In 1967 Siemens made a substantial contribution in support of the national industry by signing a licensing agreement in return for a 20% share of the newly founded Iranian Telecommunication Manufacturing Company (ITMC) in Shiraz. From 1969 to 1990, ITMC had a significant impact on the expansion of the Iranian telecommunications network. Approximately 1.25 million lines of the Siemens analog switching system EMD were commissioned during this period. The company's added net value rose continuously up to 80% at a mean production level of 50,000 lines per annum. Following the conversion from analog to digital switching technology, Siemens has delivered or contracted for 1.6 million digital electronic switching system (EWSD) ports to date.
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