Siemens PABX Hipath 3550 Switchboard:
The HiPath 3550 PABX range of switchboards is ideal for business users up to 100 extensions using traditional switchboard services such as ISDN while also offering Voice Over IP. (VOIP) Advanced telephones in the OptiPoint range offer the telephone user digital telephone displays.
http://www.siemenssa.co.za/Brochure_HiPath3000.pdf
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