| Dual Band |
Since 1993, Mobile digital networks in Australia have been built using a frequency (or band) of 900MHz. In 2000, the three digital carriers (Optus, Telstra, Vodafone) started to introduce a new technology, which uses a frequency of 1800MHz. Most 1800MHz base stations are not stand-alone - they are built on an existing 900MHz base stations. This is called a "Dual Band" base station - because it can transmit on two different frequencies. By rolling out GSM1800 sites, we are able to provide additional capacity to customers who have a dual band phone. The rollout of 1800 sites and cost is much less than building a brand new site. The equipment required to operate GSM1800 is located in the same shelters as the GSM900 equipment.
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