Alcatel Lucent 1660SM OMSN (Optical Multi Service Node) series next-generation SDH equipment

Alcatel Lucent 1660SM OMSN (Optical Multi Service Node) series next-generation SDH equipment

Core advantages of the product

Completeness: OMSN product line covers all transmission scenarios from user side, urban area, land long-distance, and transoceanic submarine cables, with a complete solution.

Simplicity: The module reuse is extremely high, and a small number of hardware blocks are used to build various network topologies.

Facing the future: In addition to traditional SDH, it natively supports data service aggregation, exchange and forwarding, and is adapted to the IP era.

Backward compatibility: The optical layer, DCC channel, network management, and old devices are interconnected, and the existing network can be smoothly expanded and upgraded.

Cost advantage: Multiple devices share boards/racks, reducing spare parts inventory and personnel training costs, replacing multiple sets of equipment with a single device, and lowering TCO.

Unified management: Ethernet/ATM/SDH/WDM multi technology network, using a set of network management system.

Flexibility: 16 business slots, high configuration flexibility; The high-order cross matrix 384 × 384 STM-1 is equivalent, and the low order 256 × 256 STM-1 is equivalent (16128 VC12); A single unit can terminate up to 6 STM-16 rings, multiple SNCP rings, and 2 STM-64 level 2 fiber MS-Spring rings.

Reliability: Supports MSP linear multiplexing segment protection, MS-Spring bidirectional shared ring, SNCP subnet connection protection; The board, matrix, and power supply can all have 1+1 redundancy; DC-DC distributed power generation with no single point of failure.

Usability: Centralized control architecture, business cards without local processors; Support local/remote software downloads; The hardware is widely compatible with the OMSN family.

Openness: Supports color STM-16 optical ports, directly connected to WDM devices without the need for a repeater; Support AU-4 cascading and adapt to high bandwidth ATM/IP devices; Support SDH-SONET interoperability conversion.

Typical application scenarios

Metropolitan/local edge ring network;

Regional network backbone network;

Point to point link with intermediate add/drop/regeneration stations;

International gateway and cross-border business;

Ultra long distance transmission with integrated optical amplifier;

Urban edge nodes for multi business data.

Whole machine hardware subsystem

The whole machine is divided into seven subsystems: SDH VC cross connection subsystem, clock reference subsystem, equipment control subsystem, business port subsystem, ISA comprehensive business adaptation switching subsystem, integrated CWDM coarse wavelength division, auxiliary overhead subsystem, and power supply subsystem.

1. SDH Cross Connection Subsystem

Non blocking matrix, supporting any port crossing between AU-4, TU-3, and TU-12; Supports one-way point-to-point, two-way point-to-point, point to multipoint SNCP Drop‑Continue、MS‑SPRING Drop‑Continue。

Capacity: High order 384 × 384 STM-1, low order 256 × 256 STM-1; Supports cascaded signals of AU4-4C/AU4-16C/AU4-64C.

Protection: Supports SNCP-I intrinsic and SNCP-N non-invasive; MS‑SPRING； Configurable 1+1 matrix card redundancy; Protection mode supports recoverable/non recoverable.

Support 100% non-invasive path cost POM monitoring for high and low order VC.

2. Clock Reference Subsystem (SETS, compliant with ITU-T G.783)

Clock source options: STM-N optical line, 2Mb/s service port, external 2MHz/2.048Mb/s input, internal oscillator of the device.

Support SSM synchronization status messages, which can automatically select sources based on quality or priority, and also support manual source selection; Up to 6 candidate clock sources can be configured.

SETG clock generator has three working modes: lock, hold, and free oscillation. Maintain a maximum daily drift of 0.37 ppm in the mode; The local oscillator accuracy is 4.6 ppm.

Output: T0 internal system clock; Two external 2MHz and two external 2Mb/s clock outputs are sent to external network elements.

When the matrix is 1+1 redundant, the clock unit is synchronized with redundancy protection.

3. Equipment Control Subsystem (SEMF)

Two layer architecture:

EC device controller: DCC communication, database management, CT local terminal interface, PCMCIA flash storage configuration database, software package; Equipped with proxy forwarding, it can upload microwave and PDH equipment alarms/configurations attached to Q2/RQ2 interfaces to TMN network management through SDH-DCC.

SC rack controller, located on the matrix board: business configuration issuance, alarm collection, performance monitoring, automatic protection switching.

Communication bus: ISSB rack internal serial bus, ISPB rack internal parallel bus.

Supports up to 32 DCC channels; External interface: QB3 CMIP northbound interface, local Craft terminal; Compatible with Alcatel OMSN network management.

EC failure does not affect business flow and does not interrupt automatic protection switching. The protection function is independently operated by SC.

4. Business Port Subsystem (PDH/SDH Interface Board)

The maximum landing capacity of the rack is 378 channels of 2Mb/s signals.

