The OptiX OSN 3500 Intelligent Optical Transmission System is a new-generation intelligent optical transmission system developed by Huawei Technologies. The system provides high-efficiency transmission of various services, such as SDH, PDH, Ethernet, ATM, DDN, and SAN, at the core layer and edge layer. By using packet switching technology the system can provide carrier-level QoS on the packet transport network.
Positioning
The OptiX OSN 3500 intelligent optical transmission system (the OptiX OSN 3500 for short) developed by Huawei is the next-generation intelligent optical transmission equipment. The OptiX OSN 3500 is of a “universal switch” architecture. That is, the OptiX OSN 3500 can be used in packet mode or in TDM mode. When used with the other equipment of Huawei, the OptiX OSN 3500 supports various networking applications, such as the pure packet mode application, hybrid networking application (overlay networking of the packet mode and TDM mode), and pure TDM mode application. By using a proper networking solution, the data service and conventional SDH service can be processed in the optimal manner.
Technology
The OptiX OSN 3500 transmits voice and data services on the same platform with high efficiency. It integrates the following technologies:
- In packet mode, the OptiX OSN 3500 supports the following technologies: In TDM mode, the OptiX OSN 3500 supports the following technologies:
- Multiprotocol Label Switching (MPLS)
- Multiprotocol Label Switching Transport Profile (MPLS-TP)
- Pseudo Wire Edge to Edge Emulation (ETH PWE3)
- TDM PWE3
- ATM PWE3
- In TDM mode, the OptiX OSN 3500 supports the following technologies:
- Synchronous digital hierarchy (SDH)
- Plesiochronous digital hierarchy (PDH)
- Ethernet
- Asynchronous transfer mode (ATM)
- Storage area network (SAN)/Video
- Wavelength division multiplexing (WDM)
- Digital data network (DDN)
Network Application
As shown in Figure 2, the OptiX OSN 3500 is mainly used at the convergence layer and backbone layer of the metropolitan area network (MAN). The network application scenarios are described as follows:
- In TDM networking, can be networked with the other OptiX transmission equipment (the OptiX OSN 9560, OptiX OSN 9500, OptiX OSN 7500 II, OptiX OSN 7500, OptiX OSN 3500 II, OptiX OSN 2500, OptiX OSN 1500, OptiX OSN 500, and OptiX OSN 550) to optimize the carrier’s investment.
- With the packet switching technology, can constitute a packet data transmission network with the other OptiX transmission equipment (the OptiX OSN 7500 II, OptiX OSN 7500, OptiX OSN 1500, OptiX OSN 500, OptiX OSN 550, OptiX PTN 910, OptiX PTN 950, OptiX PTN 1900, OptiX PTN 3900, and OptiX RTN 900) to meet the requirement for bearing IP services.
- Can be flexibly networked with WDM equipment and Metro equipment.
- Can transparently transmit services over third-party Layer 2 networks, allowing end-to-end configuration and management.
Features
- Universal Switch Architecture for Multiservice Grooming OptiX OSN equipment uses a universal switch architecture for unified grooming of packet services and TDM services. OptiX OSN equipment can work in packet mode, TDM mode, or dual-domain (packet+TDM) mode.
- Hierarchical OAM Facilitating Fault Detection The Hybrid MSTP equipment supports hierarchical OAM to rapidly detect and locate various faults, thereby improving network reliability. In addition, the Hybrid MSTP equipment supports distributed OAM and centralized OAM.
- TP-Assist Solution Facilitating the O&M of Packet Services Like the SDH equipment, Huawei Hybrid MSTP equipment supports a hierarchical operating & maintenance (O&M) system by using the TP-Assist solution, so packet services can be configured, commissioned, or maintained in an end-to-end manner.
- Built-In WDM, Flexible Networking The OptiX OSN equipment uses the built-in WDM technology to transmit several wavelengths over one optical fiber. In this manner, the OptiX OSN equipment can be interconnected with the WDM equipment.
Board Software
The board software runs on each board and it manages, monitors and controls the operation of the board. It receives the command issued from the NE software and reports the board status to the NE software through performance events and alarm. The specific functions include:
- Alarm management
- Performance management
- Configuration management
- Communication management
It directly controls the functional circuits in corresponding boards and implements ITU-T compliant specific functions of the NE.
Table 1 Maximum switching capacity of the OptiX OSN 3500
Board Maximum Switching Capacity Access Capacity of a Single Subrack
N1PSXCS 80 Gbit/s 60 Gbit/s
N2PSXCSA, N3PSXCSA 160 Gbit/s 100 Gbit/s
Table 2 Service types that the OptiX OSN 3500 supports
| Service Type | Description |
| SDH services | · Standard SDH services: STM-1/STM-4/STM-16/STM-64 · Standard SDH concatenated services: VC-4-4c/VC-4-8c/VC-4-16c/VC-4-64c/AU-3· Standard SDH virtual concatenation services: VC-4-Xv (X≤8), VC-3-Xv (X≤24), VC-12-Xv (X≤63) · SDH services with FEC: 10.709 Gbit/s, 2.666 Gbit/s |
| PDH services | · E1 (optical) service · E1 (electrical)/T1 service · E3/T3 service · E4 service |
| Ethernet services | · Ethernet private line (EPL) service · Ethernet virtual private line (EVPL) service · Ethernet private LAN (EPLAN) service · Ethernet virtual private LAN (EVPLAN) service |
| RPR services | · EVPL service · EVPLAN service |
| ATM services | · Constant bit rate (CBR) service · Real-time variable bite rate (rt-VBR) service · Non real-time variable bite rate (nrt-VBR) service · Unspecified bit rate (UBR) service |
| DDN services | · Nx64 kbit/s (N = 1-31) service · Framed E1 service |
| SAN services | · Fiber channel (FC) service · Fiber connection (FICON) service · Enterprise systems connection (ESCON) service |
| Video services | · Digital video broadcast-asynchronous serial interface (DVB-ASI) service · High definition-serial digital interface (HD-SDI) electrical service · Standard definition-serial digital interface (SD-SDI) electrical service |
Table 3 Power supply parameters
Item Specification
Power supply mode DC power supply
Nominal voltage -48 V or -60 V
Voltage range -38.4 V to -57.6 V or -48 V to -72 V
Maximum current 20 A/32 Aa/60 Ab
a: This value indicates the maximum current of the equipment when the enhanced subrack (1100 W) is used.
b: This value indicates the maximum current of the equipment when the type-III subrack is used.
Table 4 Climatic conditions for storage
Item Range
Altitude ≤ 4850 m
Air pressure 55 kPa to 106 kPa
Air temperature -40°C to +70°C
Rate of change of temperature ≤ 1 °C/min
Relative humidity 5% to 100%
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