/EINPresswire.com/ The Micro Sensor Photonics (China) engineering team can put together a package for: Communications – with 4, 8 or even 16 of the trapped miners at a time. This would use the existing MSP system with a hybrid cable – metal and fibre optic elements together, with DC power at low voltage. All the components would be small – the cable taking little space in the narrow access boreholes, small micro phone, thinner than a pencil and small earphones, plugged in, in series to the cable underground. No conventional switchboard would be needed underground. ther multimedia could also be supplied and some lighting.