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Voice quality

Answer Seizure Rate (ASR) vs Automatic Speech Recognition (ASR) — Answer Seizure Rate / Automatic Speech Recognition

What is Answer Seizure Rate (ASR) vs Automatic Speech Recognition (ASR)?

In telephony, Answer Seizure Rate (ASR) is the share of seized calls that reach an answer, reported with ACD and PDD as the voice-quality triad in ITU-T E-series traffic engineering. The same acronym also means Automatic Speech Recognition, the machine-learning technology that converts speech to text, and that is the ASR in speech-recognition spend lines and transcript tooling. This entry defines the telephony metric and keeps the two apart.

More detail

A seizure is an attempt: the moment the originating switch grips a trunk and sends the call toward the destination. Answer Seizure Rate divides the calls that were answered by those seizures, usually as a percentage, and carriers and wholesale operators read it per route exactly as they read PDD, jitter, packet loss, and MOS for the media path. ITU-T E-series traffic engineering treats ASR, ACD (Average Call Duration), and PDD as the route-health triad; a route whose ASR slips while its audio stays clean is still a route to re-route around.

Automatic Speech Recognition is the unrelated, same-acronym term from machine learning: the speech-to-text step at the front of a voice-agent pipeline, paired with text-to-speech at the other end. Because the collision lands in real product surfaces, this entry is the disambiguation page: the STT (Speech-to-Text) entry (see S in the docs glossary) defines the transcription technology, while the telephony metric pairs with the disconnect-reason ladder (busy, declined, no answer, unrouted) that moves the dial-side number.

In Orbit, the machine-learning meaning is the one inside the product: the speech-recognition spend line on the LLM-spend budget and the ASR entity correction on call transcripts both name Automatic Speech Recognition, and the four STT providers in an agent's voice settings failover chain (Deepgram Nova-3, OpenAI Whisper, Azure Speech, Google STT) are the same technology. Orbit's telephony voice-quality surfaces document the rest of the triad, PDD, MOS (Mean Opinion Score), jitter, and packet loss, and calls ride the wholesale softswitch described in the jambonz-softswitch concept. Orbit does not compute or display an Answer Seizure Rate KPI today; voice operators reading the term on a carrier report or a cost line should read it in the telephony sense.

Frequently asked

Is Answer Seizure Rate the same as speech recognition?
No. They only share the acronym ASR. Answer Seizure Rate is a telephony route metric, the share of attempted calls that reach an answer, while Automatic Speech Recognition is the machine-learning technology that turns spoken audio into text, the STT step in a voice-agent pipeline.
What does a low Answer Seizure Rate tell me?
That a route is losing calls before audio: busy recipients, declines, unreachable numbers, or routing refusals. Read it against the disconnect-reason ladder (SIP 480/486/603/404) to see whose side the losses are on, and against PDD and MOS to separate dial-side failure from media-side quality.

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