TransTelecom, a telecom operator in Bulgaria, 
has selected Huawei Technologies to deploy a commercial WiMAX network covering central business districts and hot spots in the country’s major cities, including its capital, Sofia, and Varna, Bulgaria’s largest harbor city. Under the contract, Huawei will supply an end-to-end WiMAX solution working on 3.5GHz frequency band, including terminals, as well as a major upgrade of the TransTelecom central exchange equipment for the operation of a fully mobile WiMAX network in 2008.
In 2006, TransTelecom deployed a 16d-based WiMAX network to meet the country’s increasing broadband needs, and the operator has chosen Huawei to deliver an upgraded 16e-based network.http://www.huawei.comhttp://www.transtelecom.bg/
