D.T.MUX Viewer Professional subscription terms
Issue B — 5 October 2026
Terms of the free trial and of the D.T.MUX Viewer Professional subscription, which opens Chapter 10 recordings from other manufacturers in D.T.MUX Viewer.
Download the PDF Issue B, to keepArticle 1 — Purpose, parties and customers
These terms govern the D.T.MUX Viewer Professional trial and subscription (the "Service"), offered and sold by Étude Technique en Électronique Professionnelle (ETEP), a French SARL with a share capital of €68,603, registered with the Toulon Trade and Companies Register under number 391 495 108, EU VAT number FR24391495108, whose registered office is at ZAC des Bousquets, 380 rue de l'Initiative, 83390 Cuers, France ("ETEP").
The Service is reserved for businesses (companies, public bodies, teaching or research institutions) and associations, which use it for the purposes of their activity (the "Customer"). It is not offered to consumers. When subscribing, the Customer declares that it is acting in that capacity.
These terms supplement the D.T.MUX Viewer end-user licence agreement (the "Licence Agreement"), accepted when the software is installed. In the event of any conflict regarding the trial or the subscription, these terms prevail.
ETEP's general conditions of sale, which govern its sales of equipment and services, do not apply to the Service.
The Customer accepts these terms by ticking the box provided for this purpose in D.T.MUX Viewer, when starting the trial and when subscribing, and then on the payment page. They are available at any time at www.etep.com/terms/viewer-professional.
Article 2 — Sale and payment collection: Link (Stripe group)
ETEP sells the subscription. Ordering, payment, issuing receipts and invoices, calculating and remitting indirect taxes, payment support, refunds and payment disputes are handled, on ETEP's behalf, by Sold through Link, LLC, a Stripe group company ("Link"), the merchant of record for the transactions.
Link acts in its own name towards the Customer: the purchase is shown as "Sold through Link" and the bank statement shows "LINK.COM* ETEP VIEWER". Payment made to Link discharges the Customer's obligation to pay ETEP. At checkout, the Customer accepts the "Sold through Link" terms (link.com/terms), which govern the order and the payment.
The licence to use the software is granted to the Customer by ETEP, under these terms and the Licence Agreement; ETEP remains solely responsible for the Service. No card details are entered in D.T.MUX Viewer or received by ETEP.
ETEP may entrust payment collection to another provider or handle it itself through Stripe. The Customer is informed by email before the renewal concerned; where applicable, it will have to register its payment method again. Its other rights are not affected.
Article 3 — What is free, what the Service covers
Opening and working with D.T.MUX files (.mux) and IRIG 106 Chapter 10 recordings produced by ETEP equipment in D.T.MUX Viewer is free of charge, with no account, no connection and no time limit. It is not part of the Service.
The Service gives access, in D.T.MUX Viewer, to opening IRIG 106 Chapter 10 files and network streams recorded or transmitted by other manufacturers' systems, together with the software functions that apply to them.
Article 4 — Free trial
A free thirty (30) day trial is offered, with no payment method required. It starts the first time a recording or stream from another manufacturer is opened on the computer concerned, never at installation. Only one trial is granted per computer.
When it ends, opening such recordings and streams requires a subscription; recordings from ETEP equipment remain accessible free of charge.
Taking out a subscription during the trial ends the trial: the subscription starts and is billed immediately, and any remaining trial days are not carried over.
Article 5 — Price, taxes and currency
At the date of these terms, the subscription price is ninety-nine euros excluding taxes (€99 excl. VAT) per month and per computer. The applicable price is the one displayed at the time of subscription.
Applicable taxes (VAT or equivalent tax) are calculated by Link according to the Customer's country and, where applicable, its tax identification number, and added to the price. The Customer sees the amount excluding taxes, the taxes and the total amount before paying.
Link may offer the Customer to pay the equivalent of this price in its local currency, at the exchange rate it applies, including a mark-up; the Customer may choose to pay in euros. The converted amount may vary from one billing period to the next.
Article 6 — Term, renewal and cancellation
The subscription runs for one month and renews automatically from month to month, at the same price unless a change is notified under Article 10, until cancelled. It is payable in advance at each renewal.
The Customer may cancel at any time, at no cost and without giving reasons, from its Link account (link.com) or from the customer portal available from D.T.MUX Viewer. Cancellation takes effect at the end of the current period, until which the Service remains available. The current period is not refunded, subject to the refund policy.
Deleting the Customer's Link account, or asking Link to erase the Customer's data, ends the subscription as soon as Link processes the request.
ETEP may terminate the subscription if the Customer seriously breaches these terms or the Licence Agreement, in particular by circumventing the technical measures, after a formal notice that has remained unanswered for fifteen (15) days; with immediate effect in the event of fraud.
