ETSI TR 103 000-3-2

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 2: ATAAB Advisory Note AN019 for the Czech Republic Network; DTMF signalling: tone and pause duration Edition: 1.1.1
European Telecommunications Standards Institute / 01-Aug-2001 / 7 pages