DragonWave Pseudowire Solutions


Pseudowire Solutions

DragonWave’s pseudowire products enable cost-effective optimization of backhaul networks by supporting an economical and transparent transition to packet-based infrastructures. DragonWave’s pseudowire products provide significant advantages over native TDM for mixed traffic applications. A pseudowire approach offers greater efficiency, delivering up to 25 percent more T1/E1s per RF channel than the equivalent SONET/SDH approach, resulting in lower cost per T1/E1. Other benefits of pseudowire include:

  • True network convergence – avoids the need to manage the TDM connections at each intermediate network point;
  • Simplified operations and management – only one packet based network needs to be operated;
  • Future proofing – the network does not need to be changed as the traffic mix changes from TDM circuits to packet based traffic; and
  • Lower capital cost – the pass thru economics at the intermediate site and the virtual aggregation function of the DS3/OC3 units eliminates the need for distributed Add/Drop/Mux (ADM) or cross-connect boxes, taking cost out of the network.

Pseudowire Service Delivery Unit (SDU)

product-sdu-1DragonWave’s pseudowire Service Delivery Unit (SDU) provides a convenient, compact termination point for mixed TDM and Ethernet service. It combines Ethernet, up to 6 switched GbE ports (2 optical and 4 electrical) as well as pseudowire functionality into a single box.

There are three SDU options available:

  • SDU-16 – 16 port T1/E1 version;
  • SDU-DS3 – 2-port DS3 version, and
  • SDU-155 – an OC3/STM1 version.

Up to three SDUs can be put into a single Rack Unit (1RU) high slot and cascaded to provide as many ports as required. DragonWave’s SDU offers a solution to provide high capacity TDM transport and high capacity carrier Ethernet traffic over a single converged packet based network.

Features Include:

  • 16XT1/E1, 2xDS3, OC3/STM1 Ports,1RU High
  • Point-Point and Multi-Point Configurations;
  • User Settable efficiency/Delay;
  • User Settable Jitter Buffer;
  • Timing over Packet (AT&T TR-62411 & G.823 Jitter and Wander);
  • Remotely network manageable via CLI, SNMP v1/v2c/v3 or web management;
  • IETF PWE3, MEF circuit emulation compliant;
  • Transparent T1/E1 line extension over Ethernet (TDMoE);
  • Integrated Ethernet switch combines IP user payload and TDMoE channels with priority;
  • 4x 100/1000BaseT Ethernet ports + 2XOptical/Copper GigE Ports;
  • Supports full redundancy;
  • Stackable or cascadable;
  • Network timing protocol;
  • Table top or 19″ rack mountable; and
  • Compliant to Bellcore DSX-1 and G.703 standards for on-premise metallic interfaces and synchronization.


Unlike other emulators on the market which are capable of supporting only a few T1/E1 lines, the SDU-16 provides TDM over Ethernet Circuit Emulation for up to sixteen T1/E1 lines. The SDU-16 also provides switching capability for up to 6 GigE Ethernet ports which can all be used as data ports.

The DragonWave SDU-16 is designed primarily for use as a T1/E1 (TDM) delivery device when used in conjunction with the DragonWave SDU-DS3 or SDU-155 device.


The SDU-DS3 provides DS3 TDM over Ethernet capability, primarily targeted as a head-end unit to connect to multiple SDU-16s. This provides a low-cost single hand-off point for hub site. The SDU-DS3 has integrated cross-connect capability as well as comprehensive redundancy options. The SDU-DS3 can be used to provide Timing over Packet (ToP) to far-end SDU-16 units. SDU-DS3 product seamlessly transports TDM traffic over Ethernet enabling customers to easily migrate to native IP networks while still supporting legacy TDM services and meeting stringent synchronization requirements.


The SDU-155 provides STM1 or OC3 TDM over Ethernet capability, targeted primarily as a head-end unit to connect to multiple SDU-16s. This provides a low-cost single hand-off point for hub site. The SDU-155 has integrated cross-connect capability as well as extensive redundancy options. The SDU-155 can be used to provide Timing over Packet (ToP) to far-end SDU-16 units. The SDU-155 has 6 GigE ports, so it can be connected to multiple Horizon links without an intermediate Ethernet switch.