ISO/IEC TECHNICAL REPORT TR 16167 Second edition 2011-09-01 Information technology Telecommunications and information exchange between systems Next Generation Corporate Networks (NGCN) Emergency calls Technologies de l'information - Teléinformatique-Réseaux d'entreprise de prochaine génération (NGCN) Appels d'urgence Reference number ISO/IEC TR 16167:2011(E) IEC [so @ISO/IEC2011 by IHS under ted without license from IHS Not for Resale ISO/IEC TR 16167:2011(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO/IEC2011 IsO's memberbody in the country of the requester. ISo:copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO/IEC 2011 - All rights reserved etworking permitted without license from IHS Not for Resale ISO/IEC TR 16167:2011(E) Contents Page Foreword Introduction. 1 Scope 2 Normative references.. 3 Terms and definitions .. 3.1 External definitions .... 3.2 Other definitions.. 4 Abbreviations... 5 Background.. 6 Technical aspects of emergency calls in enterprise networks . 6.1 Identifying a call as an emergency call....... 6.1.1 Useractions... .8 6.1.2 Signalling impact.. 10 6.1.3 Unauthenticated acces 12 6.2 Obtaining and delivering the location of the caller..... 12 6.2.1 Format of location information ... 13 6.2.2 Obtaining location information for delivery.... 13 6.2.3 Location conveyance in SIP 6.3 Routing an emergency call to the appropriate SAP 18 6.3.1 Routing by the calling device.... 19 6.3.2 .20 6.4 Delivering information to the SAP to allow a return call or verification call to be made.. 6.4.1 Delivery of caller identification ... 21 6.4.2 Delivery of device identification ... 21 6.4.3 Identifying a return call or verification call............. ...22 6.5 Ensuring appropriate resources are available for an emergency call, return call or verification call ... .............. .22 6.6 23 6.7 6.8 Other aspects... 25 6.8.1 Hosted users.. 25 6.8.2 Guest users..... .25 7 NGN considerations 25 8 Device considerations . 27 9 Alternatives for roaming mobile and nomadic users .... ..28 9.1 Estabiisning an emergency caii wnen aiready signailing via a visited pubiic network ..... 9.2 Establishing an emergency call via a visited public network when other traffic is signalled directly via the enterprise network ... 9.3 Establishing an emergency call directly to a PSAP.... 10 Enterprise responsibilities 29 11 Summary of requirements and standardisation gaps.. 11.1 Requirements on NGNs .... ...30 11.2 Recommendations on enterprise networks .30 11.3 Standardisation gaps.... 31 Bibliography. 32 Copyright IntematinalOoganainrsandadiztion Allrights reserved ili ted withoutlicensefromIHS Not for Resale