Siemens EWSD

Extend the life of your Siemens EWSD system with Carritech’s expert support services—trusted solutions that keep your legacy infrastructure running smoothly and cost-effectively.

About the Siemens EWSD

With more than 200 million ports installed in over one hundred countries worldwide, the EWSD was most recently marketed under the Nokia Siemens Networks brand and many of its parts are now discontinued.

Key Features of the Siemens EWSD

The Siemens EWSD core is comprised of the:

  • Switching Network (SN) – Creates the connections between subscribers.
  • Coordination Processor (CP) – Performs call processing and routing. As a multiprocessor, the CP can be extended to meet all performance requirements. When operating at maximum capacity, the CP113 can handle up to 16 million Busy Hour Call Attempts (BHCA).
  • Signaling System Network Control (SSNC) – Controls the SS7 signaling Traffic supporting SS7 over TDM, SS7 over ATM and also SS7 over IP.

Technical Information

The Siemens EWSD periphery is comprised of the following:

  • Remote Switching Unit (RSU) – Connects subscribers and trunks; can replace local exchanges
  • Line Trunk Group (LTG) – Connects subscribers and trunks. These are some different types of LTG’s:
    • LTG(M): GSMYAA, GSMYDC, GPLSx, DIU120, PMUx, GPLC, etc.
    • LTG(N): GPNYx, GPNLx, etc.
    • LTG(P): GPPYx, GPSx, etc.

 

Digital Line Unit (DLU) – Connects subscribers and concentrates the traffic to the LTG. These are some different types of DLU’s:

  • DLU(A): SLMA:COS, SLMA:CMRL.
  • DLU(B): SLMA:FPE, DLUS30, ALEX, SLMD:QFB.
  • DLU(G): SLMA:ITM, SLMA:ITF, SLMD:QFB, SLMI:xxx, etc.

 

The DLU can be re-used as an integral part of the Siemens NGN SURPASS access solution:

  • Synchronous Transport Module Interface (STMI) – Provides a fully integrated STM-1 interface to the SDH network. It can be used to interconnect switches as well as to connect RSUs or RDLUs to the switch.
  • Host Timeslot Interchange (HTI) – For connection of the RSU.

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We have thousands of Siemens EWSD parts in stock.

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Remote technical support is available for Siemens EWSD products

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We repair Siemens EWSD parts.

Learn more about the Siemens EWSD

Explore the background, key features, specifications, and technical background of the Alcatel 1000 E10. Learn how it fits into modern and legacy network environments, its typical use cases, and how we support it through repair, maintenance, and spare part services. Whether you’re operating an active system or managing a transition, you’ll find everything you need to know right here.

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