Add 13.3.2: Multiparty call support during emergency service calls (from clause 13.9.2 of TR 103 708)
Proposal to add:
13.3.2 Multiparty call support during emergency service calls
Multiparty calling shall be supported during emergency calls when the initiative to add parties to the call comes from the emergency service, including calls using audio, RTT, or video, either individually or in any combination.
NOTE 1: Communication with emergency services commonly implies interacting in multiparty calls with the active media in the call (audio, video and RTT) and is therefore successfully served only by ICT supporting multiparty calling in the media used.
NOTE 2: Emergency access standards require some supplementary services, such as hold, conference and transfer, to be disabled from activation from the user device during emergency calls and callback.
NOTE 3: Emergency services prefer to get audio from the user terminal even when RTT is the main medium. Disabling muting of the microphone and audio transmission in user terminals during emergency calls and callback meets this need.
The results of these proposed changes can be previewed in Annex A of TR 103 708 ( tr_103708v010101p.pdf tr_103708v010101p.docx).