Description of Board Type Capability

63 × 2Mb/s board G.703, each with 63 E1 channels; supports 75 Ω/120 Ω impedance; Support 2M rescheduling

3 × 34/45Mb/s board software switching between 34M or 45M (E3/T3)

The 4 × OC-3 board supports SONET OC-3, AU3/TU3 conversion, and maps SONET VC-3 to SDH VC-4

4 × 140M/STM-1 software selection: 140M electrical port or STM-1

4 × STM-1 electrical port, 4 × STM-1 optoelectronic hybrid short/long distance optical module optional

1 × STM-4 optical port, 4 × STM-1/4 SFP optical port SFP hot swappable

16 × STM-1 electrical access board for use with 4 × STM-1/4 motherboard

STM-16 Light Plate (Standard/Slim Lite) SFP; Color version directly connected to WDM; Slim version single slot, higher density

STM-64 light plate S-64.2B short distance, L-64.2B long distance with optical amplifier; Up to 4 STM-64 modules per rack

Optical interface support: short distance, long distance, JE ultra long distance; Built in optical preamplifier/optical power amplifier in the rack; STM-1/STM-16 supports single fiber bidirectional transmission.

5. ISA Integrated Business Adapter Subsystem (Data Business Core)

The ISA board implements Ethernet, ATM, and Packet Ring packet ring services, mapping data services into SDH virtual containers.

ISA Ethernet board

ISA-10/100Base-T: 11 10/100M electrical ports, with an expansion of access modules to 25; GFP mapping, supporting virtual cascading LCAS; Bandwidth shaping; 10/100M mapped to VC-12/VC-3/VC-4.

ISA Gigabit Ethernet Gigabit Board: 4 SFP Gigabit ports; Maximum backplane bandwidth enhancement slot 1.2G, ordinary slot 622M; GFP, virtual cascade LCAS。

ISA-PREA grouping ring edge aggregation board: L2 capability, MPLS， Aggregate multiple Ethernet streams with a switching capacity of 1.6Gbps.

ISA ATM card (3 specifications)

600M (single slot), enhanced 600M (single slot), 1200M (double slot); Support PVC hard and PNNI signaling soft PVC; CBR/VBR rt/nrt/UBR traffic; UPC/NPC traffic control; EPD/TPD/SCD congestion dropout; ATM OAM； The enhanced version supports IMA.

ISA ES Ethernet Switch Board (ES1/ES4/ES16): Layer 2 Switching, MPLS Martini， Support UNI/NNI, QoS, CIR/PIR service SLA; ES16 supports MPLS labels and DSCP deep flow classification.

ISA-PR packet ring card: maximum of 2 cards for the whole machine, with a switching capacity of 6.4Gbps; Based on Ethernet over MPLS; Provide E-Line and E-LAN layer 2 VPN services; Support three SLA levels: guaranteed, controlled, and best effort; Global congestion control.

6. Integrated CWDM coarse wavelength division module

STM-16 color SFP optical port, following the ITU-T G.694.2 wavelength grid (1470-1610 nm), does not require a repeater to directly connect to CWDM multiplexing and demultiplexing.

OADM add/drop multiplexing module (1 channel/2 channels); 8-channel MUX/DEMUX multiplexing and splitting.

Double multi rate forwarding unit: completes black and white light transmission ↔ Color CWDM wavelength conversion can also be used for optical electric optical regeneration; Supports multiple customer signals including FE/GE/FC/FDDI/STM-N.

4xANY board: Reuse 4 different customer signals into one 2.5G server channel.

7. Auxiliary expense subsystem

Complete processing of all overhead bytes (J0, B1, B2, K1/K2, DCC, EOW engineering service phone, J1, V5, etc.) for RSOH regeneration section, MSOH multiplexing section, VC-4/VC-3, VC-12. External auxiliary interfaces: 4 × V.11, 4 × RS-232, 4 × G.703 64k, 2 × G.703 2M; Support DTMF audio EOW service phone.

8. Power Supply Subsystem

Input DC: -48V~-60V;

Distributed DC-DC, each business board comes with its own DC-DC converter; A single power failure does not cause the entire machine to fail, and the natural power supply is redundant.

9. Physical rack

19 inch ETSI standard rack, dimensions: 482 mm wide x 650 mm high x 250 mm deep. The rack is divided into upper and lower parts:

Upper access area (21 slots): houses various access boards, optical amplifiers, CWDM modules;

Lower business area (20 slots): matrix board, EC controller, main business board.

Compliance and Standards

Adhere to the complete set of SDH standards such as ITU-T G.707 and G.783; Support GFP (G.7041), virtual cascading LCAS (G.7042)； ATM standards; MPLS； ETSI Electromagnetic Compatibility EMC.