✓CCC Certification ✓SRRC Type Approval ✓Network Access License ✓Certificates verifiable online 💬 Community Forum
Hotline: 0755-86370560 / 18927411650 service@ctlc.com.cn
Shenzhen CTLC Testing Technology Co., Ltd.CTLC
📞0755-86370560 Free Assessment→
Home / Success Cases
Case Library

Success Cases

Four elements per case: product and certification mix, key blocker, what we did, and the result. The 20 cases span 8 product lines and 4 certification combinations; client details are anonymized and technical detail is kept at a reusable level.

Free assessment for my product → 📞 0755-86370560
20published cases
8 product linesProduct lines covered
4 typesCertification combinations
25 clientsClients served (leading brands)
Featured CasesSmart home · CCC certification

Smart locks: 4 models consolidated into 2 approval units

Smart home brand · Bluetooth + Wi-Fi smart locks in two construction types (push-pull and lever). Four models spanned both constructions and two wireless configurations; the client planned to submit each separately, and whether models with different antenna gains could be combined was disputed.

4 → 2Models / Approval units
−40%Testing cost (vs. original plan)
1 batchUnified submission batch
Featured CasesSatellite & navigation · Multi-certificate

BeiDou short-message module: multi-certificate parallel filing

A leading BeiDou navigation company · BeiDou-3 short-message module. Receive sensitivity was insufficient and multi-band anti-interference failed the latest national standards; the various qualifications fell under different authorities, so separate filings meant duplicate sampling and uncoordinated schedules.

4 categoriesQualifications filed in parallel
1 batchOne sample batch covers multiple certificates
6 weeksSaved vs. a sequential approach
Product line
Certification type

All cases

Showing 18 / 18 cases
CCC
WearablesCCC certification

Smart watch: CCC + SRRC dual certification in parallel

Wearable brand · Smart watch (Bluetooth + Wi-Fi, 2 models, 1 unit)
Certification requirementCCC (IT equipment) + SRRC type approval
Actual timelineSRRC 10 weeks · CCC 12 weeks (including rectification and re-testing)
Key blockerThe chassis was very thin, the battery squeezed the antenna clearance, and both radiated spurious emissions and harmonics exceeded limits; meanwhile the CCC safety item failed on the charging structure — both tracks were blocked at once.
What we didRe-tested in the anechoic chamber to locate the spurious source, adjusted antenna clearance and feed routing, and added a matching network; rectified the charging structure and isolation design in parallel, then cross-validated both fixes before a single submission.
ResultSRRC and CCC passed in the same period; the 2 models were covered as one certification unit, and later strap and color variants extended directly.
CCC + SRRCAntenna rectificationUnit consolidation
SRRC
Sensing & MonitoringSRRC approval

Industrial wireless sensor approval

An IoT company · Wi-Fi + Bluetooth combo sensor
Certification requirementSRRC radio transmission equipment type approval
Actual timeline9 weeks (including 2 weeks of rectification and re-testing)
Key blockerSpurious radiation exceeded limits; the R&D team knew hardware development but had no RF rectification experience, and repeated antenna and circuit tuning brought no improvement.
What we didA full-band RF pre-scan located the spurious source; the antenna matching circuit was rebuilt, filter components and shielding were added to the RF module, and we re-tested in cycles in our own lab.
ResultAll metrics fell within limits, the approval test passed first time, the type approval certificate was obtained, and the product reached the industrial IoT market on schedule.
SRRCSpurious rectificationRF tuning
SRRC
Special communicationSRRC approval

Drone and counter-drone equipment approved in parallel

A security equipment maker · Inspection drone / fixed counter-drone system
Certification requirementSRRC type approval for both devices
Actual timeline8 weeks
Key blockerThe drone's 5.8G video-link module exceeded spurious limits, and the counter-drone unit's operating band interfered with the GPS protection band — different problems on the two devices, with a tender deadline approaching.
What we didPre-screened the two devices separately: rebuilt antenna matching and added multi-stage filtering on the drone to cut spurious; re-tuned the directional beam angle and added isolation shielding on the counter-drone unit to block interference into the protected band.
ResultBoth devices passed RF review in the same period, obtained approval certificates with CMIIT IDs, and made the tender deadline for a campus security project.
SRRCMulti-bandInterference suppression
Network access
Satellite & navigationNetwork Access License

