Internet protocol-based emergency services / Henning Schulzrinne. [electronic resource] Schulzrinne, Henning. Emergency communication systems. Computer network protocols. Internet. Public safety radio service. TK6570.P8 004.67/8 23 Includes bibliographical references and index. Print version record and CIP data provided by publisher. 2014 Text 1 online resource. http://onlinelibrary.wiley.com/book/10.1002/9781119993858 eng Internet protocol-based emergency services. Internet protocol-based emergency services.