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Unlocking Efficient Outreach with Answering Machine Detection by Sigma Voice

Dive into the transformative capabilities of Sigma Voice's Answering Machine Detection feature, a pivotal aspect of its web-based automated calling platform. Understand its importance, functionality, and the edge it provides in ensuring effective communication.


In the realm of automated calling, reaching your intended recipient effectively is paramount. While automated calls simplify mass outreach, what happens when a call meets an answering machine instead of a live person? Enter Answering Machine Detection (AMD) by Sigma Voice – a game-changing feature that streamlines communication and maximizes the impact of your call campaigns.

What is Answering Machine Detection (AMD)?

AMD is a technology that can differentiate between a live human voice and an answering machine or voicemail greeting. Upon placing a call, AMD quickly identifies if the call has been answered by a person or an answering machine, allowing the system to decide the next course of action.

How does Answering Machine Detection work?

There are several different methods that can be used to detect answering machines.

  • Dual-tone multi-frequency (DTMF) detection: This method involves the use of DTMF tones, which are tones that are generated when a telephone keypad is pressed. Answering machines typically generate these tones when a message is left, so DTMF detection technology can be used to detect the presence of an answering machine by listening for these tones.
  • Voice recognition: This method involves the use of speech recognition technology to analyze the voice of the person answering the call. If the voice is determined to be that of an answering machine, the call can be routed accordingly.
  • Behavioral analysis: This method involves the use of algorithms that analyze the call's audio and try to determine the probability that a human or machine answered the call.
  • Caller ID: This method involves the use of Caller ID information to determine whether the call has reached an answering machine. The answering machine will typically have a caller ID of "out of area" or "anonymous".

Why AMD is Essential

  • Tailored Responses: With AMD, Sigma Voice's platform can be programmed to leave a pre-recorded message on an answering machine or proceed with interactive options when a live person answers.
  • Efficiency: Eliminate wasted time and resources. Instead of waiting for the entire voicemail greeting to finish, AMD quickly determines the call outcome, ensuring more calls in less time.
  • Improved User Experience: Recipients are met with content tailored to their response, whether it's them answering in person or their voicemail greeting.

Sigma Voice's AMD: A Notch Above

  • Accuracy: With advanced algorithms, Sigma Voice's AMD boasts of high accuracy rates in detecting answering machines versus live answers.
  • Flexibility: Seamlessly integrated into the Sigma Voice platform, users can easily customize call actions based on AMD outcomes.
  • Compatibility: Designed for the web-based platform, Sigma Voice's AMD works effortlessly whether accessed via PC, iPhone, or Android.


In an age where efficient communication holds the key to engagement and success, features like Answering Machine Detection are not mere add-ons but necessities. Sigma Voice, with its sophisticated AMD technology, ensures that automated calling is not just about volume but also about the quality and relevance of interactions. As we continue to lean into technological advancements to refine our outreach strategies, Sigma Voice's AMD stands as a testament to the power of intelligent communication.

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Haith Johnson

Retail Store

Absolutely LOVE THIS SERVICE!!! I recommend using Sigma Voice for any growing business!! We have got great responds & is a good way to stay in touch with your customers base! Helps us to turn customers to Loyal Customers to VIP Customers!!!

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Mark Hamilton

Nonprofit Organization

Sigma Voice exceeded our expectations for our call out needs. When we needed changes made they were happy to do so and performed changes in a timely manner. I highly recommend Sigma Voice.

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Ken Doke

Nonprofit Organization

I have been using Sigma Voice for a few years now on a number of campaigns. They have always been reliable and competitive. Their customer service is phenomenal. I highly recommend.

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Emma Otto

Retail Store

We have used SigmaVoice for our business for a few years now, and it has been a very good experience. The website is simple, straightforward, and easy to navigate. Customer service is excellent; professional and prompt.

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Andrenia Burgis

Political Campaign

This is the first time I used this company and am extremely pleased with the excellence in customer service. There was no need large or small that was not met. I highly recommend them!!!

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Kristin Taylor

Senior Living

Sigma Voice was so easy to set up. I needed to get an immediate message out to my 60+ family members. It’s affordable, the reports are amazing, and the customer service is beyond what I expected on a Sunday afternoon. Highly recommended!

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Pedro Hernandez

Medical Offices

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