BeiDou short-message handheld: network access

An emergency communications company · BeiDou-3 short-message terminal
Certification requirementTelecom equipment Network Access License (with the BeiDou-only special item and SRRC in parallel)
Actual timeline6 weeks
Key blockerShort-message send/receive latency missed the target, RF power and sensitivity failed the BeiDou equipment spec, the company lacked BeiDou-specific tuning experience, and the government procurement deadline was imminent.
What we didRan pre-tests across every dimension — short-message latency, RF transmit/receive, anti-interference and positioning accuracy — optimized baseband processing and the RF circuit, matched a BeiDou-specific antenna, and had engineers on site at the specialized lab.
ResultNetwork access testing passed first time, supporting qualifications were obtained in parallel, and the terminals went into volume supply to emergency management agencies.
Network Access LicenseBeiDou special itemOn-site test follow-up
Network access
Basic communicationNetwork Access License

4G/5G smart communication terminal: network access

A Shenzhen communication equipment company · Multi-function smart terminal
Certification requirementTelecom Equipment Network Access License
Actual timeline8 weeks (including rework and re-testing)
Key blockerTransmit power drifted, multi-band spurious exceeded limits, and network access protocol adaptation was unstable; repeated in-house tuning still fell short.
What we didOptimized the RF circuit structure, calibrated band power and upgraded the protocol adaptation firmware, alongside antenna tuning and shielding/filtering; once compliant, we compiled a single filing dossier and followed the tests on site.
ResultPassed network access testing first time; the terminal entered carrier and government-enterprise procurement channels.
Network Access LicenseProtocol adaptationPower calibration
Combination
Special communicationMulti-certificate combos

5G automotive terminal: three certificates in one

An automotive communications company · 5G T-BOX terminal
Certification requirementCCC + SRRC + Network Access License
Actual timeline16 weeks (including 2 rounds of rectification and re-testing)
Key blockerProtocol adaptation and RF receive sensitivity fell short of test standards; the original plan was to use three separate agencies, duplicating documents with no control over schedules.
What we didCoordinated all three qualifications as one: full pre-testing of protocol, RF and EMC up front, then a unified document pack and a single sample batch after rectification, with on-site follow-up for every test.
ResultAll three certificates were reviewed and issued together, removing multi-party coordination, and the terminal entered OEM pre-installation supply on schedule.
Multi-certificate combosAutomotive gradeMTNET
Combination
Industrial communicationMulti-certificate combos

5G industrial gateway: three certificates delivered

An industrial communications company · 5G industrial gateway
Certification requirementCCC + SRRC + Network Access License + factory audit coaching
Actual timeline14 weeks (three certificates in parallel)
Key blocker5G band spurious radiation exceeded limits and protocol compatibility was insufficient; the three business lines ran separately, shipping samples repeatedly with unsynchronized progress.
What we didStepped in with pre-testing before design freeze, optimizing the mainboard RF circuit and the 5G-specific antenna structure; filed the three certificates in parallel with a unified document set and factory quality-system coaching.
ResultAll three certificates were obtained together, the device connected compliantly to carrier networks, and it landed campus digitalization and government-enterprise upgrade projects.
Multi-certificate combos5GFactory audit coaching
SRRC
Smart entertainmentSRRC approval

AR glasses: Wi-Fi 6 + Bluetooth dual-mode approval

An XR brand · All-in-one AR glasses with antennas built into the temples
Certification requirementSRRC type approval (2.4G / 5G dual-band + Bluetooth)
Actual timeline8 weeks
Key blockerThe temple had only 6 mm of space, antenna efficiency was under 30%, and EIRP and spurious sat near the limits; the metal frame and heat spreader squeezed the clearance further.
What we didRedesigned the temple antenna (from IFA to slot antenna), adjusted the grounding of metal parts and added low-loss matching to the RF front end; three chamber iterations brought the margin above 3 dB.
ResultDual-band and Bluetooth passed approval first time, antenna efficiency rose to 42%, and two later derivative models with the same construction extended as coverage models.
SRRCAntenna designWearables
CCC
Smart HomeCCC certification

Smart display speaker: CCC + SRRC dual certificates

Smart home brand · 8-inch smart display speaker with adapter
Certification requirementCCC (A/V vs. IT equipment determination) + SRRC
Actual timelineSRRC 9 weeks · CCC 10 weeks
Key blockerWhether a display-equipped form factor fell under the catalog was disputed, and the adapter and main unit belonged to different certification entities, so the documents could not be closed out.
What we didIssued a catalog-placement opinion first to lock the filing path, then organized documents around the main unit + adapter structure; on the RF side, ran Wi-Fi and Bluetooth multi-mode coexistence tests in parallel.
ResultThe placement conclusion passed review first time and both certificates were obtained together; switching the adapter to an already-certified model removed duplicate testing.
CCC + SRRCCatalog placementMulti-mode coexistence
Combination
Smart entertainmentMulti-certificate combos

