SDoC

NBTC Certification for Telecommunication Terminal Equipment (TTE)

Telecommunication Terminal Equipment (TTE) is any device designed and intended to connect to a public telecommunications network at the user access point — and that users can install themselves. Even though TTE transmits over electrical signals rather than radio waves, NBTC certification is required before the equipment can be imported or sold in Thailand.

What Counts as TTE?

This page covers equipment in two NBTC categories — Telecommunication Terminal Equipment (TTE) and Information Technology Equipment (ITE). Both require compliance with NBTC TS 3001-2561 (EMC) and NBTC TS 4001-2561 (Electrical Safety). Common examples include:

Voice Equipment: Telephone sets, key telephone systems, facsimile equipment
Switching Systems: PABX (Private Automatic Branch Exchange) systems
Broadband Access: xDSL equipment (ADSL, VDSL, SDSL modems and CPE)
Data Networking: Ethernet devices, PoE (Power-over-Ethernet) switches, data terminal equipment (DTE)
Dial-up / Leased Line: Analogue modems, ISDN terminal adapters

Where TTE Fits in the NBTC Equipment Framework

NBTC certifies telecommunications equipment across three categories, each distinguished by the physical medium and signal type used to transmit information:

NBTC equipment classification by signal medium
Category	Signal Medium	Applicable Standard(s)
RF Device	Radio Wave	NBTC TS or NBTC Frequency Announcement
Optical System	Light Wave	NTC TS 2001-2550
TTE / ITE	Electrical Signal	NBTC TS 3001-2561 / NBTC TS 4001-2561

TTE does not use a radio spectrum allocation and therefore requires no frequency authorisation. However, it still requires NBTC type approval under the SDoC scheme because it connects to or forms part of the public telecommunications network and must meet defined interface and safety standards.

Certification Requirements

All equipment covered by this page requires SDoC certification under both NBTC TS 3001-2561 (EMC) and NBTC TS 4001-2561 (Electrical Safety).

Certification requirements for TTE and ITE products
Standard	Coverage	Certification
NBTC TS 3001-2561	Electromagnetic Compatibility (EMC)	SDoC
NBTC TS 4001-2561	Electrical Safety	SDoC

Required Documents

TTE certifies via the SDoC (Supplier's Declaration of Conformity) scheme. The applicant is responsible for ensuring all supporting documentation is complete and accurate before submission.

Technical specification or datasheet including interface and electrical characteristics
Product photos
Test report from an accredited laboratory
Authorised declaration

No physical product sample submission is required.

Indicative Timeline

SDoCApproximately 1 week from submission

Additional time may be required if NBTC requests supplementary documents during review.

Also uses SDoC — light wave signal medium

Optical System — NBTC Certification

RF device example

Wi-Fi Router & Access Point — NBTC Certification

Ready to certify your TTE product for Thailand?

Zergo handles the full NBTC certification process — application preparation, submission, and all NBTC communication — for wired telecom equipment and IT equipment connecting to public networks.

See our NBTC Certification Service →