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Before you answer, a brief audio message plays that tells you which telephone number the caller selected. Only you hear it, while the caller on the other end simply perceives a ringing line.
Whether you route business calls to your mobile and want to know it is a work call before you answer, run multiple webshops each with their own number, or use telephone numbers across different countries: the whisper tone tells you every time which number was dialled, so from your very first word you can answer in the right context.
- Hear a beep or your own short intro
- The message is only audible to you
- Know immediately which number was dialled
See how the whisper tone works
Benefits of the whisper tone
See how our smart tools help your team work more efficiently, save precious time, and noticeably improve the way your business communicates.
Start right
As soon as you hear the set message, you know which telephone number the call came through, so you can open every call in the right language, tone, and context.
Choose your tone
CallFactory offers six clearly distinct alert tones, and if you prefer something bespoke you simply upload your own audio file that fits your brand or workflow.
Stay professional
You always respond with the right language, tone, and department-specific greeting, so you sound consistent and well-prepared on every incoming call.
How the whisper tone works
When someone dials one of your telephone numbers, our platform answers the call and forwards it to your chosen destination, whether that is a landline, a mobile, or a VoIP system. Before the call connects to you, a brief audio message plays that is audible only to your ear. The caller hears nothing special and simply gets a ringing tone in that same instant, while the whisper message tells you which number was dialled so you know what to expect before you say anything.
The whole process takes less than a second, so there is no perceptible silence or delay on the caller’s end. You hear the whisper message, you know what is coming, and you open the call the right way straight away.
Essential for international numbers
Once your business operates across multiple countries — for example an Irish number alongside a German number, a French number, and a Polish number all ringing the same mobile — the whisper tone becomes almost indispensable. Without it you have no way of knowing whether the caller dialled your Dublin, Berlin, or Paris number until they start talking. With the whisper tone you hear “Germany” and open with “Guten Tag” rather than guessing and correcting.
Small teams and sole traders especially benefit, where one person or a handful of colleagues field calls from multiple markets. The whisper tone turns your mobile into a multi-country reception point at that moment, with no need for extra devices or software.
Multiple webshops, one telephone
Many e-commerce businesses run several webshops or brands under one company, each with its own telephone number on the contact page. Without the whisper tone all those calls arrive on the same telephone and you have no idea which shop the customer rang. With the whisper tone you hear “Shop A” or “Shop B” before you answer and greet the customer immediately with the right brand name and context.
The same works for businesses with separate numbers per department — such as sales, support, and accounts — that all land with a small team. The whisper message tells you which number was selected so you greet the caller correctly every time, which eliminates the awkward “Sorry, which company did you say you were calling?”
Forward to mobile without an app
Some VoIP providers force you to install an app on your mobile to separate business calls from personal ones. That approach has some tedious drawbacks, because app-based calls run over the internet and therefore depend on your data connection. In practice that means missed calls, poor audio quality, and dropped connections, especially when you are out and about or in areas with patchy mobile coverage.
There is another issue: not everyone wants to install business software on their personal phone. Asking colleagues to put company apps on their personal device meets resistance, and if someone then refuses or forgets, work calls go unanswered.
CallFactory solves this by routing your business calls directly via the mobile network to your standard mobile number, just like any other phone call. No app is involved and no internet link is needed. The call comes through reliably with normal call quality. The whisper message plays before the call connects, so you know straight away it is a business call and can answer professionally. Your personal number stays personal, your work calls do not get lost, and you do not rely on an internet link.
Six built-in tones or your own recording
CallFactory provides six distinct standard whisper tones so you can assign a different tone to each number and tell them apart instantly. If you prefer something more specific you simply upload your own audio file — for example a spoken “Sales line”, “French number”, or a short jingle that matches your brand. You change the whisper tone whenever you like through the dashboard with no downtime or disruption to active calls.
Simple and at no extra cost
The whisper tone is included at no extra cost with every CallFactory number. There is nothing to install and no per-call charges, so you activate it from the dashboard in a few clicks, assign a tone or recording to each number, and use it immediately.
This feature is included free with every Irish telephone number or international telephone number.
Learn more about other features
Discover more features designed to enhance your business communications.
API integrations
Tell us what you need, we build the endpoints. Our private API lets you integrate CallFactory telephony into your own software — no generic library, no guesswork, no wasted development time.
Calendar-based call routing
Automatically route calls based on your schedule. Office hours, rotating shifts, holidays, and on-call rosters — calls always reach the right person at the right time.
Call filter
Block unwanted callers, allow only authorised numbers, or reroute specific callers to different destinations. The call filter keeps your business lines open for the calls that matter.
Whisper tone FAQ
Find clear answers about Whisper tone and how they work for your business.
No. The whisper tone is only audible to you, the person answering the call. The caller hears a normal ringing tone while the whisper plays on your end. They have no idea a whisper message is being used.
Yes. You can assign a unique whisper tone or custom audio message to each phone number on your account. For example, you might use a beep for your Irish number, a spoken “Germany” for your German number, and “Support line” for your customer phone number. This way, you always know exactly which number was dialled.
The whisper plays in under a second. The caller continues to hear a ringing tone during this time, so from their perspective there is no noticeable delay. The call connects normally as soon as you pick up.
Yes. You can upload your own audio file through the dashboard — a short spoken message, a department name, or anything else you find useful. The file is applied immediately and can be changed at any time without affecting live calls.
This is one of the most common use cases. If your Irish, German, and French numbers all forward to the same mobile, the whisper tells you which country the caller dialled before you answer. You can then greet the caller in the right language from the first word.
Yes. The whisper tone is included at no extra cost with every CallFactory number. There are no per-call charges or setup fees.
Yes. You can enable or disable the whisper tone per number through the dashboard. If you only want it on certain numbers — for example, your international numbers but not your main Irish line — you can configure that in seconds.
No. Unlike some providers that require a mobile app to handle business calls, CallFactory forwards calls directly to your mobile number through the mobile network. No app, no internet dependency, no missed calls. This also means you never have to ask colleagues to install business software on their private phones — there is simply nothing to install. The whisper tone plays automatically before the call connects. All you need is your normal phone.
Yes, this is a common use case. Assign a different phone number to each webshop and set a unique whisper message for each. When a call comes in, you hear which shop the customer is calling about before you answer. This way you can greet them with the right brand name and pull up the right order system immediately.
