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Transmitting subscriber identification
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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Caller_ID/hh9DqEEj">Caller ID</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"ITU T.30 specification". <a href="https://www.itu.int/rec/T-REC-T.30-200509-I/en" target="_blank">https://www.itu.int/rec/T-REC-T.30-200509-I/en</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>