Exchange & Cabinet Tour 19 th November 2009

2 Traditional fixed telephony is based around a central office or exchange that serves customers with an urban planning limit of 3.6km. Note that this was often exceeded, using multiple cable gauges, especially in Auckland, The outside plant, typically consists of three main components; the feeder, the distribution and the drop. The main distribution frame (MDF), copper cross connect cabinet and the distribution pillar serve as the termination points between the three main components. 130,000 km of distribution cable Nationwide Typically direct buried 9,000 km of feeder cable nationwide Typically in ducts Traditional Copper Network

3 A copper network is capable of very high speeds (towards 100Mbps). However this is only attained by using very high frequencies which drop away with length. The higher bandwidth means the higher the frequencies that need to be used. This is why a network that is designed for the low frequencies of voice ( Hz) does not carry the high frequencies (up to 30MHz for VDSL2) for broadband the same distances. Improving the performance of the network therefore comes not from fundamentally changing it, just from shortening the length of copper between the customer and the equipment generating the high frequencies. Essentially shortening the loop is replacing the copper cross connect cabinet with a new active cabinet that houses a DSLAM and is connected by fibre back to the network. Telecom has been doing this for new build and lifecycle replacement since Cabinetisation means moving fibre closer to the customer

4 The basic building blocks OLD NEW

5 Size of cabinets - Single bay cabinet 1660w x 1500h x 600d - Double bay cabinet 2250w x 1500h x 600d - Mostly single bay cabinets will be deployed (some double bays required) Single and Double Bay Whisper Cabinets On the outside On the inside

6 Typical cabinets that will be replaced USC(PCM) & PedestalNokia 480 PCM BPO Cross-connect Nokia 240 PCM Krone Cross-connect Nokia 60 PCM