Portable projector: CCC and Wi-Fi approval in parallel

An AV brand · 1080P portable projector with built-in battery and Wi-Fi casting
Certification requirementCCC (A/V equipment) + SRRC
Actual timeline12 weeks (parallel)
Key blockerA built-in battery plus an adapter meant many safety test items; the Wi-Fi casting module was purchased, and its module certificate didn't match the device antenna.
What we didFiled along the A/V equipment path with separate documents for battery and adapter; rebuilt antenna matching on the device and added radiated tests, submitting both tracks in parallel.
ResultCCC and SRRC were certified together, and the listing documents were ready before the e-commerce mega-sale.
Multi-certificate combosAudio & video equipmentBattery safety
SRRC
WearablesSRRC approval

Smart band: SRRC passed first time

A sports brand · Bluetooth band (no cellular), 3 colorways in 1 unit
Certification requirementSRRC Type Approval
Actual timeline8 weeks
Key blockerThe band used a woven metal strap, so the antenna detuned when worn: free-space tests passed, but radiated efficiency collapsed on the wrist.
What we didIntroduced a test fixture simulating human tissue fluid for worn-state re-testing, adjusted the isolation distance between antenna and metal strap, and added a matching network to compensate the detuning.
ResultWorn-state and free-space metrics both met spec and approval passed first time; the 3 colorways were covered as one unit.
SRRCWorn-state testingUnit consolidation
SRRC
Smart HomeSRRC approval

Robot vacuum: Wi-Fi module rectification

A cleaning appliance company · Laser-navigation robot vacuum
Certification requirementSRRC type approval (Wi-Fi 2.4G)
Actual timeline8 weeks (including module rectification)
Key blockerThe motor drive and Wi-Fi module shared a ground, spurious rose 12 dB during operation, and intermittent overruns caused two failed re-tests.
What we didTraced to motor PWM noise coupling through the ground plane; reworked the ground and shielding partitions, added common-mode chokes and ferrite beads, and shifted the PWM frequency in firmware away from sensitive points.
ResultOperating-state spurious dropped 15 dB, the third submission passed, and mass-production sampling showed no further overruns.
SRRCEMC rectificationCommon-ground noise
Combination
Industrial communicationMulti-certificate combos

Industrial router: three certificates + carrier onboarding

An industrial communications company · 5G + Wi-Fi industrial router
Certification requirementCCC + SRRC + Network Access License + carrier onboarding
Actual timeline16 weeks (three certificates + onboarding)
Key blockerBeyond the three certificates, carrier onboarding testing was also required; the client assumed the Network Access License alone would suffice, which delayed the schedule by a month.
What we didFolded onboarding testing into the same schedule: three certificates filed in parallel, onboarding and network access tests sharing samples, and test items and configurations confirmed with the carrier in advance.
ResultAll three certificates and onboarding testing passed; the product entered the carrier's government-enterprise procurement catalog.
Multi-certificate combosCarrier onboarding5G
Network access
Sensing & MonitoringNetwork Access License

Environmental monitoring NB-IoT terminal: network access

An environmental monitoring company · Battery-powered NB-IoT water quality terminal
Certification requirementNetwork Access License + SRRC
Actual timeline6 weeks
Key blockerLow-duty-cycle transmission made it hard for the lab to capture stable samples; battery internal resistance caused a power shortfall at low voltage, with occasional field disconnections.
What we didProvided a dedicated test mode to meet continuous-transmission requirements; re-tested power at the minimum operating voltage, adjusted the power path and storage capacitors to improve transient supply capability.
ResultNetwork access and approval passed in the same period, field disconnection rates fell to an acceptable level, and terminals were deployed in volume at river-channel monitoring points.
Network Access LicenseNB-IoTLow power
Network access
Satellite & navigationNetwork Access License

