ITU‑T does not issue certificates – it publishes technical recommendations. Testing is performed by ISO 17025 labs, which issue conformance test reports – not a certificate with an expiry date.

With that understood, here’s how “validity” and version updates actually work.

1. Does an ITU‑T Report Have an Expiry?

No. An ITU‑T report is a technical verification of a specific firmware version at a specific point in time – there is no fixed expiration date.
So why do people talk about a “3‑year ITU‑T certification validity”?

The reason is not a single platform – CarPlay and Android Auto both reference ITU‑T for voice quality, and their certification release cycles can drive standard updates. But national telecom network‑access reviews, CCC automotive audio reviews, and lab accreditation renewal all also influence which standard version is accepted. A lab without the latest ISO 17025 accreditation for a new standard cannot issue reports that brand owners will accept.

  2. P‑Series Version Updates and Migration

·P.1100 (Narrow‑band hands‑free) – 200–3400 Hz. Current effective version: 2025 (not the rumoured 2024 revision). Key updates: echo cancellation and double‑talk test models.

·P.1110 (Wide‑band hands‑free) – 50–7000 Hz. Most widely used for automotive. Current version: 2025 – noise suppression testing has more complex scenarios and background noise types. Mandatory for CarPlay and Android Auto.

·P.1120 (Super‑wide‑band) – 20–20000 Hz. Not mandatory for CarPlay – only for devices supporting full‑band 48 kHz voice sampling. However: some high‑end overseas OEMs require P.1120 base‑link testing even if the hardware doesn’t support 20 kHz – don’t decide based solely on bandwidth.

  3. Practical Risks of Standard Version Switching

·Legacy devices – already‑type‑approved and in production: old reports can be archived – no retest required.

·New variants/extensions on the same hardware platform – brand programmes will require the latest ITU‑T version – not fully retrospective, but you must check the product lifecycle stage.

·Apple’s real requirement: new product applications must use the current mainstream version; existing certified vehicles retain their old reports.

·Lab accreditation sync – when ITU‑T standards update, labs must first obtain ISO 17025 scope extension for the new standard before brand owners will accept new reports. A single P‑series extension takes ~1 month; a full suite (P.1100, P.1110, P.1120 plus HATS head‑and‑torso simulator calibration) takes 2–3 months – do not plan for 1 month.

  4. Common Pitfalls

·ETSI EG 202 396 is for VoIP terminals – CarPlay/Android Auto do not accept it. No cross‑reuse.

·P.1100 and P.1110 can be combined into one test report with separate sections – CarPlay accepts this. Confirm with your lab beforehand – it saves fees.

  5. When Changes Trigger Retesting

·Hardware – microphone array, speaker unit, DSP major changes – old report invalid → full retest.

·Firmware – modifications to echo suppression, noise reduction, or voice codec algorithms – even if hardware unchanged – brand programmes require retesting of corresponding ITU‑T voice test cases. It’s not only hardware changes that trigger re‑testing.

For ITU‑T voice quality certification, contact BlueAsia at 13534225140 (King) or king.guo@cblueasia.com.