Huawei OptiX OSN 3500 SDH PDH ATM DDN SAN Optical Transmission equipment

The OptiX OSN 3500 Intelligent Optical Transmission System is a new-generation intelligent optical transmission system developed by Huawei Technologies.


Huawei OptiX OSN 3500 SDH PDH ATM DDN SAN Optical Transmission equipment

 Product Description


The OptiX OSN 3500 II intelligent optical transmission system (hereinafter referred to as the OptiX OSN 3500 II) developed by Huawei is the next-generation intelligent optical transmission equipment.

The OptiX OSN 3500 II transmits voice and data services on the same platform with high efficiency. It integrates the following technologies:

  • Synchronous digital hierarchy (SDH)
  • Plesiochronous digital hierarchy (PDH)
  • Ethernet
  • Resilient packet ring (RPR)
  • Asynchronous transfer mode (ATM)
  • Storage area network (SAN)
  • Wavelength division multiplexing (WDM)
  • Digital data network (DDN)
  • Automatically switched optical network (ASON)
  • Microwave Technology 


  Table 1 Types of services supported by the OptiX OSN 3500 II

Service Type Description
SDH services
  • Standard SDH services: STM-1/STM-4/STM-16/STM-64
  • Standard SDH contiguous concatenation services: VC-4-4c/VC-4-8c/VC-4-16c/VC-4-64c/AU-3
  • Standard SDH virtual concatenation services: VC-4-Xv (X≤64), VC-3-Xv (X≤192), VC-12-Xv (X≤63)
  • SDH services with FEC: 10.709 Gbit/s, 2.666 Gbit/s
PDH services
  • E1/T1 service
  • E3/T3 service
  • E4 service

With the E13/M13 function, the equipment can perform multiplexing and demultiplexing between E1/T1 signals and E3/T3 signals.

Ethernet services

Ethernet service transmission on the platforms of Ethernet over SDH (EoS) and Ethernet over PDH (EoP)

  • 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 bit rate (rt-VBR) service
  • Non real-time variable bit rate (nrt-VBR) service
  • Unspecified bit rate (UBR) service
  • Unspecified bit rate plus (UBR+) service
DDN services
  • N x 64 kbit/s (N=1-31) service
  • Framed E1 service



Detailed Images






OptiX OSN 3500

System Features

Subrack dimensions

498mm(W) X 287mm (D)X 700mm (H)

Switching capacity

Packet: 100 Gbit/s. TDM: 200 Gbit/s (high order), 20 Gbit/s (low order)

Service slots

15 slots for processing boards and 16 slots for interface boards

Highly reliable design

1+1 hot backup for power supply modules
1+1 hot backup for system control boards
1+1 hot backup for cross-connect and synchronous timing boards
Redundancy protection for fan modules

Supported interfaces

Packet transport interfaces

E1, STM-1, FE/GE/10GE

MSTP interfaces

STM-64/16/4/1, E1/E3/E4/T1/T3, FE/GE/10GE, DDN, IMA/ATM, SAN

WDM interfaces

40-channel DWDM interfaces, compliant with ITU-T G.694.1
8-channel CWDM interfaces, compliant with ITU-T G.694.2

Power Supply

48V DC; 110/220V AC (External module)

Operation Environment

Temperature Relative Humidity
Long term: 0°C to 45°C 10% to 90%
Short term: –5°C to 55°C 5% to 95%

Packet Transport Features

Service features

E-Line and E-LAN
TDM PWE3: CESoPSN and SAToP, compression of idle timeslots
Broadcast packet suppression

QoS features

H-QoS scheduling and traffic shaping
DiffServ mode based on traffic classification
Simple traffic classification, complex traffic classification, per hop behavior (PHB), and ACL
Committed access rate (CAR)
PQ scheduling priority, weighted fair queuing (WFQ), and PQ+WFQ queuing
Tail drop and weighted random early detection (WRED)
Eight priority queues
Shaping based on port scheduling priority

Hardware-based OAM


Supports both LSP OAM and PW OAM:
CV (Connectivity Verification)
FFD (Fast Failure Detection)
FDI (Forward Defect Indicator)
BDI (Backward Defect Indicator)

Ethernet OAM

ETH-CC (continuity check), ETH-loopback, ETH-link trace
Remote loopback, remote fault detection

RMON (RFC 2819)
MAC/PHY loopback

Carrier-class protection

1+1 and 1:1 Linear MSP, guaranteeing 50 ms switching time
1+1 and 1:1 protection for label switched path (LSP) and pseudo-wire (PW), guaranteeing 50 ms switching time
Multi-section pseudo-wire (MS-PW)
Link aggregation group (LAG) protection
Multi-chassis link aggregation group (MC-LAG) protection
Dual-homing protection

Clock synchronization

Two external clock inputs/outputs (2 MHz or 2 Mbit/s)
Two external time signals (1 pps+TOD)
Adaptive clock recovery (ACR)
Synchronous Ethernet
IEEE 1588v2

MSTP Features


Electrical interfaces: DDN (V.35/V.24/X.21/RS-449/RS-530/RS-530A), E1/T1, E3/T3, E4, STM-1(E), 10/100BASE-TX, 1000BASE-T
Optical interfaces:
- Ethernet 100base-FX, 1000BASE-SX/LX/ZX, 10GBASE-LR/LW
- STM-1 S-1.1, L-1.1, L-1.2 
- STM-4 S-4.1, L-4.1, L-4.2
- STM-16 I-16, S-16.1, L-16.1, L-16.2, V-16.2, U-16.2 
- STM-64 I-64.2, S-64.2, L-64.2b, P1L1-2D2, V-64.2
- 40-channel DWDM interfaces (FEC off band), compliant with ITU-T G.694.1
- 8-channel CWDM interfaces, compliant with ITU-T G.694.2

