Many people have a need to extend chimes to an office in the garden, or to the back of a property, to avoid missing the visitors or deliveries, which can mean delays and inconvenience. While wiring a system is the most robust method, it can be expensive, and a wireless system would seem the most popular option.
Getting a wireless signal from the front, through the house, and out to the back office, puts a limit on the capabilities of standard domestic systems. The first thing to consider is the front door frame. If it is UPVC or a metal type, the wireless signal is significantly weakened before it even enters the property. UPVC door frames have metal supports behind the plastic front, to strengthen them for security purposes, and it is this metal backing that shields wireless signals. It is often better with UPVC door frames, to place the wireless bell push button on a wall to the side of the door frame, or onto the door itself. Alternatively, if it possible to get a small length of wire around the doorframe, then a wired to wirefree converter/extender can be connected to a standard wired bell push button, and send a strong signal from within the property. Wooden doorframes are normally good for wireless systems.
There should be at least 2 chime units running from a single bell push button (always available with a wireless system). For Friedland models, we have found the Libra+ D917s chime to have the longest distance of chimes within their range, and we suggest combining this unit with a Libra+ model D911S or purchasing one of the Twin Packs within the range. Unfortunately, there are no options for boosting signals in the Friedland range. The longest range and most robust are those in the Grothe Mistral range. There are models that can carry distances of both 250m and 500m. Additional wireless bell pushes can be wired internally to the chime units to extend their range, click Here for Booster Diagram. The Grothe Mistral Range has the option of a Twin Pack 600Twin and Twin Pack 400Twin. For Byron models the BY312T Home and Garden kit should be considered. With The new Honeywell DC9xxx series, chime units come with internal wireless extenders so that signals can be bounced from 1 unit to the next to get extra distance
You may also consider the inexpensive new GSM doorbells from Smartbel, which will allow you to be rung on your mobile phone, and to talk to your vistors on your mobile. Smartbel will also link into commonly used home and business DECT phone systems. With a Smartbel doorbell, you can talk to your visitor from anywhere in the world, to re-arrange or re-direct deliveries or just explain that it will take you 30 seconds to get to the front door.
If all domestic chime options fail to bridge the distance by wireless signals, then the only remaining option is a Daitem Wireless Doorphone System. Although these are normally used for door or gate entry, they have the advantage of a long wireless distance of 400m (typical 100m). They also have the advantage of using an intercom handset to talk to visitors, and there is also the option of buying additional handsets to leave around the house to use as a doorbell. The online brochure Doorphone.pdf describes how these systems can help solve the "Office Doorbell" problem.