NG112 reference

Rtt

Structured NG112 reference page.

112 readiness

Policy, location, routing, and response quality connected in one operational model.

Media

Real-Time Text

RTT is not SMS. It is an interactive media mode that can run alongside voice and video, making emergency communication more accessible and faster for callers who cannot use voice reliably.

RTT is not SMS; it is real-time conversational text.

Caller text input

RTT media

Emergency session

PSAP call taker

What it does

Real-Time Text sends characters as they are typed, enabling conversational text during emergency communications.

RTT supports equivalent access and can become part of a multimedia emergency session delivered to the PSAP.

How it works

Characters are transmitted progressively rather than waiting for a completed message.
RTT can be negotiated as part of a multimedia session.
The PSAP needs call-handling tools that display and record the text stream.

Key interfaces and protocols

SIP/SDP media negotiation
RTT media formats
PSAP call-handling integration
Recording/audit

Systems it interacts with

Total Conversation
Accessibility
PSAP
Recording
SIP

Common failure modes

PSAP can receive voice but not RTT.
Recording captures audio but not text.
Fallback to messaging changes user experience.
Training treats RTT as a side channel.

Implementation considerations

Test simultaneous voice and text.
Train call takers on conversational text etiquette.
Ensure logging and retention policies cover RTT.

Standards

ETSI accessibility and NG112 references
IETF/SIP media negotiation references

Related NG112 technologies

Relationship graph

Accessibility chain: Real-Time Text <-> Total Conversation <-> Accessibility <-> PSAP Technology

Total Conversation Accessibility Emergency Text PSAP Technology Recording and Audit

Related country deployments

No country deployments are listed here until independently verified against official or high-confidence sources.

Accessibility

Sources

112: the European emergency number - European Commission, accessed 2026-08-31
Directive (EU) 2018/1972 establishing the European Electronic Communications Code - European Union, accessed 2026-08-31
Emergency communications - BEREC, accessed 2026-08-31
Next Generation 112 and the new Emergency Services Networks Landscape - EENA, accessed 2026-08-31
ETSI TS 103 479 deliverable directory - ETSI, accessed 2026-08-31

Last verified: 2026-08-31

Rtt