The Tegui T-71U, reference 374240, is a white handset for conventional 4+N automatic door entry installations. It is a replacement option that must be selected by identifying the system and the old model, not solely by the brand or the colour of the wires.
This guide explains how to assess compatibility, what 4+N means, how to use an equivalence table and which documentation to consult before replacing a handset. It includes links to the manuals available from Tegui Distel and the manufacturer.
Check the updated price of the Tegui 374240 T-71U
What the T-71U is and what it is used for
The store product sheet identifies the 374240 as a conventional 4+N audio handset with a receiver, door release and white finish. It is not a video monitor or Wi-Fi equipment.
The term universal should be understood within the scope of the conventional installations covered by its documentation. It does not mean that it replaces any digital, BUS, two-wire or other-brand handset.
Purchase features and scope
| Appearance | Tegui T-71U |
|---|---|
| Reference | 374240 |
| Model | T-71U |
| Equipment type | Audio indoor handset |
| System indicated in the product sheet | Conventional 4+N |
| Colour | White |
| Opening function | Yes, with compatible installation |
| Installation | Wall-mounted |
| Replacement selection | By system, model and equivalence documentation |
Buying an indoor handset is not the same as buying a complete door entry system. The existing entrance panel, power supply, lock and wiring must be reviewed when considering a replacement.
What 4+N means
In the conventional 4+N designation, the four conductors correspond to common system lines and N represents the call lines for the homes. This does not mean that exactly four wires must literally be found in each handset.
The number of visible wires is not enough to identify the technology either: there may be unused conductors, splices, auxiliary functions or previous modifications. The device model and wiring diagram are the useful references.
4+N is not the same as a two-wire BUS
Equipment designed for conventional installation does not become compatible with a BUS system by changing the order of the wires. Do not choose the T-71U as a replacement for a digital or BUS handset without documentation confirming the specific case.
Tegui T-71U terminals: function of each connection
The Series 7 mounting and configuration sheet provided for this guide, identified by code 2537104, describes the following terminals of the T-71U. This description applies to this model, not to all Series 7 telephones.
| T-71U terminal | Terminal description |
|---|---|
| 1E | Electronic call |
| 1Z | Buzzer call |
| 2 | Common ground |
| 3 | Door opener |
| 4 | Microphone |
| 5 | Speaker |
| P and P | Auxiliary |
Terminals 1E and 1Z correspond to different call types. The choice must be made according to the system and the applicable equivalence row, not by connecting both experimentally. Auxiliary terminals must also not be connected without checking the diagram for the intended function.
Configuration jumper: common or separate grounds
The sheet distinguishes position 1: common grounds and position 2: separate grounds. It specifies position 1 except for the handsets indicated in the table. Before changing it, check the exact row and its notes: this general instruction does not replace the documented exceptions.
Independent audio adjustment
The T-71U allows separate adjustment, using two potentiometers, of the audio received by the handset and the audio sent to the entrance panel. The drawing identifies the microphone and speaker adjustments separately. Before adjusting, check that the connections match the diagram; a volume adjustment does not correct an incorrect terminal assignment.
Mounting and recommended height
The sheet shows opening, mounting on a universal box or wall, and closing the handset, with a recommended height of 1.60 m. It is the document's mounting guidance: consider the location, cable routing and users' needs before securing it.
Compatibility with Fermax, Golmar, Auta and Urmet
The table kept by Tegui Distel is titled Equivalence table for T-71U, reference 374240 and contains rows for specific models. Compatibility should not be summarized as “works with any Fermax” or “works with any Golmar.”
| Brand or family | Examples identified in the table | What to check |
|---|---|---|
| Fermax | Citymax, Cóndola and other specific rows | Exact model and applicable row; do not extrapolate to the brand's digital systems |
| Golmar | T-600, T-800, T-1000 and other specific rows | Specific reference and stated configuration conditions |
| Auta | 8400, TF89 and TF92 | Model, terminal and system match |
| Urmet | 730, 930, 1030, 1130 y 1131 | Variant and correspondence of the row used |
| Tegui | GL, Horizon and T-200, among other rows | Model and call type; do not treat all Tegui handsets as equivalent |
This table summarizes models included in the store's equivalence document. It does not replace the terminal assignments in the original document or establish compatibility for unidentified variants.
