# The Dual-Use and Related Goods (Export Control) Regulations 1995, Paragraph 168: DEFINITIONS OF TERMS IN THIS ANNEX


“Synchronous digital hierarchy” (SDH) (5) means a digital hierarchy providing a means to manage, multiplex and access various forms of digital traffic using a synchronous transmission format on different types of media. The format is based on the Synchronous Transport Module (STM) which is defined by CCITT Recommendation G.703, G.707, G.708, G.709 and others yet to be published. The first level rate of “SDH” is 155.52 Mbit/s.

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Source: https://www.legislation.gov.uk/uksi/1995/271/schedule/1/paragraph/168 (the official version)
Page: https://openlegislation.uk/dual-use-and-related-goods-export-control-regulations-1995/schedule-1/paragraph-168
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.