TIA-920-A Sequence for Wideband Digital Phones May 5, 2015/在： For Purchase Telephone Sequences /通过： ZarinaThis sequence has been superseded by TIA 920-B test sequence. More https://www.listeninc.com/wp/media/logo.png 0 0 Zarina https://www.listeninc.com/wp/media/logo.png Zarina2015-05-05 12:50:112018-10-12 14:55:55TIA-920-A Sequence for Wideband Digital Phones
