Voice

Index your voice call transcriptions in an AI Search collection, and enable transcript persistence on your SIP connections.

The voice source indexes your account’s persisted voice call transcriptions. Calls become searchable minutes after they end — there is nothing to sync.

Where this data comes from

Voice records are produced by Telnyx Programmable Voice: any call handled by a SIP connection with conversation_persistence enabled is transcribed and stored, then indexed as a voice record. Enable persistence per connection in Enable Voice Transcript Persistence below.

Attach the Source

curl -X POST https://api.telnyx.com/v2/ai/collections/{uuid}/sources \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "source_type": "voice" }'

The source indexes every persisted voice transcription on the account. A collection over an account with no persisted transcriptions returns empty results — enable persistence first.

Enable Voice Transcript Persistence

Voice transcripts are persisted per SIP connection. Set conversation_persistence to true on each connection whose calls you want transcribed, stored, and indexed:

curl -X PATCH https://api.telnyx.com/v2/credential_connections/{id} \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "conversation_persistence": true }'

The same field exists on all supported connection types:

Connection type	Endpoint
Credential connections	PATCH /v2/credential_connections/{id}
IP connections	PATCH /v2/ip_connections/{id}
FQDN connections	PATCH /v2/fqdn_connections/{id}

Verify with a GET on the connection — the response includes conversation_persistence. Set it to false to stop persisting new calls.

From then on, every call handled by that connection is transcribed and indexed automatically. Persisted records include 30 days of indexed retention — see Pricing for extended retention.

What a Result Looks Like

Voice chunks carry record_type: "voice" plus the call’s identifiers and timestamps:

{
  "id": "e30570b6-68d5-11f1-838c-02420a0ddb20:0",
  "record_id": "e30570b6-68d5-11f1-838c-02420a0ddb20",
  "chunk_index": 0,
  "chunk_total": 1,
  "text": "...The refund of $200 has been deposited back in your account...",
  "score": 0.904,
  "record_type": "voice",
  "record_created_at": "2026-06-15T16:18:49.981698+00:00",
  "ingested_at": "2026-06-15T16:20:12.170251+00:00",
  "metadata": { "source": "Trunking" }
}

Narrow searches to calls with sources=voice or filter on record fields — see Search.

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See all source types on the Sources overview.