CSL is a subsidiary of Australia’s Telstra Corporation and is the biggest mobile operator in Hong Kong. In March 2008, CSL contracted ZTE to evolve its existing mobile network into a new all-IP mobile network. To reduce the high Operating Expense (OPEX) of network operation and maintenance, CSL sought an Integrated Network Management System (INMS) to consolidate alarms from various network segments, and to improve network operation and maintenance efficiency. ZTE provided CSL with an integrated network solution based on Software Defined Radio (SDR) soft base stations. The SDR solution supports upgrade to High Speed Downlink Packet Access (HSDPA+) and enables a smooth transition to a Long Term Evolution (LTE) network.