Which intercom handset replaces yours?
Before buying, identify the old model and the installation technology. Counting the wires or choosing a device from the same brand is not enough.
Not sure which one to choose? Send us a front-facing photo, another showing the reference number, and a clear photo of the inside with the wires still connected and the terminal numbers visible. If possible, include the reference number of the entrance panel and power supply.
Ask Tegui Distel before buying a replacement →
Quick guide to choosing a replacement
This table provides technology-based guidance. It is not an automatic model-to-model equivalent: the existing equipment and its configuration must be checked.
| Identified system | Handset to consider | What to check before buying |
|---|---|---|
| Conventional 4+N | 374240 Tegui T-71U | Old model, terminal mapping, and call type. Not a direct replacement for 2-wire BUS handsets. |
| Teguibus / digital T-72 | Specific replacement part for the installed system | Do not replace with a T-71U or a 2-wire handset without confirming the technology. |
| Compatible 2-wire BUS | 374290 Tegui Series 7 or 374794 Tegui Series 8, depending on the installation | Handset reference number, entrance panel, power supply, and configuration. Having two wires does not confirm compatibility. |
| Unknown system | Ask before placing your order | Send photos of the device, label, and connections. |
Before dismantling: photograph the connections
Take a clear photo of the wires and the numbers or letters on all the terminals. Do not disconnect everything at once: identify each wire before removing it.
Wire colors are not standardized across installations. A blue wire does not necessarily have the same function in two homes. Equivalents are identified by terminals and functions, not by colors.
Tegui T-71U 374240: replacement in compatible 4+N installations
The T-71U is an option for certain conventional 4+N intercom handsets. The term “universal” does not mean it works with every intercom system.
Before connecting it, find the documented equivalent for the old model and check the call input and any jumper specified for that installation.
T-71U terminal functions
| Terminal | Function |
|---|---|
| 1Z | Buzzer call |
| 1E | Electronic call |
| 2 | Common |
| 3 | Door release |
| 4 | Microphone |
| 5 | Speaker |
| P | Connection or jumper according to the documented model configuration |
This table describes the functions of the new handset; it does not replace the terminal-by-terminal mapping for the old intercom handset.
See the 374240 Tegui T-71U and its current price →
How to use a documented equivalent
- Identify the brand, reference number, and technology of the old device.
- Photograph the wiring before disconnecting it.
- Find the model-specific table and check the terminal connections.
- Label the wires and connect each function to the corresponding terminal.
- Check the call, two-way audio and door release.
If you can’t identify the system or the equivalent model, consult an installer before proceeding.
Handsets for 2-wire BUS installations
2-wire BUS systems use a different technology from conventional 4+N. They are not connected using the T-71U function table.
Depending on the existing system, handsets such as the 374290 Tegui Series 7 or the 374794 Tegui Series 8 may be suitable options. Check compatibility and configuration before choosing one.
Tegui and BTicino are different brands. Don’t assume two handsets are interchangeable based on their brand, appearance or number of wires.
Mistakes to avoid
- Buy solely because the old device has five wires.
- Copy the connections by color.
- Confuse Teguibus with 2-wire BUS.
- Assume that “universal” means compatible with all systems.
- Remove all the wires without photographing or labeling them.
Frequently asked questions
Can I replace a five-wire audio handset with a two-wire one?
Not directly if they use different technologies. Switching from a conventional system to BUS may require changes to other components in the installation.
Can I replace a Tegui T-72 with a T-71U?
They are not direct replacements: the digital T-72 and conventional T-71U work with different systems.
What’s the difference between 1E and 1Z?
1E is the input for an electronic call, and 1Z is for a buzzer. Use the one that corresponds to the existing installation.
What should I do if there’s no brand or legible reference?
Take photos of the device and its terminals, and try to identify the outdoor panel or a handset in another home in the building. Don’t choose a replacement based only on the number of wires.
Can I replace a video monitor with an audio handset?
It depends on the system and the equipment installed. The monitor reference and technology must be checked before recommending an audio handset.
Still unsure about the replacement?
Ask us before buying. Send us the reference and photos of the handset, its connections and, if possible, the outdoor panel. This will help us find the right replacement without relying solely on the device’s appearance.
Ask Tegui Distel about my audio handset →
Looking for video monitor equivalents?
This guide focuses on audio handsets. If your equipment has a screen and you want to replace an old Tegui monitor, see our Tegui monitor compatibility guide.