Which handset do I need???

A frequent question we encounter, particularly when replacing a damaged unit, is about handset compatibility. Opting for a new version of the same handset is generally the best choice, though not the only one. But what should you do if that model is no longer available?

Firstly, not all handsets are interchangeable.

The older 5-wire (4+n) analogue handsets were divided into two categories: AC call and Tone call. Any AC call handset could technically work with another AC call handset, and the same goes for Tone call handsets, but you need to know the connection conversion details between the two systems.

With more modern 2-wire handsets, it's essential to stick with the same brand, and sometimes even the specific family of handsets, as they use a form of digital language for communication and are not compatible across different brands or ranges. These handsets often require programming or addressing during installation.

Some systems use 4 wires instead of 5 or 2 wires on a 1+n basis. These are also brand-specific, as the method they use to reduce cabling is unique to each system. Unless you know exactly how they achieve this, you cannot mix them with other systems.

For our 5-wire (4+n) handsets, we can offer a range of universal handsets designed to work with both AC Call and Tone Call systems. Offering you various styles and features. These often include a tuning pot to adjust audio levels to match the system. Older carbon speakers have different audio properties compared to newer mylar plastic ones, and some brands used speakers with different wattages. Some of these handsets offer basic features, while others include additional features for added value.

Most include a connection conversion chart to enable you to check that it is indeed compatible with your existing handset before purchasing.

The good news is that if you can confirm the brand and connection terminals or part number of the existing or old handset, we can advise you on your options moving forward.

Here are some of the “Universal Handsets” we can offer:

Brand	Part #	AC & Tone Call	On/Off Switch	2nd Button	Volume Adjustment	Conversion Guide
Auta	700505	YES	NO	YES	YES	YES
Bitron	AV1407/010	YES	YES	YES	YES	YES
Comelit	2703U	YES	YES	YES	YES	YES
Fermax	3431	YES	NO	NO	YES
Golmar	T-510R	YES	NO	NO	YES	YES
Urmet	1133/15	YES	YES	NO	YES	YES
Videx	3101	YES	NO	YES	NO	NO
Videx	3102	YES	YES	NO	NO	NO

 If in doubt, please call our sales team to discuss your options 020-8361-2444.

Safelink Services Ltd: Your favourite UK Door Entry, Access Control & Intercom System Distributor