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TeleDynamics Think Tank

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: Switches, Network Design, QoS, Routers, VoIP

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

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

How to resolve one-way or no-way audio on VoIP calls

Posted by Daniel Noworatzky on Jul 4, 2018 3:13:00 PM

Unlike conventional telephony infrastructure, which was developed and tailored to be used exclusively for voice, today’s telecom networks accommodate a multitude of different data traffic types, of which VoIP is just one of many. Because of this, it can be challenging to adapt a network to accommodate voice.

One of the most common challenges involves a technology called Network Address Translation (NAT), which for data networks has been a godsend, but if not configured carefully, could cause problems for voice applications. In particular, NAT is a common cause of one-way and no-way audio on VoIP calls.

In this article, we dive into how NAT can impair voice sessions, cite some common symptoms that indicate NAT may be at the root of your call audio problems, and address how to resolve the issues. 

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Topics: Routers, Troubleshooting, SIP, VoIP

Spotlight on ADTRAN

Posted by Daniel Noworatzky on May 30, 2018 3:48:00 PM


This week we focus on ADTRAN, a global provider of telecommunications networking equipment and internetworking products that has stood the test of time in a volatile and dynamic market by maintaining a solid level of market innovation and reliability. In this article we review ADTRAN’s network switches, routers and media gateways.

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Topics: Gateway, Routers, VoIP, Switches

How to hack-proof your VoIP network

Posted by Daniel Noworatzky on Jan 24, 2018 3:49:00 PM

One of the most common matters we discuss with customers on our support calls is network security – specifically, how to lock down SIP Trunks, IP PBXs, SIP phones, and routers from hacking. Here we review different ways hackers can break into your voice network and the steps you can take to secure your system.

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Topics: Routers, Network Security, SIP Phones, SIP, IP PBX

Get high throughput without high cost using Peplink’s Balance Router

Posted by Daniel Noworatzky on Feb 8, 2017 1:55:00 PM

Product review

There are several ISPs (internet service providers) that can provide your business with high- and super-high speed internet access. These technologies include Metro Ethernet and Fiber to the Premises (FTTP) and offer speeds from several Mbps to 1 Gbps and beyond – but with a hefty price tag.  

An alternative is the bonding of multiple ADSL/VDSL or cable lines to take advantage of the aggregate bandwidth of these connections while paying a comparably miniscule monthly cost. All that’s needed is a load balancing WAN router like Peplink’s Pepwave Balance 20 Dual-WAN Router.

Designed for small office and branch office use, not only does the Balance 20 router perform link bonding and load balancing, but it also offers an impressive array of additional features.

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Topics: Business Continuity, Routers

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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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