If you only know the brand
Look for the reference on the label or inside the device with the help of a professional. A front-facing photograph helps identify it, but does not always distinguish systems that share the same housing.
Complete terminal equivalence table for the T-71U
The following image reproduces the table kept by Tegui Distel for the T-71U 374240, including its headings and configuration note. Check the exact model row; do not replace one row with another from the same brand.
Open the complete equivalence table at original size
If a character or reference is not clearly legible, do not deduce the connection: check the manual or request assistance. The table includes a note about the position of the configuration jumper that must be retained when interpreting the row.
Terminal equivalences: not color-based connections
The color of the cable does not determine its function. There is no universal assignment valid for all installations. A red wire may be connected to a different terminal in another home or may have been reused during a repair.
The correct equivalence compares the terminal identification of the old device with that of the new one, using the exact row and the conditions in the manual.
How to use the table correctly
- Identify the manufacturer, model, and technology of the old equipment.
- Photograph and note which terminal each conductor is connected to before removing it.
- Locate the exact model row in the T-71U table.
- Review the notes and call configuration corresponding to that row.
- Cross-check the assignment against the manual and diagram before connecting.
- Check the call function, two-way audio, and door release once the work is complete.
The table includes configuration columns and notes. It is not advisable to copy only a sequence of numbers without their headings. That is why this guide reproduces the complete table instead of providing abbreviated connections that could omit important conditions.
Cable record before disassembly
Prepare a record with four details for each conductor: your own cable identification, the old terminal, the equivalence row and column used, and the confirmed new terminal. The color can help you physically identify the conductor, but it does not define its electrical function. If several wires are connected to the same terminal, record that circumstance as well.
If there are loose wires or modified connections
A cross-reference table does not automatically reconstruct an installation whose original state is unknown. If the device is already disconnected, there are unidentified wires, or tests have been carried out by changing connections, request a technical inspection before proceeding.
Call and configuration: an important detail
The T-71U table distinguishes call columns and includes notes regarding the position of a configuration jumper. Identifying the old model is not enough if those conditions are not also checked.
The installation sheet indicates position 1 as a general rule and refers to the exceptions in the table. The specific selection must comply with the manual and the installation. The absence of a call does not in itself prove that the device is faulty.
Before replacing the intercom handset
Document the original state and explain what you want to resolve: broken device, no call, poor audio, or unlocking failure. Replacing the internal unit does not guarantee solving a problem originating in the entrance panel, power supply, lock, or wiring.
Information we need to assess the replacement
- Brand and reference of the old intercom handset.
- Front photograph and identification label.
- Legible photograph of the terminals and connections, taken safely.
- Indication of whether calling, audio, and unlocking worked previously.
- Information about changes or disconnections already made.
- If possible, identification of the entrance panel and system.
Do not send only a list of colors. What is useful is knowing which terminal each conductor was connected to.
Tegui T-71U installation: work organization
This summary is intended to prepare for a replacement; it does not replace the manual or professional checks.
- Validate compatibility. Identify the system and model before purchasing.
- Record the connections. Photograph and note the original state before dismantling.
- Check the installation. Check the mounting, cable routing, and available wall space.
- Use the documentation. Use the corresponding diagram, equivalence row, and configuration.
- Perform the tests. Test calling from the entrance panel, two-way conversation, and unlocking.
- Keep the record. Save the reference and replacement documentation for future inspections.
Avoid handling the power supply or common elements of a communal installation. If you cannot safely identify the connections and system, use a qualified installer.
Final check before closing the device
Place a call from the entrance panel and check that it is received, that you can hear the visitor, that the visitor can hear the response, and that unlocking works. Recording each result makes it possible to distinguish a call, audio, or unlocking fault. If the problem already existed before the replacement, do not automatically attribute it to the new handset.
Common practical cases
Old conventional intercom handset that was working
The most valuable information is its model and the original terminal layout. A replacement must preserve that record and compare it with the table, rather than moving wires according to their physical position on the terminal strip.
Intercom handset with no legible reference
Photos of the device, circuit, and connections can help identify it, but equivalence should not be guaranteed based solely on outward appearance. An inspection in the home may be necessary.
Installation already disconnected
If there is no record of the initial state, do not try random combinations. The table links equipment and terminals but does not assign functions to unidentified conductors.