Shipborne satellite terminal: SRRC + network access

A marine electronics company · Shipborne satellite terminal (with BeiDou positioning)
Certification requirementSRRC + Network Access License + station licensing coordination
Actual timeline9 weeks
Key blockerThe antenna was mechanically tracking, with large VSWR swings during rotation; the shipborne scenario also involved station licensing, and product certification and station setup ran on disconnected tracks.
What we didRan VSWR and radiation tests by tracking-angle zone and optimized the servo control strategy; compiled station licensing materials in parallel with product certification.
ResultProduct certification and station formalities were completed together, and the terminal was installed on board and delivered on schedule.
SRRC + Network AccessShipborneStation licensing
CCC
Special communicationCCC certification

Emergency communication radio: CCC + SRRC

An emergency communications company · Digital two-way handheld (including an explosion-proof version)
Certification requirementCCC + SRRC; the explosion-proof version additionally per explosion-proof requirements
Actual timelineSRRC 8 weeks · CCC 11 weeks
Key blockerOccupied bandwidth and spurious margins in the radio band were tight; the thicker explosion-proof housing reduced antenna efficiency, and the two versions constrained each other.
What we didSeparate antenna designs for the standard and explosion-proof versions; the explosion-proof unit moved to an external short antenna with rematched circuit. Both share the RF front end and test mode, cutting duplicate work.
ResultBoth versions obtained approval and CCC certificates, the explosion-proof version also obtained explosion-proof conformity certification, and both entered the emergency procurement list.
CCC + SRRCTwo-way radioExplosion-proof
CCC
Smart entertainmentCCC certification

AI toy: Bluetooth + Wi-Fi compliance

A toy brand · Voice-interactive AI toy (children's use case)
Certification requirementCCC + SRRC, plus additional safety requirements for children's products
Actual timelineSRRC 8 weeks · CCC 9 weeks
Key blockerThe product was positioned as a toy but included Wi-Fi connectivity and voice interaction, leaving both catalog placement and additional safety requirements unclear; the battery compartment was questioned as child-openable.
What we didDetermined placement and applicable standards first, then prepared safety items on both the toy and electronics dimensions; added screw fixing and a child-resistant design to the structure, and ran Wi-Fi/Bluetooth coexistence tests on the RF side.
ResultPlacement and safety items passed first time, both certificates were obtained, and the product entered maternal-and-baby channels as planned.
CCC + SRRCChild safetyPlacement determination
SRRC
Smart HomeSRRC approval

Smart lock with peephole camera: approval for the added camera module

Smart home brand · Door lock with peephole camera (added 2.4G camera module)
Certification requirementSRRC change + CCC change
Actual timeline7 weeks
Key blockerA camera module and display were added to an already-certified lock, changing both the RF and the safety structure; the client assumed a simple model extension would do.
What we didRe-assessed as a new product: separate approval for the camera module plus a whole-device change filing, added structural strength and battery safety items, and updated labels and manuals accordingly.
ResultThe change and the new approval were completed together; the old model kept selling while the new one launched on schedule, with no channel stockouts.
SRRC changeCCC changeSeries management
"What we feared most was not knowing what came next. CTLC reports progress proactively at every milestone, and during RF rectification their engineers were on site — issues were aligned the same day."— Hardware lead, a wearable brand
"We planned to submit four locks one by one; after re-dividing the units they compressed them into two, cutting costs by 40%, and later models with the same RF can extend directly."— Certification manager, a smart home brand

About this case library

The cases are grouped into 8 product lines: Wearables(smart watches, bands, earbuds, smart glasses), Smart Home(speakers, door locks, lighting, robot vacuums, control panels), Smart entertainment(AI toys, game consoles, AR/VR, portable projectors), Industrial communication(wireless data terminals, industrial routers, switches, access managers), Sensing & Monitoring(smart sensors, NB-IoT terminals, environmental monitoring), Basic communication(2G–5G terminals, base-station equipment), Satellite & navigation(satellite communications, BeiDou short messages, GPS positioning), Special communication(radar, emergency communications, connected vehicles).

By certification mix, the cases cover CCC Compulsory Certification、SRRC radio transmission equipment type approval、Telecom Equipment Network Access License and parallel multi-certificate filing — four forms in total. The value of multi-certificate combination isn't "fewer agencies to visit" but the same sample batch, the same document set and the same technical state description — that is what actually compresses the timeline.

Timelines and costs in these cases reflect each project's actual situation at the time; different products and lab schedules will produce different results. Please cite the source when quoting. To assess which category your product falls into, submit Free Assessment, or first see 3-Certificate Self-Check。

💬Chat with Us 🧮Instant Quote 📞18927411650 💬WeChat ↑Top