ETSI TR 103 000-3-3 English Printed Edition English PDF Access and Terminals (AT); Analogue Access to Public Telephone Networks; Advisory Notes to Standards Harmonizing Terminal Interface; Part 3: Country Specific Advisory Notes; Sub-Part 3: ATAAB Advisory Note AN020 for the Czech Republic Network; Loop current characteristics (seizing the line)

standard published 08/01/2001 by European Telecommunications Standards Institute