installed for the purpose. The LAN cabling should be of category CAT5e or better to allow Small Cell Products Table 6.1 Nokia Flexi Zone Outdoor Micro/Pico base station features Weight Volume 5 litres Antenna Integrated omni and directional antenna, connectors for external antennas Temperature range -40°C to +55°C Output power Max 2 X 5 W Min 2 X 0.250 W MIMO support 2 x 2 MIMO Power consumption <100 W typical Max capacity 840 connected users Feature parity with macro cell Synchronization GPS, IEEE 1588v2 or Synchronous Ethernet Backhaul Microwave radio, Ethernet over fibre or copper, GPON for transmission of high LTE data rates. It may be possible to also route the base station traffic through the company LAN switches and routers. Careful testing is, however, necessary as old LAN equipment impair the signal quality, for example, by causing excessive delay variation to synchronization packets. If the existing LAN infrastructure can be reused, building an indoor system with pico base stations can be more cost efficient when compared to DAS. In addition, a much higher capacity is provided. Subscribers of multiple operators can be served by network-sharing arrangement between operators. Power over Ethernet (PoE) is a cost-efficient and practical way of providing power to the pico base station, as dedicated power supply at the location of the base station is avoided. Since the power supply of office information technology (IT) infrastructure equipment is typically uninterruptible power supply (UPS)-protected, using PoE also protects the office pico base stations from interruptions of the mains supply. There are different grades of PoE depending on the required power to be supplied to the powered device: PoE, PoE+ and PoE +. The first two have been standardized by IEEE, while PoE- + standard had not yet been published by the time of writing this text. The characteristics of different versions of PoE are presented in Table 6.2. Table 6.2 Characteristics of Power over Ethernet versions Maximum power Maximum available to