Check Jitter Internet - Jitter Internet Test

TheJitter is generally caused by congestion in the IP network. The congestion can occur either at the router interfaces or in a provider or carrier network if the circuit has not been provisioned correct information.

Encapsulation Considerations

The easiest and best place to start looking for jitter is at the router interfaces since you have direct control over this portion of the circuit. How you track down the source of the jitter depends greatly on the encapsulation and type of link where the jitter happens. Typically, ATM circuits do not experience jitter when configured correctly due to the constant cell rate involved. This gives a very consistent latency. If gitter is seen in an ATM environment, examination of the ATM configuration is necessary. When ATM works correctly (no dropped cells), you can expect jitter to be a non-issue. In Point-to-Point Protocol (PPP) encapsulation, jitter is almost always due to serialization delay. This can easily be managed with Link Fragmentation and Interleaving on the PPP link. The nature of PPP means that PPP endpoints talk directly to each other, without a network of switches between them. This is so that the network administrator has control over all interfaces involved.(Check here)

Jitter in a Frame Relay Environment

Three parameters need to be addressed to find the jitter in a Frame Relay environment:

• Traffic Shaping
• Fragmentation
• Queueing

For sample configurations and information related to configuring this, refer to VoIP over Frame Relay with Quality of Service.

Traffic Shaping

You need to ensure that you are shaping the traffic that leaves the router to the actual Committed Information Rate (CIR) that the carrier provides. Verify this by looking at the Frame Relay statistics and check with the carrier. The first place to look is at the Frame Relay statistics. Use the show frame-relay pvc xx command , where xx is the Data-link connection identifier (DLCI) number. You should receive output similar to this:

The challenging part of VoIP traffic is that it needs to compete with all other traffic and also be delivered in real-time in order to achieve a good audio quality level. With email or file downloads, if a packet is received out of order or delayed by a few seconds, the user probably won’t even notice. On the contrary, VoIP packets have to arrive in real-time in order to have an intelligible conversation.

One way that we see jitter on a day-to-day basis is in random lines and blocks of pixels appearing out of place in a television screen. Another common result of jitter is delays in data transmission, resulting in packets of information to have to be resent. It also commonly shows up in CD playback of music. This can sound like miniscule skips or sound overlap where the same sound is played twice. These flaws are miniscule enough that one must listen closely to hear them.

There are a lot of different online tools that can be used to measure internet speed, but one of the most common and easy to use tools which we’ll be using as an example today is the one provided Click here to test jitter speed test

Troubleshoot more proactively with an enterprise-grade jitter test tool

Making sure bandwidth and other network resources are provisioned appropriately can go a long way to reducing jitter. VNQM can list the top ten call quality issues and the distribution of VoIP and data for each designated gateway. This can make it easier to see how your VoIP capacity is being used, so you can adjust your QoS settings or network configuration as needed.

The most annoying aspect of jitter is how it can vary in degree, even during the course of a single VoIP conversation. We hinted earlier that one of the surest ways to reduce jitter to a minimum is proper initial set-up. A correctly set-up VoIP network, like Nextiva, will include what’s called a ‘jitter buffer’.

• For your network, activate the jitter buffering and before implementation consult your VoIP provider as some providers might include this along with the devices they own.
• Conduct the jitter speed test at regular intervals.
• Choose a powerful router that smartly handles the jitter issues and consider upgrading the the ethernet cables
• Limit the unnecessary bandwidth consumption of your network connection
• Make use of the high speed internet connection as slow internet speeds are more likely to cause jitter issues in case bandwidth is shared with others.

• Is jitter bad?

Unlike packet loss, jitter is not inherently bad. It depends on how high its value is, but realistically, all networks experience jitter every once in a while, and the issue often fixes itself, without any intervention on your side.

• What is a good jitter speed?

Run our suggested tests (ping) and determine your average latency value, as well as the jitter (in ms). Compare the two results. Jitter should never exceed more than 15% of the average latency.

Test Some other ISP Check Below:

• Ping Test
• Download Speed Test
• Upload Speed Test
• Jitter Speed Test
• Letency Speed Test