Digital or two-wire equipment
A replacement compatible with that system must be chosen. The conventional T-71U is not a generic replacement for every digital unit.
Common problems after replacement
| Symptom | What to check | What not to assume |
|---|---|---|
| It does not ring | Model, call correspondence, and the configuration specified in the manual | That the new device is faulty |
| You can hear audio in only one direction | Terminal correspondence and connection condition | That the colors correctly define each function |
| The door does not open | Compare its previous operation and check the door-release circuit | That replacing the handset will fix a lock fault |
| Audio and door release work, but there is no call | Check the call function and configuration settings specifically | That the entire installation is incompatible based on that single symptom |
| The replacement does not improve the old problem | Check the panel, power supply, wiring, and other system components | That the fault necessarily comes from the indoor unit |
These checks help guide the review but do not establish a definitive diagnosis. Describe the symptom and attach references and photos of the original connections when requesting assistance.
Frequently asked questions about the Tegui 374240
Does universal mean compatible with all brands?
No. The system and specific model must be verified. The same brand may market technologies that are incompatible with one another.
Does it work with a Fermax?
The table contains specific Fermax models. We need to identify which one you have before recommending a replacement.
Does it work with Golmar, Auta, or Urmet?
The table contains references from those brands, but it does not confirm compatibility with every device from them.
Can I connect it according to the colors?
No. The original terminals must be documented, and the applicable wiring diagram or equivalent must be used.
Does 4+N mean it has four wires?
No. It is a designation for the conventional system; the installation cannot be identified by counting only the visible wires.
Is it a two-wire handset?
The product information identifies the T-71U 374240 as a conventional 4+N model, not as a two-wire BUS unit.
Does it have video, Wi-Fi, or an app?
It is not presented as a connected monitor: it is a conventional audio handset.
Does it include an outdoor panel and power supply?
This purchase is for the indoor handset, not a complete installation kit.
Can I keep the wiring?
Its condition and compatibility with the system must be checked. This cannot be guaranteed based solely on the appearance of the old equipment.
Is there a valid jumper position for everyone?
No. The document indicates position 1 except for the exceptions shown in the table. Consult the corresponding row.
What should I do if my reference does not appear in the table?
Don't choose a row based on resemblance. Request system identification and specific documentation before connecting.
Do the terminal numbers mean the same thing across all brands?
It should not be assumed. Precisely, the equivalence table compares different identifications between specific devices.
Installation manuals and documentation
The following files are available for the T-71U on Tegui Distel. Use the complete document and check the reference and revision before taking action.
T-71U installation PDF, file identified on Tegui Distel as a manual in Spanish
T-71U installation PDF available from Tegui Distel
These files are provided as preserved in the store. They are not presented as two different translations or as certified manuals for other languages.
International manufacturer information
BTicino: manufacturer's international website
This link provides general access to the manufacturer, not a specific T-71U data sheet or confirmation of equivalences. To search for international documentation, use reference 374240 and always verify that it corresponds to the model and system. Tegui and BTicino brands are not presented here as interchangeable.
Search from other countries and in other languages
Commercial names, references, and systems may vary between markets. The fact that a handset resembles the T-71U or is called universal in another country does not guarantee that it uses the same configuration. For documentation in English, French, or Italian, the reference and exact document must be verified first; this guide does not link to unverified translations.
Useful terms for identifying international documentation
| Language | Indicative search term | Information you must keep |
|---|---|---|
| Spanish | Conventional intercom handset, installation manual | T-71U 374240 and 4+N system |
| English | Analog intercom handset, installation manual | Exact reference and technology |
| French | Analog intercom handset, installation manual | Exact reference and technology |
| Italian | Analog intercom handset, installation manual | Exact reference and technology |
These terms help you search for documentation; they are not equivalent commercial names and do not prove compatibility between models. An indicative translation does not replace the manufacturer's diagrams either.
Buy the Tegui T-71U 374240
If you're looking for a replacement for a conventional 4+N system, consult the T-71U data sheet and confirm that your model is equivalent before buying.
View updated price and buy the Tegui 374240 intercom handset
Don't know whether it matches your installation? Provide us with the reference of the old device, photographs of the original terminals, and a description of the problem. Correct identification is more useful than a generic color chart.