<SEC-DOCUMENT>0001564590-19-023817-index.html : 20190627 <SEC-HEADER>0001564590-19-023817.hdr.sgml : 20190627 <ACCEPTANCE-DATETIME>20190627154935 ACCESSION NUMBER: 0001564590-19-023817 CONFORMED SUBMISSION TYPE: 11-K PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20181231 FILED AS OF DATE: 20190627 DATE AS OF CHANGE: 20190627 FILER: COMPANY DATA: COMPANY CONFORMED NAME: ADTRAN INC CENTRAL INDEX KEY: 0000926282 STANDARD INDUSTRIAL CLASSIFICATION: TELEPHONE & TELEGRAPH APPARATUS [3661] IRS NUMBER: 630918200 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 11-K SEC ACT: 1934 Act SEC FILE NUMBER: 000-24612 FILM NUMBER: 19925275 BUSINESS ADDRESS: STREET 1: 901 EXPLORER BLVD CITY: HUNTSVILLE STATE: AL ZIP: 35806 BUSINESS PHONE: 2569638220 MAIL ADDRESS: STREET 1: 901 EXPLORER BLVD CITY: HUNTSVILLE STATE: AL ZIP: 35806 </SEC-HEADER> <DOCUMENT> <TYPE>11-K <SEQUENCE>1 <FILENAME>adtn-11k_20181231.htm <DESCRIPTION>11-K <TEXT> Document 1 - file: adtn-11k_20181231.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-23.1 <SEQUENCE>2 <FILENAME>adtn-ex231_7.htm <DESCRIPTION>EX-23.1 <TEXT> Document 2 - file: adtn-ex231_7.htm
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