Tegui Door Entry Systems - Series 7, Series 8, 2-Wire and 4+N: Complete Guide

Tegui Goalkeepers

Tegui intercoms: guide to choosing the right system

Tegui is the reference brand for intercoms in Spain. Its catalog ranges from basic audio systems to video intercoms with WiFi and mobile control. On this page, you will find all Tegui intercoms organized by system, with compatibility and replacement guides.

Differences between Series 7 and Series 8

	Series 7	Series 8
System	2-wire BUS SCS / 4+N / 5 wires	2-wire BUS SCS
Street panel	Sfera New (modular)	Sfera New (modular)
Indoor terminal	T-75 intercom or Classe 100 monitor	Series 8 intercom (374794) or monitor
Camera	Optional (with video intercom)	Integrated in panel
WiFi	With Classe 100X16E monitor	With Classe 100X16E monitor
Recommended use	Replacement and new construction	New installation, maximum quality

Differences between 2-wire and 4+N

	2-wire BUS SCS	4+N wires
Number of wires	2	4 or more
Installation	Simpler and faster	More complex
Scalability	High (adds terminals without construction)	Limited
WiFi compatibility	Yes (Classe 100X)	Not native
Existing installations	New construction or renovation	Buildings before 2010

What each model replaces

Old 4+N intercom → T-71U (374240): direct replacement, same wiring.
Series 7 5-wire monitor → Swing Color Monitor (374455): compatible with existing wiring.
Old 4+N panel → Sfera New panel + adapter: check reference according to installation.
Obsolete complete system → 2-wire Sfera New Kit: complete renewal with new wiring.

Frequently asked questions

Can I replace only the intercom without changing the panel?: Yes, in most cases. The T-71U is compatible with almost all existing 4+N systems. Provide us with the reference of your current panel and we will confirm.
What is the difference between an intercom and a video intercom?: The audio intercom only allows you to talk to the caller. The video intercom adds a camera on the panel and a screen on the indoor terminal, allowing you to see the visitor before opening.
The doorbell does not ring when pressed from outside. What should I check?: Check the doorbell jumper on the intercom (position N, P, or M depending on the available transformer) and that the doorbell wire is properly connected to the panel.
Can I mix Series 7 and Series 8 components?: It is not recommended. Although both use BUS SCS, the Series 8 terminals are optimized to work with the Series 8 panel. For mixed installations, check compatibility.