VoIPCortex IP PBX solutions - open, scalable, accessible, feature-laden telephony for SMEs and enterprise Home Why VoIP? IP PBX functionality VoIP Checklist What is VoIP? Contact open - scalable - accessible - feature-laden Voice over IP telephony from ipcortex, in partnership with Mercury Systems Engineers Mercury Systems Engineers Ltd, Unit G2, Liners Industrial Estate, Freemantle, Southampton, SO15 3FQ. Tel: 023 8033 6620 ©Copyright IP Cortex Ltd 2009.