The volume is so low it's not audible, can this be fixed?

you CAN later the volume, turn variable resistor P2 inside just below the wires

how long is the wiring?

There is no cable included internally. If you mean how much cable do you need to reach the connections then not very much as there are plenty of holes in the back, but the more cable you have coming out of the wall the more flexible your mounting options will be.

What sound does this make please?

A quite harsh flat-sounding buzzer. There is no volume control. It's not a pleasant noise, but you won't be able to ignore it.

I have 8 wires coming out of wall (red, green, white, brown, blue). how do i connect it?

No real answer here. You need to establish what colours were used by the original installer. Can you get acess to the main external buttons? Did you take note of the connections of the previous handset? Its selv so dont be afraid to try different connections to get it working. The best way is to use a multi meter to find your +12v and 0v then find the lock activation by shorting it on +12v (the lock will buzz) then if memory serves me correct just switch the speech and ring until it works. No damage can be done to the unit. Im a spark and this is how ive sorted it before

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FERMAX 3431 Loft 4+N - Universal door telephone, 5-wire wiring system, gypsum mount

Product ID: 51571599

Details

Answering system type
Digital
Brand
FERMAX
Colour
Black
Compatible devices
PSTN (Public
Dialler type
Single Keypad
Item dimensions L x W x H
8.8 x 5.8 x

🔌5-wire universal wiring

🖤Sleek black ABS build

🛠️Easy DIY installation

Description

🔔 Upgrade your entryway game with the FERMAX 3431 Loft 4+N—where smart meets sleek!

CORDED RELIABILITY - No batteries needed—enjoy uninterrupted, dependable communication every time.
EFFORTLESS DIY SETUP - Clear wiring manual and intuitive design make installation a breeze for any savvy professional.
COMPACT LIGHTWEIGHT - At just 300g and slim dimensions, it fits discreetly without compromising style or function.
PREMIUM DURABLE BUILD - Crafted from robust ABS material for a sleek, long-lasting finish that complements modern interiors.
UNIVERSAL 5 WIRE COMPATIBILITY - Seamlessly fits most existing door telephone systems—ditch the specialist hassle!

The FERMAX 3431 Loft 4+N is a universal door telephone featuring a 5-wire wiring system designed for easy gypsum mounting. Made from durable ABS plastic in a stylish black finish, it offers reliable corded communication without the need for batteries. Its compact size and comprehensive wiring manual empower professionals to effortlessly replace or upgrade existing intercom systems, saving time and specialist costs.

Specifications

ASIN	B00A3APXP4
Answering System Type	Digital
Brand Name	FERMAX
Colour	Black
Compatible Devices	PSTN (Public Switched Telephone Network)
Customer Reviews	3.9 3.9 out of 5 stars (5,027)
Dialer Type	Single Keypad
Enclosure Material	Acrylonitrile Butadiene Styrene (ABS)
Global Trade Identification Number	08424299033990
Is there Caller ID	No
Item Dimensions	8.8 x 5.8 x 25.8 centimetres
Manufacturer	Fermax
Manufacturer Part Number	3431
Model Number	3431
Multiline Operation	Multi-Line Operation
Number of Items	1
Phone Talk Time	21 Minutes
Power Source	Corded Electric
Recording Capacity	21 Minutes
Telephone Type	Corded
UPC	634563167919 793518129669

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