Article 7 — One computer at a time
A subscription is active on only one computer at a time. The Customer may transfer it to another computer by deactivating the first one ("Deactivate this computer" in D.T.MUX Viewer), or with the help of ETEP support, in particular in the event of a breakdown, loss or replacement. To use the Service on several computers at the same time, the Customer takes out one subscription per computer.
Article 8 — Licence verification and offline use
D.T.MUX Viewer verifies the trial or subscription with ETEP's licence server. It remains usable for up to seven (7) days without a connection; beyond that, opening recordings from other manufacturers requires a new verification. Recordings from ETEP equipment remain usable at all times, even if the licence server is unavailable.
ETEP uses its best efforts to keep the licence server available, without guaranteeing uninterrupted availability. Maintenance interruptions are kept as short as possible and scheduled where possible.
Article 9 — Payment failure
If a payment fails, Link informs the Customer and retries for about two weeks. The Service remains available for seven (7) days from the first failure, to allow the payment to be settled. Otherwise, access to the Service is suspended until payment is made, and the subscription ends if no attempt succeeds.
Article 10 — Changes to the Service and to the price
ETEP may develop D.T.MUX Viewer and the Service (new versions, functions), without substantially reducing, during a paid period, the access described in Article 3.
Any price change is notified to the Customer by email at least thirty (30) days before the renewal at which it applies. The Customer may cancel before that renewal; otherwise, the new price applies from it.
Article 11 — Support
Licence support (starting the trial, activation, change of computer, sign-in code not received) is provided by ETEP at licences@etep.com, in French and English, on working days. Questions about payments, invoices and refunds are handled by Link (support.link.com, "Sold through Link" section); ETEP can also forward them.
Article 12 — Warranty and liability
ETEP warrants that the Service enables, in accordance with the D.T.MUX Viewer documentation, the opening described in Article 3. If a non-conformity is reported, ETEP will endeavour to remedy it within a reasonable time; failing that, the period concerned is refunded. This is the only warranty given for the Service.
D.T.MUX Viewer is a replay and analysis tool. It is not software certified under aircraft airworthiness standards and must not be the sole basis for a decision on the airworthiness or safety of an aircraft; the interpretation of the data and the decisions based on it are the Customer's responsibility.
To the fullest extent permitted by law, ETEP is not liable for indirect damage (loss of data, business or revenue, business interruption), and its total liability in respect of the Service is limited to the amounts paid by the Customer for the Service during the twelve (12) months preceding the event giving rise to liability. These limitations do not apply in the event of gross negligence or wilful misconduct, or to personal injury.
Associations and other non-professionals retain the rights that the law mandatorily grants them; the above limitations apply to them only to the extent permitted by law.
Article 13 — Personal data
The Service processes only a limited amount of personal data, described in ETEP's privacy policy (www.etep.com/privacy): a pseudonymous identifier of the computer, the software version and language, the status and dates of the trial or subscription and, if the Customer signs in, their email address. The Customer's recordings are never transmitted to ETEP.
Link and the Stripe group companies process order and payment data as separate data controllers, under Link's privacy policy (link.com/privacy). Link provides ETEP with the order data (contact details, billing address, tax identification number, order details), which ETEP processes under its own policy.
Article 14 — Regulations and sanctions
The Customer undertakes to use the Service in compliance with the laws applicable to it, in particular export control regulations and restrictive measures (sanctions). The Service is not offered in the countries or to the persons targeted by such measures, nor in the countries where Link does not offer its services; ETEP and Link may refuse or interrupt the Service in such cases.
Article 15 — Business customers
As the Service is reserved for businesses and associations (Article 1), the Customer warrants that the declaration made when subscribing is accurate. A subscription taken out by a consumer, contrary to that declaration, may be terminated by ETEP, which then refunds the current period.
The protective provisions that the law mandatorily grants to associations and other non-professionals prevail over any conflicting provision of these terms.
Article 16 — Changes to these terms
ETEP may change these terms. Changes are notified to the Customer by email at least thirty (30) days before they take effect and apply from the next renewal; the Customer may cancel before that renewal.
Article 17 — Governing law, language and disputes
These terms are governed by French law. The French version prevails; the English version is provided as a translation.
Any dispute with a business Customer falls under the exclusive jurisdiction of the Toulon Commercial Court (Tribunal de commerce de Toulon). Non-professional Customers retain the benefit of the rules of jurisdiction and mandatory provisions that protect them.
A question about the subscription or a licence? Write to licences@etep.com. See also the refund policy and the privacy policy.
Contact: ETEP — licences@etep.com — ZAC des Bousquets, 380 rue de l'Initiative, 83390 Cuers, France — +33 4 94 08 50 26.