TBR21 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "TBR21" in English language version.

refsWebsite

Global rank English rank

355^th place

454^th place

7,368^th place

6,009^th place

etsi.org

"ETSI ES 203 021-1 V2.1.1 (2005-08) : ETSI Standard Access and Terminals (AT); Harmonized basic attachment requirements for Terminals for connection to analogue interfaces of the Telephone Networks; Update of the technical contents of TBR 021, EN 301 437, TBR 015, TBR 017; Part 1: General aspects" (PDF). Etsi.org. Retrieved 31 May 2019.

nist.gov

ts.nist.gov

"Nemko USA, Inc". Ts.nist.gov. Retrieved 31 May 2019.