@misc{5306, author = {David Kuhn}, title = {Security for Private Branch Exchange Systems}, year = {2000}, month = {2000-08-01}, publisher = {ITL Bulletin, National Institute of Standards and Technology, Gaithersburg, MD}, url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=151230}, language = {en}, }