Siemens · Boards, Cards & Modules
Siemens EWSD switching, hiX access and SURPASS hiT modules
Siemens was one of the founding vendors of European digital telecom infrastructure, with its EWSD digital switching system deployed across fixed networks worldwide and its hiX broadband access platform supplying DSL and VDSL access nodes. In 2007 Siemens' carrier-related communications business merged with Nokia's networks business to form Nokia Siemens Networks (NSN); Siemens fully divested its stake in 2013 and the joint venture was renamed Nokia Networks. A further slice of the fixed-line broadband access portfolio, including the hiX5600 line, was sold on again to Adtran in 2012 (see our Adtran page). The stock on this page is genuinely Siemens-branded - legacy EWSD and hiX part numbers, using the S3xxxx and S5xxxx prefixes from before and around that transition - and is a separate line of stock from the jointly-branded Nokia-and-Siemens B-series and HiT cards covered on our other catalogue pages.
How to read these part numbers
Part numbers beginning S30050 and S30861 belong to the EWSD digital switching system - DCC/DCCDN/DCCDM modules are DC power converters, the DC and battery controller unit (DCBCTRL) and equipment control unit (ECU) modules manage rack power and control functions, and FANV6 is a cooling fan unit. Part numbers beginning S50028 belong to the hiX broadband access platform - Interface Unit (IU) cards are named by DSL technology and port count, and CIU/CXU-prefixed modules are control and interface cards for the hiX shelf. The S42024-prefixed 8-channel VOA card belongs to the SURPASS hiT optical transport family, covered in more depth on our dedicated Nokia and Siemens HiT page.
Catalogue
Equipment reference
| Part Number | Model / Designation | Compatibility | Band / Interface | Condition | Lead Time | Quote |
|---|---|---|---|---|---|---|
| S30050-Q6111-X-7 | EWSD DCC power converter module (DCCDM) | Siemens EWSD digital switching system | On enquiry | On enquiry | On enquiry | |
| S30050-Q6112-X-D3 | EWSD DCC power converter module (DCCDN) | Siemens EWSD digital switching system | On enquiry | On enquiry | On enquiry | |
| S30861-U2400-X | EWSD equipment control unit module (ECUGV3A) | Siemens EWSD digital switching system | On enquiry | On enquiry | On enquiry | |
| S30861-U2463-X | EWSD fan unit (FANV6) | Siemens EWSD digital switching system | Cooling fan module | On enquiry | On enquiry | |
| S30861-U4103-X01/01 | EWSD DC and battery controller unit (DCBCTRL) | Siemens EWSD digital switching system power subsystem | On enquiry | On enquiry | On enquiry | |
| S30861-U4250-X | EWSD module (DTMARETFV2) | Siemens EWSD digital switching system | On enquiry | On enquiry | On enquiry | |
| S42024-L5432-A81 | SURPASS hiT 8-channel variable optical attenuator (VOA) card | Siemens SURPASS hiT optical transport platform | 8-channel variable optical attenuator | On enquiry | On enquiry | |
| S50028-Q2038-E3 | hiX Interface Unit, ADSL, 72-port (variant J, ME:CG) | Siemens hiX broadband access platform | 72-port ADSL interface unit line card | On enquiry | On enquiry | |
| S50028-Q2047-A1 | hiX Central Interface Unit 2 (CIU2, variant E) | Siemens hiX broadband access platform | On enquiry | On enquiry | On enquiry | |
| S50028-Q2069-A4 | hiX Interface Unit, VDSL, 48-port (A4, MELT variant) | Siemens hiX broadband access platform | 48-port VDSL interface unit line card | On enquiry | On enquiry | |
| S50028-Q3135-B1 | hiX control/interface unit module (CXUG1B) | Siemens hiX broadband access platform | On enquiry | On enquiry | On enquiry |
Cannot find a part number? Send us the number and we will identify and price it.
Ordering notes
Give the exact part number, including the dash suffix - EWSD and hiX modules that share a base part number but carry a different suffix are not always interchangeable. All items on this page are legacy, discontinued stock and are supplied refurbished or used only, condition confirmed per enquiry; where a destination does not admit used network equipment we will flag this before quoting. Hardware only: software licensing remains between the buyer and the current platform owner (Nokia, for most EWSD and hiX assets). Destination type approval and import permits (CST/SABER, TDRA, ICASA, CA, CMC, ARPCE) are the buyer's responsibility and we will say so on the quotation.
Lifecycle and availability
Siemens ceased operating as a standalone carrier telecom brand after the 2007 Nokia Siemens Networks merger, and fully exited the joint venture in 2013. EWSD and hiX hardware carrying genuine Siemens part numbers is long out of production and out of vendor support under the Siemens name; all stock on this page is refurbished or used, sourced and sold on that basis.
Equipment condition
New — factory-sealed, supplied through the manufacturer's own channel or a qualified distributor, with full manufacturer warranty.
New surplus — unused factory stock, original packaging where available, sourced from decommissioned projects or distributor inventory. Manufacturer warranty may have lapsed; CRS PLUS warranty applies.
Refurbished / tested — previously deployed equipment, cleaned, firmware-checked and functionally tested against the manufacturer's specification before shipment. CRS PLUS warranty applies.
Condition is confirmed in writing on every quotation before you commit to an order.
Warranty
Warranty terms vary by item, by condition and by the supplier the equipment is sourced from. They are stated in writing on the quotation, per line item, before you commit to an order.
Where equipment is supplied new through the manufacturer's own channel, the manufacturer's warranty applies and is passed to you.
Send us the part numbers you need and we will confirm warranty terms alongside availability, condition, lead time and price.
Questions
Frequently asked questions
Is this the same Siemens equipment as the site's other Nokia-and-Siemens pages?
No - this page covers separately identified Siemens-branded EWSD, hiX and SURPASS hiT stock in our own inventory. Our Nokia and Siemens B-series and HiT pages cover a different, jointly-branded set of boards; see those pages if you're specifically after B-series control boards or the wider HiT optical transport range.
What happened to Siemens' telecom business?
In 2007 Siemens merged its carrier-related communications business with Nokia's networks business to form Nokia Siemens Networks. Siemens sold its remaining stake to Nokia in 2013, and the joint venture was renamed Nokia Networks. A separate slice of the fixed-line broadband access portfolio, including the hiX5600 line, was sold on to Adtran in 2012.
Is any of this hardware still in production?
No. EWSD, hiX and the SURPASS hiT-era optical cards on this page are all discontinued; everything we supply here is refurbished or used, matched to the exact part number requested.
Related pages
Manufacturer names, product names and part numbers are the property of their respective owners and are used here for identification purposes only. CRS PLUS sources these products through its qualified supplier base and holds no distributor, reseller or agency appointment from any manufacturer listed.
This catalogue is compiled from our supplier network's available inventory and from manufacturer product documentation, and is reviewed monthly. Listing does not indicate stock held by CRS PLUS — availability, condition and lead time are confirmed per enquiry. Last reviewed: 22 August 2026.
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