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nWise is a global provider of specialized technology that enables people who are Deaf, DeafBlind and Hard of Hearing to make direct calls to access Emergency Services using Real-Time Text (RTT). We are experts on RTT, having delivered critical long-term installations worldwide in accordance with the RFC 4103 standard since 2005. Something that is essential for the approximately 395 million people around the world that have deafness or hearing loss and can’t access Emergency Services in an effective way. 

Read more: Total Conversation with RTT

nWise RTT Bridge 

Our technology nWise RTT Bridge is integrated into the existing NG112 infrastructure where RTT calls are handled effectively and according to established processes. This saves time, and in a critical situation saves lives. 

nWise RTT Bridge is a key element in Next Generation Core Services (NGCS) for effectively connecting RTT calls to a PSAP. It has been developed to meet the requirements of ETSI EMTEL and NENA i3 standards.

We deliver an effective integration of RTT into the Emergency Services infrastructure by connecting multiple parties using RTT in a single call flow. 

  • nWise RTT Bridge conforms with the European Electronic Communication Code (EECC- EU directive 2018/1972): Real-Time Text, Total Conversation and Relay Services. 
  • It is designed in accordance with the technical requirements in ETSI EMTEL standards, TS 103 479 and TS 103 201.  
  • It uses SIP according to RFC 3261 
  • It follows ITU-T T.140 payload according to RFC 4101 
  • It uses RTP-Mixer Formatting of Multiparty RTT according to RCF 9071 
  • It is a SIP-aware bridge with support for several methods of connection: WEB RTC data channel, MSRP, SIP message. It supports the use of WebRTC data channels as a transport for T.140, as described in RFC 8865.
  • It is compatible with TS 103 871 (PEMEA RTT).

Benefits of using nWise RTT Bridge 

  • It is easy to connect to a current infrastructure. API:s SIP/SDP methods for bridge control, statistics/log for bridge logging and status queries.
  • It has High Availability (HA) via shared sessions and multiple active nodes. Microservices architecture where exposed services are stateless e.g. RTP-endpoints and can be restarted without disruption of service. 
  • It is Secure. SRTP (SDES) according to RFC 3711, DTLS-SRTP according to RFC 5764.  
  • It has call recording in a dedicated component to allow central or distributed recording.  

Read more: Accessible Emergency Calls with RTT

The time is NOW for accessible emergency calls 

According to the new EU directive, EECC 2018/1972, work must be done to make Emergency Services accessible to the Deaf, DeafBlind and Hard of Hearing on the same terms as anyone else. This also puts emphasis on the importance of using standardized RTT. With nWise RTT Bridge you integrate incoming RTT calls with the infrastructure of the Emergency Service, minimizing changes to the operational environment. Contact us or visit our website to find out more about how nWise RTT Bridge can help you with accessibility to emergency services. 

 Every person counts. Every call counts. Every second counts.

Read more: Implementation of RTT in Europe

last updated: December 2022