSN 9500 provides the GE06 board for Gigabit Ethernet signal processing. It supports link access procedure-SDH (LAPS), point-to-point protocol (PPP) and generic framing procedure (GFP) protocols, and supports Ethernet transparent transmission and point-to-point service connection. This unit features the following functions:
n Accesses six channels of Gigabit Ethernet (GE) signals.
n Supports transmission mode of 1000BASE-LX/1000BASE-SX.
n Supports point-to-point Ethernet transparent transmission of GE-to-GE service.
n Controls the data flow.
n Supports PPP, LAPS (X.85 or X.86) and GFP-F framing protocol.
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