Carrier-class protection

Mesh Protection and restoration (ASON)
-Distributed restorable rerouting protection
-Five dedicated protection scheme levels based on different SLA: Diamond, Gold, Silver, Copper and Iron
SDH Network Protection
2/4 fiber MS-SP Ring, 1+1 or 1:n (n<=14) linear MSP, SNCP/SNCMP/SNCTP;, fiber shared virtual path protection, fiber shared MS-SP Ring (one optical interface can support 2 groups of MS-SP Rings), DNI (ITU-T G.842)
Service Protection
Electrical Interface Protection
1:n tributary protection for E1/T1, E3/T3, E4, STM-1(e), and FE

Multi-service Transport Features

Ethernet Over SDH
- L2 switch, 64 aggregation directions for powerful Ethernet convergence
- Mapping granularity, VC-12-nv/VC-3-nv, and VC-4-nv
- Point-to-point LPT, point-to-multi-point LPT
- MPLS and stackable VLAN for L2 VPN 
- 4/8-level CoS, CAR based on 64K granularity
- IEEE 802.3ah, 802.1ag
- Automatic topology discovery
- 3-level CoS, A (A0/A1) / B (B-CIR/B-EIR) / C
- Steering/Wrapping/Steering + Wrapping protection scheme guarantee 50ms switching
- Spatial reuse of bandwidth with fairness algorithm
- Integrated MPLS with RPR to provide VLL/VPLS service
- Support 2M, 34M, 155M, 622M ATM, and IMA E1
- Support up to 93 IMA group and 189 E1s
- Support DDN (Nx64K) and framed E1


Table 2 Service interfaces of the OptiX OSN 3500 II.

Interface Type Description
SDH service interface

STM-1 electrical interfaces: SMB connectors and SAA connectors

STM-1 optical interfaces: I-1, Ie-1, S-1.1, L-1.1, L-1.2, Ve-1.2

STM-4 optical interfaces: I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

STM-16 optical interfaces: I-16, S-16.1, L-16.1, L-16.2, L-16.2Je, V-16.2Je, U-16.2Je

STM-16 optical interfaces (FEC): Ue-16.2c, Ue-16.2d, Ue-16.2f

STM-64 optical interfaces: I-64.1, I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b, P1L1-2D2

STM-64 optical interfaces (FEC): Ue-64.2c, Ue-64.2d, Ue-64.2e

STM-16 and STM-64 optical interfaces that comply with ITU-T G.692 can output fixed wavelength from 191.1 THz to 196.0 THz, and can directly be interconnected with the WDM equipment.

PDH service interface

75/120-ohm E1 electrical interfaces: DB44 connectors

100-ohm T1 electrical interfaces: DB44 connectors

75-ohm E3, T3 and E4 electrical interfaces: SMB connectors

Ethernet service interface 10/100BASE-TX, 100BASE-ZX, 100BASE-VX, 100BASE-LX, 100BASE-FX, 1000BASE-VX, 1000BASE-SX, 1000BASE-LX, 1000BASE-ZX, 1000BASE-T, 10GBASE-LW, 10GBASE-LR
DDN service interface

RS449, EIA530, EIA530-A, V.35, V.24, X.21, and framed E1 interface

ATM service interface

STM-1 ATM optical interfaces: Ie-1, S-1.1, L-1.1, L-1.2, Ve-1.2

STM-4 ATM optical interfaces: S-4.1, L-4.1, L-4.2, Ve-4.2

E3 interfaces: E3 services are accessed by the E3 board

IMA E1 interfaces: IMA E1 services are accessed by the E1 board

Storage area network (SAN)/Video service interface FC100, FICON, FC200, ESCON, or DVB-ASI service optical interfaces



Product Features


  • 1 Capacity
    The capacity covers the cross-connect capacity, slot access capacity and microwave capacity.
  • 2 Service
    The supported services are SDH services, PDH services and many other services.
  • 3 Interface
    The interfaces include service interfaces, administration and auxiliary interfaces.
  • 4 Networking Topology
    The OptiX OSN 3500 II supports topologies such as chain, ring, tangent rings, intersecting rings, ring with chain, dual node interconnection (DNI), hub, and mesh at the STM-1/STM-4/STM-16/STM-64 level.
  • 5 Protection
    The equipment provides equipment level protection and network level protection.
  • 6 Board REG Function
    The OptiX OSN 3500 II supports the REG function.
  • 7 ASON Features
    The OptiX OSN 3500 II provides a set of stand-alone ASON software system to realize the intelligent management of services and bandwidth resources.
  • 8 Built-in WDM Technology
    The equipment supports a built-in WDM technology, which enables the transmission of several wavelengths in one fiber.
  • 9 Microwave Technology
    The OptiX OSN 3500 II supports the built-in microwave boards of intermediate frequency. It can work with the outdoor unit (ODU) of the OptiX RTN 600 to achieve wireless service transmission.
  • 10 Access of AC Power Supply
    An uninterrupted power module (UPM) system supports the access of the 110 V/220 V power, and converts 110 V/220 V AC power into -48 V DC power to supply power to the equipment.
  • 11 Synchronization
    The The OptiX OSN 3500 II only supports the traditional clock synchronization.
  • 12 OAM Information Interworking
    The OptiX OSN supports OAM information interworking.
  • 13 OAM
    The OptiX OSN 3500 II provides the OAM functions at the equipment layer and network layer.
  • 14 License
    The product of this version is released with a license. That is, customers can obtain corresponding rights committed by the supplier based on the license certificate.
  • 15 Security Management
    The NMS uses many schemes to ensure the security of the 3500 II NE.