The {manufacturer} {model} {pn} represents one item of our extensive telecommunications portfolio, which includes products from many of the world’s key OEM’s, including Ericsson, Siemens, Nortel, Nokia and Marconi. If you are looking for other parts in addition to the {pn}, then please contact us by telephone, email or add the request to our contact form, so that we are able to assist with your complete requirements.

Carritech specialise in {manufacturer} {model} and we hold a large amount of items in stock. We can provide the part number that your are looking for ({pn}) from stock and ship to most worldwide destinations.

Product Information

The EWSD Platform consists of the core and the periphery.

The 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.

The 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:


Warranty & Shipping

All our equipment is refurbished and the {manufacturer} {model} {pn} is backed up with a comprehensive warranty from Carritech. Our products, including the {pn} you have searched for, are sent in brand new packaging to ensure they arrive in the best possible condition.

Carritech can help with your {manufacturer} {model} requirements and hold a significant amount of {model} in stock. We should be able to provide the part number that you are looking for ({pn}) and ship to most worldwide destinations.

Our shipping partners include:


About Carritech

Carritech was founded in 2010 by a highly skilled management team, with over 40 years of combined industry experience within the carrier industry. We work with telecommunication service providers and major organisations around the world, helping them to prolong the life of their networks and reduce the costs involved in network management and maintenance.

Our broad range of services allow us to offer our clients a complete and ongoing support solution for their network equipment where perhaps existing manufacturer support is no longer available or is too costly. We pride ourselves in our staff knowledge and industry expertise that sets us apart from our competitors.

If you are happy with your network equipment, but support is no longer being offered to you by the manufacturer, Carritech can help.

Carritech are an ISO9001 and ISO14001 company.

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