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QoS For FaceTime, bandwidth requirements and Firewall config

By On January 3, 2013 · In Apple, FaceTime, Prioritization and traffic shaping, QoS - Quality of Service, VoIP calls quality

Facetime – Calls Quality, QoS and firewall ports in use

Video calling will become an increasingly widespread form of communication in coming years, moving from
broad adoption in the consumer market to selective endorsement in the corporate world. The same executives
who video-call their families when on the road will also use FaceTime [...]

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TCP vs UDP – you must know this

By On December 12, 2011 · In Prioritization and traffic shaping, SIP protocol, VoIP calls quality

I think TCP is an overused protocol and  I think that UDP is an underused protocol.

This is an argument I’ve been having quite a bit with people lately, so I’ve decided i’ll lay out my reasoning here so I don’t have to type or recite it at people over and over. Understanding how TCP [...]

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Wi-Fi access point/router optimization for VoIP and other real time apps

By On August 23, 2011 · In Mobile VoIP, Prioritization and traffic shaping, QoS - Quality of Service, SIP protocol, VoIP calls quality, VoIP over VPN

In order to improve the bandwidth allocation for certain apps in your wireless network you need to enable QoS (quality of service) feature on your router/access point. Please make sure that you have enough bandwidth available (down and up) on your [...]

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How to make your VoIP calls private and confidential

By On June 21, 2011 · In Asterisk, Mobile VoIP, Prioritization and traffic shaping, SIP protocol, VoIP calls quality, VoIP over VPN

There is no doubt a chance exists that your IP phone calls can be tapped and listened to. We will discuss here how to make sure your calls stay private and secure.

The possibility your VoIP calls being monitored is much higher then of conventional phone calls. The reason for this is that IP telephony [...]

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Think on solutions: VoIP phone system

By On June 21, 2011 · In Android, Asterisk, Mobile VoIP, Prioritization and traffic shaping, QoS - Quality of Service, SIP protocol, VoIP calls quality, VoIP over VPN

It is often taken for granted that installing VoIP solutions will save customers time and money, but in actual fact getting Return on Investment depends on a number of factors.

Firstly if you are planning to use VoIP phone system for business purposes, think about how it will integrate into your existing Public Switched [...]

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The QoS Dilemma

By On June 15, 2011 · In Prioritization and traffic shaping, QoS - Quality of Service, SIP protocol, VoIP calls quality

The problem with IP is that, like Ethernet, it is a connectionless technology and does not guarantee bandwidth.  Specifically, the protocol will not, in itself, differentiate network traffic based on the type of flow to ensure that the proper amount of bandwidth and prioritization level are defined for a particular type of application. By contrast, [...]

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VoIP calls over satellite links

By On June 14, 2011 · In Asterisk, Prioritization and traffic shaping, QoS - Quality of Service, SIP protocol, VoIP calls quality

VoIP services via high latency satellite links: overview

As we all know the VoIP market expanding rapidly over the past few years and SIP based services allows the voice communication over global Internet network, giving the customers great savings and more convenient service.  In the past with cooper wires you can do nothing about bad [...]

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Typical VoIP Problems: not right codec, packet loss, jitter, out‐of‐order packets

By On June 9, 2011 · In Asterisk, Mobile VoIP, Prioritization and traffic shaping, QoS - Quality of Service, SIP protocol, VoIP calls quality

Due to human perception, VoIP is much more sensitive to certain network conditions that are considered well within spec for most applications.

Network issues such as packet loss, jitter, and packet sequence errors are inherent to IP networks, and are well corrected and tolerated by data transfer protocols. Voice transmissions are real‐time by the nature; [...]

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QoS and VoIP – how to set priority for VoIP calls with TC

By On June 9, 2011 · In Asterisk, Prioritization and traffic shaping, SIP protocol, VoIP calls quality

The quality of  VoIP phone calls for sure depends on many factors. The main questions that we should understand are: how good is your termination provider and the carrier they are using for the prefix you’ve dialed? What codec is used? Do you have enough bandwidth for real time stream? In most cases even if all [...]

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