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TeleDynamics Think Tank

Daniel Noworatzky

Chief Technology Officer, TeleDynamics

Recent Posts

The wonderful world of voice codecs

Posted by Daniel Noworatzky on Jan 23, 2019 10:48:00 AM

Demystifying codecs, part 2

Different VoIP codecs digitize sound differently. Knowing which codec to use for a given application will allow you to better optimize your telephony implementations.

In this article, we examine the most commonly used codecs for VoIP, including the the G.711, G.729, G.722, G.726, iLBC and Opus codecs, and identify the situations for which each one is best suited.

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Topics: VoIP, codecs

What's innovative about the Yealink DECT CP930W conference phone

Posted by Daniel Noworatzky on Jan 16, 2019 10:49:00 AM

Product Review

In today’s fast-paced business world, every minute counts. It can be time-consuming to schedule telephone conference meetings, book meeting rooms equipped with conference phones, and wait for everyone to arrive before beginning. Instead of having the participants come to a meeting, with Yealink’s CP930W conference phone, you can bring the meeting to the participants!

Imagine going to the procurement department, or to the sales department, to meet with colleagues there and bringing your CP930W conference phone with you. Free of wires, you can place it anywhere within your DECT coverage and begin a meeting. You could even make the warehouse an impromptu telephone conference meeting room. 

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Topics: SIP, Yealink, Mobility, Cordless, DECT, conferencing, Productivity, Product Review

Demystifying codecs, part 1: Digitizing the human voice

Posted by Daniel Noworatzky on Jan 9, 2019 10:48:00 AM

Understanding how codecs work

One of the most abstract attributes of Voice over IP (VoIP) is the codec. We may wonder which codec to use in a given situation. Of course, there are general industry guidelines that help us make such decisions, but it can be unnerving to blindly follow recommendations without knowing why. For example, why should G.729 be preferred over the G.711 codec for WAN links? Why should I use G.722 when I don’t have an issue with bandwidth? What are the advantages of iLBC and Opus over the G series of codecs and when should I use them?

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Topics: VoIP, codecs

VoIP security solutions for remote users

Posted by Daniel Noworatzky on Jan 2, 2019 1:47:00 PM


New year, new risks. Let’s talk security.

In today’s digital economy, mobility is not only an expectation, but in many cases, a requirement for workers to successfully fulfill their responsibilities. Security is a key preoccupation for network administrators as they implement voice and data technologies for remote works.

In this article, we’ll review various remote employee voice service scenarios, look at what their potential risks are, and examine the best voice encryption and VPN solution for each case. 

 

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Topics: VoIP, Network Security

How to troubleshoot voice quality problems in VoIP phone systems

Posted by Daniel Noworatzky on Nov 21, 2018 10:46:00 AM

How to deal with jitter, packet loss, latency and signaling delay

Some of the most difficult issues to troubleshoot on a network are failures resulting in a degradation of service, a slowdown in speed, or intermittent connectivity, as opposed to a complete disruption in service.

When it comes to troubleshooting issues involving VoIP, this becomes even more acute. Intermittent, low-quality, and metallic-sounding voice, as well as erratic connectivity between VoIP end devices, are all network problems falling into this difficult-to-diagnose category.

Almost all such malfunctions are due to a faulty implementation (or lack thereof) of quality of service mechanisms. In this article, we will look at some of the most common failures of this type, what they sound like, and what should be done to verify and rectify the problems.

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Topics: Business Telephone System, VoIP, SIP, Troubleshooting

Introducing the Panasonic Mobile Softphone

Posted by Daniel Noworatzky on Nov 14, 2018 10:53:00 AM

Product Review

 

Panasonic has taken advantage of the incredible flexibility that IP telephony provides by introducing its new Mobile Softphone. It integrates with Panasonic IP telephony systems to provide versatile and adaptable unified communication services, anytime, anywhere.

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Topics: VoIP, Peripherals, Mobility, Productivity, Product Review

Quality of Service must-haves for converged networks

Posted by Daniel Noworatzky on Nov 7, 2018 10:49:00 AM

IP Telephony features are not always “plug-and-play.” Rather, they must be configured to function properly. This is equally true when dealing with quality of service (QoS) on a network that transmits both data and voice (i.e., a converged network).

Companies commonly find that when they install their VoIP system on a preexisting data network, it works great at first. Days or weeks later, however, users complain of poor voice quality and intermittent disconnections. The network has not changed, so what’s going on?

In this article, we’ll see why QoS is a fundamental part of your network design for voice, and examine five configurations that should always be employed to achieve high-quality voice on a converged network.

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Topics: QoS, VoIP, Routers, Network Design, Switches

Grandstream’s GXP1610 and GXP1615: Big feature set, small price tag

Posted by Daniel Noworatzky on Oct 31, 2018 10:51:00 AM

Product Review

 

Thanks to VoIP technology, it’s the software, not the hardware, that takes a starring role in a business telephony system. And the sophistication of the software can turn even an entry-level endpoint into a full-service telephony device with the robust feature set that in the past was only available on more expensive phones. For micro- and small businesses that want high-end functionality on an entry-level endpoint with a small price tag, Grandstream has you covered with the GXP1610 and GXP1615 1-line IP phones.

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Topics: SIP Phones, VoIP, Grandstream, Product Review

Grandstream’s GWN7000 series Wi-Fi access points and Gigabit router

Posted by Daniel Noworatzky on Oct 24, 2018 10:51:00 AM

Product Review

 

Since launching its GWN7610 Wi-Fi access point in 2016, Grandstream has grown its GWN Series to include a range of access points plus a Gigabit VPN router to offer a complete wired and Wi-Fi solution. In addition to the GWN7610 enterprise access point (“AP”) we reviewed in 2016, Grandstream has since launched the GWN7600 mid-range AP, the GWN7600LR outdoor long-range Wi-Fi AP, and the FWN7000 enterprise multi-WAN Gigabit VPN router. We take a look at the full series in this article.

 

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Topics: Wireless, Grandstream, Mobility, Routers, Product Review, Wi-Fi

QoS for VoIP networks: IntServ versus DiffServ

Posted by Daniel Noworatzky on Oct 17, 2018 10:48:00 AM

Your customer using a legacy phone system decides to switch to voice over internet protocol (VoIP). They install an IP PBX and buy some IP phones. Great, they’re all set, right? Wrong. Without configuring their data network for quality of service (QoS), they will experience a severe deterioration in voice quality and may regret making the decision to switch. Yes, the IP PBX and the IP endpoints will already be configured for QoS. But what about other parts of the network like the pre-existing routers, switches and firewall? All it takes is one missing link for the whole system to be compromised.

QoS is a big topic. In this article, we’ll look at two main approaches to QoS: IntServ and DiffServ, their strengths and limitations, and when to use which one.

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Topics: QoS, Business Telephone System, VoIP, Routers, Network Design, Switches

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Welcome to our Think Tank

In this blog you'll read our thoughts on business telephone systems. While a lot has changed in telecom since TeleDynamics was founded in 1981, we remain as committed as ever to delivering the best customer service in the industry.

If you would like elaboration on a specific topic, please let us know in the comments section.

Happy reading and thanks for stopping by!

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