Improving Audio Quality with Analog Telephone Adapter (ATA)

  • On November 20, 2016
Background One of the first steps SMBs take towards VoIP is to add ATA to their existing analog telephone network. There are many well known brands of ATAs in the market today like Linksys PAP2, Cisco PAP2T, Grandstream HandyTone and others. Regularly we are requested to improve audio quality in such telephony systems – especially […]
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Echo Cancellation with Flash Clients

  • On November 20, 2016
Background In the beginning of this year, Adobe has released an acoustic echo cancellation as an integral part of its platform. Based on the feedback we are getting, the problem of echo was successfully reduced but not in all environments and especially not in environments that include mobile platforms.  SoliCall’s network echo cancellation technology could […]
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Why we got used to ambient noise in telephony?

  • On November 20, 2016
Background If we just got a penny every time we heard the sentence:  “Our telephone equipment provides a superb audio quality… it could not be better…”.  Unfortunately, although this sentence is commonly used, it is one of the biggest self-deception in the industry.   When your friend calls you from the Mall or from the […]
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Installing PBXMate with Elastix – Phone Setup

  • On November 19, 2016
  Background In a previous post we reviewed the basics of installing of PBXMate with Elastix. In this post we will review how to configure your phones to work with PBXMate. This post will discuss the configuration for VoIP phones.  In a future post we will review the configuration required for analogue phones.
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Tips for Installing PBXMate in a Distributed VoIP Network

  • On November 19, 2016
Background Many VoIP network administrator face a common problem that their users complain about the quality of their phone calls. The most common complains are about noise, echo and other artifacts. If the network is distributed, it becomes very difficult to analyze and control the multiple components in the network starting from the end devices […]
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Echo Cancellation, Art or Science? Part I

  • On November 18, 2016
Background First, let us apologize that this post is going to be a bit technical. Don’t worry we will try to keep it as simple as possible.  Echo cancellation, and more specifically Acoustic Echo Cancellation (AEC) is theoretically a very simple algorithm. The AEC algorithm receives a reference signal (i.e. the audio played to the […]
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Isolating the audio in VoIP networks

  • On March 2, 2016
Background In this post we would like to share with you a rare phenomenon we have seen in few sites that once it appears, it can cause a head ache to the network administrator. As opposed to the old telephony networks that was based on dedicated physical cables per call, usually twisted pair, the cables […]
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Tips for Developing VoIP on Mobile Devices (Android,iOS,…)

  • On August 1, 2011
CPU Consumption One of the main problems in mobile devices is their limited CPU Power. As a result the delay in the audio signal is increased and from time to time portions of the audio signal might get lost. In order to resolve these problems, you need to verify that your VoIP application is optimized […]
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Critical Factors to Assure High Audio Quality in VoIP

  • On April 1, 2011
Background Many organizations today want to deploy / develop VoIP applications. The need for audio communication is required for many applications like customer support, internal communication between employees etc. VoIP is used as the underlying technology because it is the industry standard for voice communication, it can give high quality and it is usually a […]
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