The telecommunication sector provides signal exchange over greater distances. The companies can be divided into network operators (carrier), producers of telecommunication solutions (supplier) and service providers. The largest companies of this sector are Deutsche Telekom, NTT, AT&T, KDDI, China Mobile, Vodafone, Telefónica, Verizon, France Telekom and América Móvil. The biggest suppliers worldwide are Ericsson, Nokia Solutions and Networks, Cisco, Huawei, Alcatel-Lucent and ZTE.

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